Capitola City Council
November 14, 2024

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

17.156.060 Performance guarantees.

A. Security Required. The community development director may require an applicant to provide adequate security to guarantee the proper completion of any approved work or compliance with any conditions of approval.

B. Form of Security. The security shall be in the form of cash, a certified or cashier’s check, or a performance bond executed by the applicant and a corporate surety authorized to do business in California and approved by the city.

C. Amount of Security. The community development director shall determine the amount of the security necessary up to one hundred fifty percent of project cost to ensure proper completion of the approved work or compliance with any conditions of approval.

D. Duration of Security. The security shall remain in effect until all work has been completed and conditions fulfilled to the satisfaction of the community development director or until a specified warranty period has elapsed.

E. Release of Security. The security deposit shall be released upon completion of the approved work or compliance with any conditions of approval.

F. Failure to Comply.

1. Upon failure to complete any work or comply with conditions, the city may complete the work or fulfill the condition, and may collect from the applicant or surety all costs incurred, including administrative, engineering, legal, and inspection costs.

2. Any unused portion of the security shall be refunded to the funding source. (Ord. 1043 § 2 (Att. 2), 2020)

17.156.070 Changes to an approved project.

An approved project shall be established only as approved by the review authority, except when changes to the project are approved in compliance with this section.

A. Request for a Change. An applicant shall request desired changes in writing, and shall submit appropriate supporting materials and an explanation for the request.

B. Notice and Hearing. If the original approval required a noticed public hearing, a noticed public hearing is required for the requested change, except as allowed by subsection C of this section (Minor Changes).

C. Minor Changes. The community development director may authorize minor changes to an approved project if the changes comply with all of the following criteria:

1. The requested changes are consistent with the zoning code.

2. The requested changes are consistent with the spirit and intent of the original approval.

3. The requested changes do not involve a feature of the project that was a basis for findings in a negative declaration, mitigated negative declaration, or environmental impact report for the project.

4. The requested changes do not involve a feature of the project that was a basis for conditions of approval for the project.

5. The requested changes do not involve a feature of the project that was a specific consideration by the review authority in granting the approval.

6. The requested changes do not involve any expansion, intensification, or increase in size of the land use or structure.

7. The requested changes comply with the criteria above and involve a minor change to the project design that maintains the essential elements of the project as originally approved. Minor changes to a project design include but are not limited to modifications to:
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Capitola Municipal Code
Chapter 17.156 POST-DECISION PROCEDURES

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023. a. The location, size, or design of a surface parking area if consistent with Chapter 17.76 (Parking and Loading).
b. The location or design of an accessory structure one hundred twenty square feet and ten feet in height or less.
c. The size, placement, or number of doors and windows provided the changes affect fewer than twentyfive percent of the structure’s doors and windows and no new privacy impacts would be created. d. Materials affecting less than twenty-five percent of the building facade provided the changes maintain the approved architectural style of the structure.
e. Fences and walls if consistent with Chapter 17.60 (Fences and Walls). f. Landscaping if consistent with Chapter 17.72 (Landscaping). g. Exterior lighting if consistent with Chapter 17.96 (Supplemental Standards). h. Roof forms and materials provided there is no increase in structure height. i. Facade articulation such as porch columns, shutters, tile work, and other architectural details.

Modifications that fundamentally alter the architectural style of a structure are not considered a minor change.
j. The number, location, and size of decks and patios provided no new noise or privacy impacts would be created.
k. The number, size, type, and location of skylights.
l. Other similar minor changes to project design as determined by the community development director. (Ord. 1043 § 2 (Att. 2), 2020)

17.156.080 Time limits and extensions.

A. Expiration of Permit.

1. A permit not exercised within two years shall expire and become void, except where:
a. The Pplanning Ccommission or Ccity Ccouncil establishes an alternative expiration date when initially approving the permit; or
b. aAn extension of time is approved as allowed by subsection C of this section (Extension of Time).

2. A permit shall expire and become void if the permitted land use is abandoned or discontinued for one year or longer.

B. Exercised Defined. A permit or approval shall be considered exercised when:

1. A building permit is issued and construction has commenced;

2. A certificate of occupancy is issued; or

3. The land use is established.

C. Extension of Time. The community development director may approve eExtensions to a permit may be approved in the following manner:

1. Extensions to a permit may be approved by the review authority which originally approved the permit. 232
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Capitola Municipal Code
Chapter 17.156 POST-DECISION PROCEDURES

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

2. In instances where the community development director was the approval authority, the community development director may choose to refer any action to extend a permit to the planning commission for review and final decision.

3. The review authoritycommunity development director may approve up to two two-year extensions (four years total) to a permit. The planning commission and Ccity Ccouncil may approve up to two four-year extensions (eight years total) to a permit. The review authority may also approve an extension up to the expiration date of a valid tentative map as allowed by the Subdivision Map Act for projects involving a subdivision of land if such an extension is necessary to prevent a substantial hardship for the project applicant.

4. The applicant shall submit to the community development department a written request for an extension of time no later than ten days before the expiration of the permit.

5. The review authority may extend the permit if the applicant has proceeded in good faith and has exercised due diligence in efforts to exercise the permit in a timely manner.

6. The burden of proof is on the applicant to demonstrate that the permit should be extended. (Ord. 1043 § 2 (Att. 2), 2020)

17.156.090 Resubmittals.

A. Resubmittals Prohibited. For a period of twelve months following the denial or revocation of a permit, the city shall not accept an application for the same or substantially similar permit for the same site, unless the denial or revocation was made without prejudice, and so stated in the record.

B. Determination. The community development director shall determine whether the new application is for a permit which is the same or substantially similar to the previously denied or revoked permit.

C. Appeal. The determination of the community development director may be appealed to the planning commission, in compliance with Chapter 17.112 (Permit Application and Review). (Ord. 1043 § 2 (Att. 2), 2020)

17.156.100 Permits to run with the land.

Permits issued in compliance with the zoning code remain valid upon change of ownership of the site, structure, or land use that was the subject of the permit application. (Ord. 1043 § 2 (Att. 2), 2020)

17.156.110 Permit revocation.

Any discretionary permit may be revoked as provided for in this section.

A. Review Authority.

1. A permit may be revoked by the review authority which originally approved the permit.

2. In instances where the community development director was the approval authority, the community development director may choose to refer any action to revoke a permit to the planning commission for review and final decision.

B. Property Owner Notification. Prior to initiating proceedings to revoke a permit, the community development director shall notify the property owner of the permit violations, identify necessary corrections, and establish a reasonable period within which the property owner shall correct the violations. If the property owner has not corrected the violation within the specified period of time, the city may proceed with the process to revoke the permit.

C. Public Notice and Hearing. Public notice and hearing for any action to revoke a permit shall be provided in compliance with Chapter 17.148 (Public Notice and Hearings).

D. Findings. The review authority may revoke a permit only if one or more of the following findings can be made:

1. The applicant or property owner has altered the circumstances under which the permit was granted to a degree that one or more of the findings required to grant the original permit can no longer be made. 233
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Capitola Municipal Code
Chapter 17.156 POST-DECISION PROCEDURES

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

2. Permit issuance was based on misrepresentation by the applicant, either through the omission of a material statement in the application, or in public hearing testimony.

3. One or more conditions of approval have been violated, or have not been complied with or fulfilled.

4. The use or structure for which the permit was granted no longer exists or has been discontinued for a continuous period of at least twelve months.

5. The applicant or property owner has failed or refused to allow inspections for compliance.

6. Improvements authorized by the permit are in violation of the zoning code or any law, ordinance, regulation, or statute.

7. The use or structure is being operated or maintained in a manner which constitutes a nuisance.

E. Effect of Revocation. The revocation of a permit shall have the effect of terminating the approval and denying the privileges granted by the permit.

F. Appeals. A decision on a permit revocation may be appealed in accordance with Chapter 17.152 (Appeals). (Ord. 1043 § 2 (Att. 2), 2020)
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

Chapter 17.160

GLOSSARY
Sections:

17.160.010 Purpose.

17.160.020 Definitions.

17.160.010 Purpose.

This chapter provides definitions of terms and phrases used in the zoning code that are technical or specialized, or which may not reflect common usage. If any of the definitions in this chapter conflict with others in the municipal code, these definitions shall control for only the provisions of this zoning code. If a word is not defined in this chapter or in other chapters of the zoning code, the community development director shall determine the appropriate definition. (Ord. 1043 § 2 (Att. 2), 2020)

17.160.020 Definitions.

A. “A” Terms.

1. “Abutting” or “adjoining” means having a common boundary, except that parcels having no common boundary other than a common corner shall not be considered abutting.

2. “Accessory dwelling unit” means a self-contained living unit, either attached to or detached from, and in addition to, the primary residential unit on a single parcel. a. “Accessory dwelling unit, attached” means an accessory dwelling unit that shares at least one common wall with the primary residential unit.
b. “Accessory dwelling unit, detached” means a secondary dwelling unit that does not share a common will with the primary residential unit.

3. “Accessory structure” means a structure that is incidental and subordinate to a primary structure or use located on the same parcel. Includes garages, sheds, hot tubs, pergolas, and other similar structures.

4. “Accessory use” means a land use which is incidental and subordinate to a primary land use located on the same parcel.

5. “Addition” means any development or construction activity that expands the footprint or increases the floor area of a building.

6. “Adjacent” means directly abutting, having a boundary or property line(s) in common or bordering directly, or contiguous to.

7. “Alcoholic beverage sales” means the sale of alcoholic beverages for on-site consumption at a restaurant, bar, nightclub or other establishment, or the retail sale of alcoholic beverages for off-site consumption.

8. Alteration. See “Modification.”

9. “Applicant” means any person, firm, partnership, association, joint venture, corporation, or an entity or combination of entities which seeks city permits and approvals.

10. “Arbor” means a freestanding unenclosed structure with vertical latticework on two sides for climbing plants and crossbeams or lattice forming a covering connecting the sides. The space between the vertical latticework may be open or contain a bench for sitting.

11. “Assumed ground surface” means a line on each elevation of an exterior wall or vertical surface which connects those points where the perimeter of the structure meets the finished grade. 235
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

12. “Average slope” means the average slope of a parcel calculated using the formula: S = 100(I)(L)/A, where:
a. S = Average slope (in percent);
b. I = Contour interval (in feet);
c. L = Total length of all contour lines on the parcel (in feet); and d. A = Area of subject parcel (in square feet).

B. “B” Terms.

1. “Balcony” means a platform that projects from the wall of a building thirty inches or more above grade that is accessible from the building’s interior, is not accessible from the ground and is not enclosed by walls on more than two sides.

2. “Banks” means a commercial establishment providing retail banking services. Includes only establishments serving walk-in customers or clients, including banks, savings and loan institutions, check-cashing services, and credit unions.

3. “Base zoning district” means the primary zoning, as distinguished from an overlay zone, that applies to a parcel of land as shown on the zoning map.

4. “Basement” means that portion of a building between floor and ceiling, which is partly or all below grade, and where more than the vertical distance from grade to ceiling is below the average ground contact level of the exterior walls of the building.

5. “Bay window” means a window or series of windows serving as an important element of the building’s architecture, forming an alcove in a room and projecting outward from the wall in a rectangular, polygonal, or curved form.

6. “Block” means the property abutting on one side of a street and lying between the two nearest intersecting streets.

7. “Bluff” or “cliff” means the scarp or steep face of rock, decomposed rocks, sediment or soil resulting from erosion, faulting, folding or excavation of land mass and exceeding ten feet in height, and includes what are commonly known as “cliffs.” See also the definition of “coastal bluff” in Section 17.44.030.

8. “Building” means any structure used or intended for supporting or sheltering any use or occupancy.

9. “Building coverage” means the land area covered by all buildings and accessory structures on a parcel.

10. “Building face” means and includes the general outer surface of a main exterior wall of a building. For example, a building with a rectangular plan has four main exterior walls and four building faces.

11. “Building height” means the vertical distance measured from the assumed ground surface of the building to the highest point of the roof, ridge, or parapet wall.

12. “Business services” means an establishment that provides services to other businesses on a fee or contract basis. Includes computer rental and repair, catering, printing and duplicating services, outdoor advertising services, package delivery services, equipment rental and leasing, and other similar land uses.

13. “By right” means permitted without any form of discretionary approval.

C. “C” Terms.
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

1. “California Environmental Quality Act (CEQA)” means California state law (Public Resources Code Section 2100 et seq.) requiring government agencies to consider the environmental consequences of their actions before taking action on a proposed project.

2. “Capitola Village” means the central core of Capitola generally bounded by the Monterey Bay shoreline to the south, the railroad trestle to the north and west, and Cliff Avenue and Depot Hill to the east.

3. “Car wash” means a commercial facility for the washing, waxing, or cleaning of automobiles or similar light vehicles.

4. “Caretaker quarters” means a residence that is accessory to a nonresidential primary use of the site, where needed for security, or twenty-four-hour care or supervision.

5. “Carport” means an accessory building to a residential structure, open on two, three or four sides and attached to, or detached from, a dwelling and established for the loading or unloading of passengers or the storage of an automobile.

6. “Clerestory Window” means a window where the bottom of the glass is at least six feet above the finished floor height.

76. “Coastal zone” means the area of land and water extending from the state’s outer seaward limit of jurisdiction inland to the boundary as shown in Capitola’s local coastal program (LCP) as certified by the California Coastal Commission.

8. “Cohousing” means an intentional, collaborative neighborhood that combines private homes with shared indoor and outdoor spaces designed to support an active and interdependent community life. 987. “Colleges and trade schools” means institutions of higher education providing curricula of a general, religious or professional nature, typically granting recognized degrees. Includes junior colleges, business and computer schools, management training, vocational education, and technical and trade schools. 1098. “Community assembly” means a facility that provides space for public or private meetings or gatherings.

Includes places of worship, community centers, meeting space for clubs and other membership organizations, social halls, union halls, banquet centers, and other similar facilities. 1109. “Community benefit” means a public amenity offered by a project applicant that advances general plan goals but is not required by the zoning code or any other provision of local, state, or federal law. 1210. “Commercial entertainment and recreation” means an establishment that provides entertainment or recreation activities or services for a fee or admission charge. Includes bowling alleys, electronic game arcades, billiard halls, pool halls, sports clubs, commercial gymnasiums, dancehalls, and movie theaters. 1321. “Community development director” means the community development director of the city of Capitola or his or her designee.
1432. “Construction and material yards” means storage of construction materials or equipment on a site other than a construction site. Includes public utility buildings and service yards used by a governmental agency. 1543. “Cultural institution” means a public or nonprofit institution that engages in cultural, scientific, and/or educational enrichment. Includes libraries, museums, performing art centers, aquariums, environmental education centers, nonprofit art centers and galleries, botanical gardens, and other similar uses. 1654. “Curb-side service” or “drive-up service” means service provided by a commercial establishment while a customer remains waiting within a vehicle.
1765. Custom Manufacturing. See “Manufacturing, custom.” D. “D” Terms.
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

1. “Dark sky compliant” means a lighting fixture that meets the International Dark Sky Association’s (IDA) requirements for reducing waste of ambient light.

2. “Day care center” means a facility that provides nonmedical care and supervision of minors for periods of less than twenty-four hours. Includes nursery schools, day nurseries, child care centers, infant day care centers, cooperative day care centers, and similar uses.

3. “Daylight plane” means the imaginary line beginning at a height of twenty feet at the setback from a property line and extending into the parcel at an angle of forty-five degrees.

4. “Deck” means an outdoor platform, either freestanding or attached to a building, which is supported by pillars or posts.

5. Demolition, Substantial. “Substantial demolition” means the removal or replacement of either fifty percent or more of the lineal footage of existing interior and exterior walls or fifty percent or more of the area of existing floor, ceilings, and roof structures.

6. “Density” means the number of dwelling units per acre of land, excluding street rights-of-way, public easements, public open space, land under water, and certified wetlands and floodplains.

7. “Design review” means that process for the city to review and act on a design permit application.

8. Designated Historic Resource. See Section 17.84.020(A) (Designated Historic Resources).

9. “Development” means any human-caused change to the land or a structure that requires a permit or approval from the city, including construction, rehabilitation, and reconstruction. See Section 17.44.030 for the definition of “development” that applies in the coastal zone.

10. “Development standards” means regulations in the zoning code that limit the size, bulk, or placement of structures or other improvements and modifications to a site.

11. “Discretionary approval” means an action by the city by which individual judgment is used as a basis to approve or deny a proposed project.

12. “Drive-through facility” means a facility where a customer is permitted or encouraged, either by the design of physical facilities or by the service procedures offered, to be served while remaining seated within a vehicle.

Includes drive-through restaurants, coffee shops, pharmacies, banks, automatic car washes, drive-up windows, and other similar land uses and services.

13. “Duplex home” means a residential structure that contains two dwelling units, each with its own entrance.

Each unit within a duplex home provides complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking, and sanitation.

14. “Dwelling unit” means a building or a portion of a building containing one or more habitable rooms used or designed for occupancy by one family for living and sleeping purposes, including kitchen and bath facilities.

E. “E” Terms.

1. “Eating and drinking establishments” means businesses primarily engaged in serving prepared food and/or beverages for consumption on or off the premises.
a. “Bars and lounges” means a business devoted to serving alcoholic beverages for consumption by guests on the premises and in which the serving of food is only incidental to the consumption of such beverages.

Includes cocktail lounges, nightclubs, taverns, and other similar uses. Also includes tasting rooms with more than one hundred sixty square feet of floor area accessible to the public. b. “Restaurants and cafes” means a business establishment serving food and beverages to customers where the food and beverages may be consumed on the premises or carried out and where more than one hundred 238
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023. sixty square feet of public area is open to customers. Includes full service restaurants, fast-food restaurants, coffee shops, cafes, and other similar eating and drinking establishments. c. “Take-out food and beverage” means establishments where food and beverages may be consumed on the premises, taken out, or delivered, but where the area open to customers is limited to no more than one hundred sixty square feet. Includes take-out restaurants, take-out sandwich shops, limited service pizza parlors and delivery shops, and snack bars. Also includes catering businesses or bakeries that have a storefront retail component and tasting rooms with one hundred sixty square feet or less of floor area accessible to the public. Excludes “bars and lounges.”

2. “Elderly and long-term care” means establishments that provide twenty-four-hour medical, convalescent or chronic care to individuals who, by reason of advanced age, chronic illness or infirmity, are unable to care for themselves, and are licensed as a skilled nursing facility by the state of California, including but not limited to rest homes and convalescent hospitals, but not residential care, hospitals, or clinics.

3. “Emergency shelter” means housing with minimal supportive services for homeless persons that is limited to occupancy of six months or less by a homeless person, as defined in Section 50801 of the California Health and Safety Code. An emergency shelter may include other interim interventions, including, but not limited to, a navigation center, bridge housing, and respite or recuperative care.

F. “F” Terms.

1. “Farmers’ market” means a market held in an open area or in a structure where groups of individual sellers offer for sale to the public such items as fresh produce, seasonal fruits, fresh flowers, locally produced arts and crafts items but excludes second-hand goods. Food and beverages dispensed from booths located on site is permitted as an accessory use.

2. “Financial institution” means a professional office conducting businesses within the financial industry.

Excludes commercial establishments providing retail banking services to walk-in customers or clients (see “Banks”).

3. “Fence” means a structure connected by boards, masonry, rails, panels, or other similar permanent building material for the purpose of enclosing space or separating parcels of land. This definition includes gates but excludes hedges and other living plants.

4. “Floor area” means the sum of the horizontal areas of all floors of an enclosed structure, measured from the outside perimeter of the exterior walls as described in Section 17.48.040 (Floor area and floor area ratio).

5. “Floor area ratio” means the gross floor area of all of the buildings on the parcel divided by the net parcel area.

6. “Food preparation” means businesses preparing and/or packaging food for off-site consumption, excluding those of an industrial character in terms of processes employed, waste produced, water used, and traffic generation. Includes catering kitchens, and small-scale specialty food production.

7. “Frontage” means that portion of all property abutting a street.

G. “G” Terms.

1. “Garage” means an enclosed structure or a part of a building designed or used for the storage of automobiles and other motor vehicles.

2. “Garage sale” means a temporary sale for the purpose of selling, trading or otherwise disposing of household furnishings, personal goods or other tangible properties of a resident of the premises on which the sale is conducted.

3. “Gas and service stations” means a retail business establishment supplying gasoline and oil and minor accessories for automobiles. Included in this definition are incidental food and beverage and car wash facilities. 239
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

4. “Group housing” means shared living quarters without separate kitchen or bathroom facilities for each room or unit, offered for rent for permanent or semi-transient residents on a weekly or longer basis. Includes rooming and boarding houses, single-room occupancy housing, dormitories, and other types of organizational housing, and extended stay hotels intended for long-term occupancy (thirty days or more). Excludes hotels, motels, bed and breakfasts, and residential care facilities.

5. “Geological hazard” means a threat to life, property or public safety caused by geological or hydrological processes such as faulting and secondary seismic effects, including but not limited to: liquefaction, landsliding, erosion, flooding, tsunami or storm wave inundation.

6. “Government offices” means a place of employment occupied by governmental agencies and their employees. Includes offices for administrative, clerical, and public contact functions but excludes corporation yards, equipment service centers, and similar facilities that primarily provide maintenance and repair services and storage facilities for vehicles and equipment.

7. “Grading” means any and all activities involving earthwork, including placement of fill and/or excavation.

8. “Ground floor” means the first floor of a building other than a cellar or basement that is closest to finished grade.

H. “H” Terms.

1. “Habitable space” means an area within a building that is conditioned (heated or cooled) with a finished floor and a ceiling height of at least seven feet six inches. Excludes unfinished attics, cellars, crawl spaces, and other similar utility areas.

2. Height. See “Building height.” For structures other than buildings, “height” means the vertical distance from grade to the highest point of the structure directly above.

3. “Home day care” means a facility providing daytime supervision and care for up to fourteen children located in the provider’s own home. Includes both small and large home day care facilities as defined in California Health and Safety Code Sections 1597.44 and 1597.465.

4. “Historic resource” means either a designated historic resource or a potential historic resource as defined in Section 17.84.020 (Types of historic resources).

5. “Historic alteration permit” means the city permit required to alter the exterior of a historic resource in accordance with Section 17.84.070 (Historic alteration permit).

6. “Home occupation” means the conduct of a business within a dwelling unit or residential site, with the business activity being subordinate to the residential use of the property. Does not include “vacation rental” as defined by this chapter.

I. “I” Terms.

1. “Impervious surface” means any surface that does not permit the passage of water. Impervious surfaces include buildings, parking areas, and all paved surfaces.

J. “J” Terms. None.

K. “K” Terms.

1. “Kitchen” means any room or part of a room used or intended or designed to be used for cooking or the preparation of food for a single dwelling unit, and distinct from a “mini-bar/convenience area” which is intended as a supplemental food preparation area within a single-family home.

L. “L” Terms.
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

1. “Land use” means an activity conducted on a site or in a structure, or the purpose for which a site or structure is designed, arranged, occupied, or maintained. The meaning of the term “use” is identical to “land use.”

2. “Landscaping” means the planting and maintenance of living plant material, including the installation, use, and maintenance of any irrigation system for the plant material, as well as nonliving landscape material (such as rocks, pebbles, sand, mulch, walls, fences, or decorative paving materials).

3. “Liquor store” means a business selling alcoholic beverages for off-site consumption with the sale of alcoholic beverages constituting its primary source of revenue.

4. “Local coastal program (LCP)” means the city’s land use plan and implementation plan which includes portions of the municipal code, portions of the zoning code, zoning map (as more specifically identified in Chapter 17.44 (Coastal Overlay Zone) and actions certified by the Coastal Commission as meeting the requirements of the California Coastal Act of 1976.

5. Light Manufacturing. See “Manufacturing, light.”

6. “Lodging” means an establishment providing overnight accommodations to transient patrons for payment for periods of less than thirty consecutive days.
a. “Bed and breakfast” means a residential structure that is in residential use with one or more bedrooms rented for overnight lodging and where meals may be provided. b. “Hotel” means an establishment providing overnight lodging to transient patrons. Hotels and motels may provide additional services, such as conference and meeting rooms, restaurants, bars, or recreation facilities available to guests or to the general public. Includes motor lodges, motels, extended-stay hotels, and tourist courts, but does not include group housing or bed and breakfast establishments, which are separately defined and regulated.

7. Lot. See “Parcel.”
M. “M” Terms.

1. “Maintenance and repair services” means businesses which provide construction, maintenance and repair services off site, but which store equipment and materials or perform fabrication or similar work on site.

Includes off-site plumbing shops, general contractors, contractor’s storage yards, appliance repair, janitorial services, electricians, pest control, heating and air conditioning, roofing, painting, landscaping, septic tank service, and other similar uses.

2. “Manufacturing, custom” means establishments primarily engaged in on-site production of goods by hand manufacturing or artistic endeavor, which involves only the use of hand tools or small mechanical equipment and the incidental direct sale to consumers of only those goods produced on site. Typical uses include ceramic studios, candle making shops, woodworking, and custom jewelry manufacturers.

3. “Manufacturing, light” means the manufacture, predominantly from previously prepared materials, of finished products or parts, including processing, fabrication, assembly, treatment, and packaging of such products, and incidental storage, sales and distribution of such products, but excluding basic industrial processing and custom manufacturing.

4. “Material change” means any significant alteration, by private or public action, in the external appearance or surface of an improvement, landscape or vista. This shall not include ordinary maintenance which does not require a permit.

5. “Micro-Unit’ means a multifamily dwelling unit 350 square feet or less with a fully functioning kitchen and bathroom.

65. “Ministerial action” means a city decision on a planning permit which involves only the use of fixed standards or objective measurements and does not require the exercise of discretion. 241
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Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

76. “Mini-bar/convenience area” means a supplemental food preparation area within a single-family home subject to the standards in Section 17.16.030(B)(89) (Mini-Bar/Convenience Areas).

87. “Medical offices and clinics” means a facility where medical, mental, dental, or other personal health services are provided on an outpatient basis using specialized equipment. Includes offices for physicians, dentists, and optometrists, diagnostic centers, blood banks and plaza centers, and emergency medical clinics offered exclusively on an out-patient basis. Hospitals are excluded from this definition.

98. “Mixed use” means two or more different land uses located in one structure or on one parcel or development site.
109. “Mobile food vendors” means businesses selling food or drinks from temporary and semi-permanent structures or mobile equipment such as food trucks or pushcarts. 110. Mobile Home Park. See Section 17.100.030 (Definitions). 121. “Modification” means any construction or physical change in the internal arrangement of rooms or the supporting members of a structure, or a change in the external appearance of any structure, not including painting.
132. “Multifamily dwelling” means a building that contains three or more dwelling units, with each unit providing complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking, and sanitation.

N. “N” Terms.

1. “Nonconforming parcel” means a parcel that was lawfully established but that no longer conforms with the parcel size or dimension standards of the zoning district in which it is located.

2. “Nonconforming structure” means a structure which does not meet the current development standards for the district in which the structure is located. Development standards include, but are not limited to, setbacks, height or lot coverage regulations of the zoning district, but do not include standards contained in the uniform codes, such as the building code.

3. “Nonconforming use” means a use that lawfully occupied a building or land at the time the use was established, but that no longer conforms with the use regulations of the zoning district in which it is located.

O. “O” Terms.

1. “Open space, private” means open areas for outdoor living and recreation that are adjacent and directly accessible to a single dwelling unit, reserved for the exclusive use of residents of the dwelling unit and their guests.

2. “Open space, common” means areas for outdoor living and recreation that are intended for the use of residents and guests of more than one dwelling unit.

3. “Outdoor kitchen” means an outdoor space used or intended or designed to be used for cooking or the preparation of food for a single dwelling unit subject to the standards in Section 17.16.030(B)(910). Outdoor pizza ovens are included in the definition of an outdoor kitchen.

4. “Overlay zone” means an additional zoning district as shown on the zoning map that prescribes special regulations to a parcel in combination with the base zoning district.

P. “P” Terms.

1. “Parcel” means a lot, tract, or area of land whose boundaries have been established by a legal instrument such as a deed or map recorded with the county of Santa Cruz, and which is recognized as a separate legal 242
Item 8 C.

Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023. entity for purposes of transfer of title, except public easements or rights-of-way. The meaning of “lot” is identical to “parcel.”

2. Parcel Area, Gross. “Gross parcel area” means the total horizontal area included within the parcel lines of the parcel, including one-half the width of any alley or portion thereof abutting a parcel line.

3. Parcel Area, Net. “Net parcel area” means the gross parcel area excluding: (a) any recorded easements to allow others to use the surface of the property for necessary access to an adjacent property or other similar use such as a shared driveway or public access agreement (excludes utility easements), and (b) any area under the high water mark that extends into a waterway.

4. Parcel, Corner. “Corner parcel” means a parcel situated at the junction of two or more intersecting streets, with a parcel line bordering on each of the two or more streets.

5. “Parcel depth” means the average distance from the front parcel line to the rear parcel line, measured in the general direction of the side parcel lines.

6. “Parcel line” means the lines bounding a parcel.

7. Parcel Line, Front. “Front parcel line” means that dimension of a parcel or portion of a parcel, abutting on a street except the side of a corner parcel. On a corner parcel the narrowest street frontage is considered the front parcel line. The community development director has the authority to determine and designate the front parcel line based on existing conditions and function of the lot.

8. Parcel Line, Rear. “Rear parcel line” means, ordinarily, the line of a parcel which is generally opposite the front parcel line of said parcel. The community development director has the authority to determine and designate the front parcel line based on existing conditions and function of the lot.

9. Parcel Line, Interior Side. “Interior side parcel line” means any boundary line not a front line or a rear line shared with another parcel.

10. Parcel Line, Exterior Side. “Exterior side parcel line” means any boundary line not a front line or a rear line adjacent to a street.

11. Parcel, Reversed Corner. “Reversed corner parcel” means a corner parcel, the side street line of which is substantially a continuation of the front line of the parcel upon which it rears.

12. “Parcel width” means the average distance between the side parcel lines, measured at right angles to the parcel depth.

13. “Parking lot” means an open area of land, a yard or other open space on a parcel other than a street or alley, used for or designed for temporary parking for more than four automobiles and available for public use, whether free, for compensation, or as an accommodation for clients or customers.

14. “Parking space” means land or space privately owned, covered or uncovered, laid out for, surfaced, and used or designed to be used for temporary parking or storage of standard motor vehicles.

15. “Parks and recreational facilities” means noncommercial public facilities that provide open space and/or recreational opportunities. Includes parks, community gardens, community centers, passive and active open space, wildlife preserves, playing fields, tennis courts, swimming pools, gymnasiums, and other similar facilities.

16. “Pergola” means an unenclosed structure with vertical posts or pillars that supports crossbeams and/or an open lattice. A pergola may be freestanding or attached to a building.

17. “Personal services” means an establishment that provides services to individuals and that may provide accessory retail sales of products related to the services provided. Includes barber shops and beauty salons, nail salons, dry cleaning establishments, self-service laundromats, tailors, tanning salons, state-licensed massage 243
Item 8 C.

Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023. therapists, fitness studios, yoga studios, dance studios, pet grooming services, veterinary clinics, and other similar land uses. Also includes establishments that primarily offer specialized classes in personal growth and development such as music, martial arts, vocal, fitness and dancing instruction. This does not include professional offices that offer classes in addition to the professional office spaces.

18. “Planning permit” means any permit or approval required by the zoning code authorizing an applicant to undertake certain land use activities.

19. Potential Historic Resource. See Section 17.84.020(B) (Potential Historic Resource).

20. “Primary use” means the main purpose for which a site is developed and occupied, including the activities that are conducted on the site a majority of the hours during which activities occur.

21. “Primary structure” means a structure that accommodates the primary use of the site.

22. “Professional office” means a place of employment occupied by businesses providing professional, executive, management, or administrative services. Includes offices for accountants, architects, advertising agencies, insurance agents, attorneys, commercial art and design services, nonretail financial institutions, real estate agents, news services, photographers, engineers, employment agencies, and other similar professions.

Also includes research and development facilities that engage in research, testing, and development of commercial products or services in technology-intensive fields.

23. “Public safety facility” means a facility operated by a governmental agency for the purpose of protecting public safety. Includes fire stations and other fire-fighting facilities, police stations, public ambulance dispatch facilities, and other similar land uses.

Q. “Q” Terms. None.

R. “R” Terms.

1. “Recreational vehicle (RV)” means a motor home, travel trailer, truck camper, or camping trailer, with or without motive power, originally designed for human habitation for recreational, emergency, or other occupancy, which meets all of the following criteria:
a. Contains less than three hundred twenty square feet of internal living room area, excluding built-in equipment, including wardrobe, closets, cabinets, kitchen units or fixtures, and bath or toilet rooms; b. Contains four hundred square feet or less of gross area measured at maximum horizontal projections; c. Is built on a single chassis; and
d. Is either self-propelled, truck-mounted, or permanently towable on the highways without a towing permit.

2. “Recycling collection facility” means a center for the acceptance by donation, redemption, or purchase, of recyclable materials from the public.

3. “Remodel” means a change or alteration in a building that does not increase the building’s net square footage.

4. “Residential care facility” means a state-licensed residential facility providing social and personal care for residents. Includes children’s homes, homes for the elderly, orphanages, self-help group homes, supportive housing, and transitional housing for the homeless. Excludes facilities where medical care is a core service provided to residents, such as nursing and convalescent homes. a. “Residential care facility, large” means a residential care facility for seven or more persons. b. “Residential care facility, small” means a residential care facility for six or fewer persons. 244
Item 8 C.

Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

5. “Residential mixed use” means one or more structures on a single parcel that contains both dwelling units and nonresidential uses such as retail, restaurants, offices, or other commercial uses. Different land uses may be within a single structure (vertical mixed use) or in separate structures on a single parcel (horizontal mixed use).

6. “Residential use” means any legal use of a property as a place of residence, including but not limited to dwelling units, group housing, and the residential component of a mixed-use residential building.

7. “Retail” means stores and shops selling merchandise to the general public. Includes drug stores, general merchandise stores, convenience shops, pet stores, department stores, grocery stores and other similar retail establishments.

8. “Retail cannabis establishment” means a retail store in which cannabis or cannabis products are sold for adult use and/or medicinal use.

98. “Review authority” means the city official or city body that is responsible, under the provisions of the zoning code, for approving or denying a permit application or other request for official city approval. 109. “Roof deck” means an occupied roof space created by a a walkable exterior floor system located above the top story of a structure, not including access, and supported by the roof of a building.

S. “S” Terms.

1. “Salvage and wrecking” means storage and dismantling of vehicles and equipment for sale of parts, as well as their collection, storage, exchange or sale of goods including, but not limited to, any used building materials, used containers or steel drums, used tires, and similar or related articles or property.

2. “Schools, public or private” means public or private facilities for education, including elementary, junior high, and high schools, providing instruction and study required in public schools by the California Education Code.

3. “Setback” means the minimum allowable distance from a given point or line of reference such as a property line to the nearest vertical wall or other element of a building or structure as defined in this chapter, or from a natural feature such as a bluff edge or an environmentally sensitive habitat area. Setbacks for buildings or structures shall be measured at right angles from the nearest property line establishing a setback area line parallel to that parcel line. Where a property line is located within a street, the setback shall be measured from the edge of the right-of-way containing the street.

4. Sign. See Chapter 17.80 (Signs).

5. “Single-family dwelling” means a residential structure designed for occupancy by one household. A singlefamily dwelling provides complete, independent living facilities for one or more persons, including permanent provisions for living, sleeping, eating, cooking, and sanitation. The “term Ssingle-family dwelling” includes employee housing for six or fewer persons as defined in Health and Safety Code Section 17008.

6. “Single-room occupancy” means housing consisting of a single-room dwelling unit that is the primary residence of its occupants. A single-room occupancy must include either food preparation or sanitary facilities (or both) and must be four hundred square feet or less.

7. “Site” means a parcel or adjoining parcels that are under single ownership or single control, and that are considered a unit for the purposes of development or other use.

8. “Site area” means the total area included within the boundaries of a site.

9. “Self-storage” means a structure or group of structures with controlled access that contains individual and compartmentalized stalls or lockers for storage of customers’ goods.

10. “Split zoning” means a parcel on which two or more zoning districts apply due to zoning district boundaries crossing or otherwise not following the parcel boundaries. 245
Item 8 C.

Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

11. “Story” means that portion of a building included between the upper surface of any floor and the upper surface of the floor next above, except that the topmost story shall be that portion of a building included between the upper surface of the topmost floor and the ceiling or roof above. If the finished floor level directly above a basement, cellar or unused under-floor space is more than six feet above grade as defined in this chapter for more than fifty percent of the total perimeter or is more than twelve feet above grade as defined in this chapter at any point, such basement, cellar or unused under-floor space shall be considered as a story.

12. Story, Half. “Half story” means a partial story under a gable, hip or gambrel roof, the wall plates of which are at least two opposite exterior walls and which are not more than four feet above the floor plate of the second floor, and may include shed or dormer projections from those walls. Dormers may constitute not more than one-third of the length of the wall upon which they are located, whether as a single unit or multiple dormers.

13. “Street” means a public way more than twenty feet in width which affords a primary or principal means of access to abutting property. “Streets” includes private roads and highways.

14. “Structural alterations” means any change in the supporting members of a building, such as bearing walls, columns, beams, girders, floor, ceiling or roof joists and roof rafters, or change in roof exterior lines which would prolong the life of the supporting members of a building.

15. “Structure” means anything constructed or erected that requires attachment to the ground, or attachment to something located on the ground. Pipelines, poles, wires, and similar installations erected or installed by public utility districts or companies are not included in the definition of “structure.” In the coastal zone, “structure” includes, but is not limited to, any building, road, pipe, flume, conduit, siphon, aqueduct, telephone line, and electrical power transmission and distribution line.

16. “Supportive housing” means housing with no limit on length of stay, that is occupied by low income adults with disabilities, and that is linked to on-site services that assist the supportive housing resident in retaining the housing, improving his or her health status, and maximizing his or her ability to live and, when possible, work in the community.

T. “T” Terms.

1. “Tandem parking” means an arrangement of parking spaces such that one or more spaces must be driven across in order to access another space or spaces.

2. “Tasting room” means a room or rooms, open to the general public, primarily used for the retail marketing of winery, brewery, distillery, and/or food products.

3. “Temporary structure” means a structure that is erected for a limited period of time, typically no longer than one hundred eighty days, and that does not permanently alter the character or physical facilities of a property.

4. “Temporary use” means a short-term activity that may or may not meet the normal development or use standards of the applicable zone, but that occurs for a limited period of time, typically less than twelve months, and does not permanently alter the character or physical facilities of a property.

5. “Transitional housing” means temporary housing, generally provided for a period of six months to several years, with supportive services that prepare individuals or families to transition from emergency or homeless shelters to permanent housing. Such housing may be configured for specialized needs groups such as people with substance abuse problems, mental illness, domestic violence victims, veterans, or people with specified illnesses. Such housing may be provided in apartment complexes, boarding house complexes, or in singlefamily homes.

65. “Trellis” means a structure made from an open framework or lattice of interwoven or intersecting pieces of wood, bamboo or metal made to support and display climbing plants. A trellis may be freestanding or attached to a building wall or other structure.

U. “U” Terms.
246
Item 8 C.

Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

1. “Upper floor” means any story of a building above the ground floor.

2. “Urban agriculture” means activities involving the raising, cultivation, processing, marketing, and distribution of food in urban areas.
a. “Home garden” means the property of a single-family or multifamily residence used for the cultivation of fruits, vegetables, plants, flowers, or herbs by the residents of the property, guests of the property owner, or a gardening business hired by the property owner. b. “Community garden” means privately or publicly owned land used for the non-commercial cultivation of fruits, vegetables, plants, flowers, or herbs by multiple users. Community gardens may be divided into separate plots for cultivation by one or more individuals or may be farmed collectively by members of the group and may include common areas maintained or used by group members. c. “Urban farm” means privately or publicly owned land used for the cultivation of fruits, vegetables, plants, flowers, or herbs by an individual, organization, or business with the primary purpose of growing food for sale.

3. Use. See “Land use.”

4. “Utilities, major” means generating plants, electric substations, solid waste collection, including transfer stations and materials recovery facilities, solid waste treatment and disposal, water or wastewater treatment plants, and similar facilities of public agencies or public utilities.

5. “Utilities, minor” means infrastructure facilities that are necessary to serve development within the immediate vicinity such as electrical distribution lines and underground water and sewer lines.

V. “V” Terms.

1. “Vacation rental” means the occupancy for hire of residential property or a portion thereof for a period of less than thirty consecutive calendar days. See Section 17.40.030 (Vacation rental use (-VRU) overlay zone). “For hire,” for purposes of this section, does not include:
a. The owner or long-term lessee of the property, without consideration, allowing family or friends to use the property;
b. An arrangement whereby the owner or long-term lessee of the property agrees to a short-term trade with another property owner or long-term lessee whereby the sole consideration is each concurrently using the other’s property.

2. “Valet parking service” means a parking service provided to accommodate patrons of one or more businesses that is accessory and incidental to the business and by which an attendant on behalf of the business takes temporary custody of a patron’s motor vehicle and moves, parks, stores or retrieves the vehicle for the patron’s convenience.

3. “Vehicle repair” means an establishment for the repair, alteration, restoration, or finishing of any vehicle, including body repair, collision repair, painting, tire and battery sales and installation, motor rebuilding, tire recapping and retreading, and towing. Repair shops that are incidental to a vehicle sales or rental establishment on the same site are excluded from this definition.

4. “Vehicle sales and rental” means an establishment for the retail sales or rental of new or used vehicles.

Includes the sale of vehicle parts and vehicle repair; provided, that these activities are incidental to the sale of vehicles.

5. “Vehicle sales display room” means an establishment for the retail sales of new vehicles conducted entirely within an enclosed building. Outdoor storage and display of vehicles are not permitted.

W. “W” Terms.
247
Item 8 C.

Capitola Municipal Code
Chapter 17.160 GLOSSARY

The Capitola Municipal Code is current through Ordinance 1063, passed September 28, 2023.

1. “Wall” means a permanent upright linear structure made of stone, concrete, masonry, or other similar material.

2. “Warehousing and distribution” means an establishment used primarily for the storage and/or distributing of goods to retailers, contractors, commercial purchasers or other wholesalers, or to the branch or local offices of a company or organization. Includes vehicle storage, moving services, general delivery services, refrigerated locker storage facilities, and other similar land uses.

3. “Wholesaling” means indoor storage and sale of goods to other firms for resale. Wholesalers are primarily engaged in business-to-business sales, but may sell to individual consumers through mail or internet orders.

Wholesalers normally operate from a warehouse or office having little or no display of merchandise, and are not designed to solicit walk-in traffic.

4. “Wireless communications facility” means a facility that transmits or receives electromagnetic signals for the purpose of transmitting voice or data communications. See Chapter 17.104 (Wireless Communications Facilities).

X. “X” Terms. None.

Y. “Y” Terms.

1. “Yard” means an open space, other than a court, on the same parcel with a building, unoccupied and unobstructed from the ground upward, except for such encroachments allowed by the zoning code.

2. Yard, Front. “Front yard” means a yard extending across the full width of the parcel, the depth of which is the minimum horizontal distance between the front line of the parcel and the nearest line of the main building or enclosed or covered porch. On a corner parcel the front line of the parcel is ordinarily construed as the least dimension of the parcel fronting on a street.

3. Yard, Rear. “Rear yard” means a yard extending across the full width of the parcel, and measured between the rear line of the main building or enclosed or covered porch nearest the rear line of the parcel; the depth of the required rear yard shall be measured horizontally.

4. Yard, Side. “Side yard” means a yard on each side of the main building extending from the front yard to the rear yard, the width of each yard being measured between the side line of the parcel and the nearest part of the main building or enclosed or covered porch. (Ord. 1057 § 2 (Att. 1), 2022; Ord. 1043 § 2 (Att. 2), 2020) 248
Item 8 C.

Capitola Road
Clares Street
Jade Street
Kennedy Drive
M O N T E R E Y B A Y 41st Avenue
Wharf Road
Bay Avenue
Monterey Avenue
Park Avenue
Escalona Drive
49th Avenue
Capitola Avenue
45th Avenue
MH
MH
MH
MH
C-R
CF
CF
CF
CF I
R-1
R-1
R-1
R-1
R-1 R-1
C-C
RM-M
MU-N
RM-L
PD
PD
MU-N

P/OS-VS MH
MH
C-C
C-C
R-1
P/OS
Ø
1 Ø
1 D R A F T Z O N I N G M A P

C I T Y O F C A P I T O L A

Z O N I N G C O D E U P D A T E
0 500 1,000 Feet
Capitola Avenue
Monterey Ave
*See Local Coastal Program
Habitats Map for boundaries
of Environmentally Sensitive
Habitats Area Overlay Zone.
49th Avenue
Capitola Avenue
Monterey Avenue
Capitola Avenue
Vacation Rental Use Village Residential
A U G U S T 2 0 2 4
Source: ESRI, 2017; PlaceWorks, 2017.

Residential Zoning Districts
R-1 - Single-Family Residential
RM-L - Multi-Family Residential, Low Density
RM-M - Multi-Family Residential, Medium Density
RM-H - Multi-Family Residential, High Density
MH - Mobile Home Park
Mixed-Use Zoning Districts
MU-V - Mixed Use Village
MU-N - Mixed Use Neighborhood
Commercial and Industrial Zoning Districts
C-R - Regional Commercial
C-C - Community Commercial
I - Industrial
Other Zoning Districts
P/OS - Parks and Open Space
CF - Community Facility
PD - Planned Development
VS - Visitor Serving
Overlay Zones*
-CZ - Coastal Zone
-VRU - Vacation Rental Use
-VR - Village Residential
-VS - Visitor Serving
City Limit
Santa Cruz Coastal Zone Boundary
249
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024.

Chapter 18.03

RESIDENTIAL DENSITY BONUS
Sections:

18.03.010 Applicability.

18.03.020 Purpose.

18.03.030 Density bonus.

18.03.040 California Coastal Act.

18.03.050 Concession or incentive.

18.03.060 Waiver or reduction.

18.03.070 Parking.

18.03.080 Projects within affordable housing overlay zones.

18.03.090 Application.

18.03.100 Findings for approval of density bonus, concessions, incentives, waivers, or reductions.

18.03.110 Successor Government Code provisions.

18.03.010 Applicability.

The regulations set forth in this chapter apply in all RM (multiresidential) districts and in all CC, CR, CN and PO (commercial) districts. (Ord. 938 § 1, 2009)

18.03.020 Purpose.

The residential density bonus provisions of this chapter are intended to provide incentives for the production of housing for very low, lower income, and moderate income or senior households in accordance with Sections 65915 and 65917 of the California Government Code. In enacting this chapter, it is the intent of the city of Capitola to facilitate the development of affordable housing and to implement the goals, objectives, and policies of the city’s housing element. (Ord. 938 § 1, 2009)

18.03.030 Density bonus.

A separate application by an applicant for a residential development project of five or more units, including such residential development projects that include as a component of the development a land donation or construction of a child care facility, or a senior citizen housing development as defined in California Civil Code Section 51.3, is eligible for a density bonus consistent with the requirements of California Government Code Section 65915. An applicant for a density bonus may also request concessions, incentives, reductions, or waivers consistent with the requirements of Sections 65915(d) and 65915(e).

The applicant may request a lesser density bonus than that which is available to the project under Section 65915; however, the city shall not be required to similarly reduce the number or type of units required to be provided pursuant to Sections 65915(b), 65915(c), and 65915(f). In calculating the density bonus for a project, each project shall be entitled to only one density bonus as provided in Section 65915(b)(2), and density bonuses from more than one category may not be combined. When calculating the number of required affordable units to qualify a project for a density bonus, any calculations resulting in fractional units shall be rounded up to the next larger integer. (Ord. 938 § 1, 2009)

18.03.040 California Coastal Act.

Nothing in this section shall be construed to supersede or in any way alter or lessen the effect or application of the California Coastal Act (Division 20 (commencing with Section 3000) of the Public Resources Code). (Ord. 938 § 1, 2009)

18.03.050 Concession or incentive.

For purposes of this section, a concession or incentive shall mean a regulatory concession or incentive as defined in Section 65915(k) and as permitted by Section 65915(d). Developers requesting concessions and incentives shall submit a pro forma that demonstrates to the city that the requested concession or incentive results in identifiable, financially sufficient, and actual cost reductions to the project as required by Section 65915(k) and that the incentive or concession is required to provide for affordable housing costs. Nothing in this section requires the provision of 250
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024. direct financial incentives for the residential development project, including but not limited to, the provision of financial subsidies, publicly owned land, fee waivers, or waiver of dedication requirements. The city at its sole discretion may choose to provide such direct financial incentives. Any such incentives may require payment of prevailing wages by the residential development project if required by state law. All concessions or incentives shall require the approval of the planning commission. (Ord. 938 § 1, 2009)

18.03.060 Waiver or reduction.

For purposes of this section, a waiver or reduction shall mean a change to a development standard that would otherwise have the effect of physically precluding the construction of a development with any density bonus, concessions, or incentives permitted by this section. For purposes of this section, a development standard is as defined in Section 65915(o)(1). (Ord. 938 § 1, 2009)

18.03.070 Parking.

Upon the written request of the developer, for a development project that qualifies for a density bonus, the city shall not require parking ratios that exceed the ratios identified in Section 65915(p)(1). For purposes of this section, onsite parking may be provided through tandem parking or uncovered parking but not on-street parking. (Ord. 938 § 1, 2009)

18.03.080 Projects within affordable housing overlay zones.

If the development project is within an affordable housing overlay (AHO) district as defined and implemented in Section 17.40.020, the city may grant a density bonus greater than allowed by this section, if the applicant meets the AHO standards. A residential development project may utilize the AHO as an alternative to the use of state density bonus or may choose to utilize a state density bonus permitted by Section 65915 but may not utilize both the AHO and state density bonuses. (Ord. 938 § 1, 2009)

18.03.090 Application.

An application for a density bonus, incentive, concession, waiver, modification, or revised parking standard pursuant to this section shall be submitted in conjunction with the first application for the development project and shall be processed concurrently with all other applications required for the project by the Capitola Municipal Code. The cost of reviewing any required data submitted as part of the application in support of a request for a concession or incentive, including but not limited to the cost to the city of hiring a consultant to review said data, shall be borne by the applicant. The application shall be submitted on a form provided by the city and shall include, at a minimum, the following information:

A. A site plan showing the total number of units, the number and location of the affordable or senior units qualifying the project for a density bonus, and the number and location of the proposed density bonus units; B. The level of affordability of any proposed affordable units and their conformance with Section 65915(c); C. A description of any requested incentives, concessions, waivers, or reductions of development standards, or modified parking standards. An application for an incentive or concession shall also include a pro forma demonstrating to the city that the requested concession or incentive results in an identifiable, financially sufficient, and actual cost reduction. Where the applicant is requesting the reduction or waiver of a development standard, the applicant shall submit evidence demonstrating that the application of the development standard would physically preclude construction of the project at the densities or with the concessions or incentives that the project is entitled to under this section.

D. If a density bonus is requested for a land donation pursuant to California Government Code Section 65915(g), the application shall show the location of the land to be dedicated and provide evidence that the requirements of Section 65915(g) have been met, thus entitling the project to the requested density bonus.

E. If a density bonus is requested for construction of a child care facility pursuant to California Government Code Section 65915(h), the application shall show the location and square footage of the proposed facility and provide evidence that the requirements of Section 65915(h) have been met, thus entitling the project to the requested density bonus. (Ord. 938 § 1, 2009)
251
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024.

18.03.100 Findings for approval of density bonus, concessions, incentives, waivers, or reductions.

A. Before approving a request for a density bonus, incentive, concession, parking reduction, or waiver, the review authority shall make the following findings, as applicable:

1. The residential development project is eligible for a density bonus and for any concessions, incentives, waivers, or parking reductions requested; conforms to all standards for affordability required by Section 65915(c); and includes a financing mechanism for all implementation and monitoring costs.

2. Any requested incentive or concession will result in identifiable, financially sufficient, and actual cost reductions based upon appropriate financial analysis and documentation required by this section.

3. If the density bonus is based all or in part on dedication of land, all of the requirements included in Section 65915(g) have been met.

4. If the density bonus, incentive, or concession is based all or in part on the inclusion of a child care facility, all of the requirements included in Section 65915(h) have been met.

5. If the incentive or concession includes mixed uses, all of the findings included in Section 65915(k)(2) can be made.

6. If a waiver or reduction of a development standard is requested, the development standard would have the effect of physically precluding the construction of the development project at the density or with the incentives or concessions permitted by Section 65915.

B. The review authority may deny a request for an incentive or concession for which the findings set forth in subsection A of this section can be made only if it makes a written finding, based upon substantial evidence, of one of the following:

1. The incentive or concession is not required to provide for affordable rents or affordable ownership costs, as provided in Section 65915(d)(1)(A); or

2. The incentive or concession would have a specific adverse impact upon public health or safety, or the physical environment, or on any real property that is listed in the California Register of Historic Resources, and there is no feasible method to satisfactorily mitigate or avoid the specific adverse impact without rendering the development unaffordable to low, very low and moderate income households. For the purpose of this subsection, “specific adverse impact” means a significant, quantifiable, direct, and unavoidable impact, based on objective, identified, written public health or safety standards, policies, or conditions, as they existed on the date that the application was deemed complete; or

3. The concession or incentive would be contrary to state or federal law.

C. The review authority may deny a request for a waiver or reduction for which the findings set forth in subsection A of this section can be made only if it makes a written finding, based upon substantial evidence, of one of the following:

1. The modification would have a specific adverse impact upon health, safety, or the physical environment, and there is no feasible method to satisfactorily mitigate or avoid the specific adverse impact without rendering the development unaffordable to low, very low and moderate income households. For the purpose of this subsection, “specific adverse impact” means a significant, quantifiable, direct, and unavoidable impact, based on objective, identified, written public health or safety standards, policies, or conditions as they existed on the date that the application was deemed complete; or

2. The modification would have an adverse impact on any real property that is listed in the California Register of Historic Resources; or

3. The waiver or reduction would be contrary to state or federal law. 252
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024.

D. The review authority may deny a density bonus, incentive, or concession that is based on the provision of child care facilities and for which the required findings can be made only if it makes a written finding, based on substantial evidence, that the city already has adequate child care facilities. (Ord. 938 § 1, 2009)

18.03.110 Successor Government Code provisions.

All references to sections of the Government Code include all successor sections.

Table 14.16.030-1 Summary of State Density Bonus Requirements The state density bonus law is codified at California Government Code Section 65915. In general, it requires the city to grant a density bonus, as well certain concessions and incentives, to qualifying residential development projects.

The following chart provides a general overview of the requirements:

Type of Units* % of Dedicated Units Density Bonus** Concessions or Incentives***
Lower Income 10% 20% 1
(1.5% increase in density bonus for every 1% of dedicated units over 10% threshold (max 35% density bonus) 20% 35% 2
30% or above 35% 3
Very Low Income 5% 20% 1
(2.5% increase in density bonus for every 1% increase in dedicated units over 5% threshold (max 35% density bonus)
10% 33% 2
11% 35%
15% or above 35% 3
Moderate Income (common
interest development****
only where all of the units
are offered for sale)
10% 5% 1
(1% increase in density bonus for each 1% increase in dedicated units over 10% threshold (max 35% density bonus)
20% 15% 2
30% 25% 3
40% or above 35% 3
* Section 65915 applies only to proposed developments of five or more units. ** Section 65915(f) defines a “density bonus” as “a density increase over the otherwise maximum allowable residential density as of the date of the application by the applicant to the city.” Section 65915(o)(2) defines “maximum allowable residential density” as “the density allowed under the zoning ordinance and land use element of the general plan, or, if a range of density is permitted, means the maximum allowable density for the specific zoning range and land use element of the general plan applicable to the project. Where the density allowed under the zoning ordinance is inconsistent with the density allowed under the land use element of the general plan, the general plan density shall prevail.”
*** A concession or incentive may be requested only if an application is also made for a density bonus, pursuant to Sections 65915(a) and 65915(d)(1). Concessions or incentives may be selected from only one category (very low, 253
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024. low, or moderate). No concessions or incentives are available for land donation or senior housing. Day care centers may have one concession or a density bonus, at the city’s option, but not both. **** Pursuant to California Civil Code Section 1351, a “common interest development” means a community apartment project, a condominium project, a planned development, and a stock cooperative.

In addition, a developer/applicant can also qualify for a mandated density bonus in the following way:

Project Threshold Density Bonus Concession or Incentive Senior Housing (not
affordable)
35 Units dedicated to
senior housing as defined
in Civil Code §§ 51.3 &

51.12 20% of senior units 0
(Ord. 938 § 1, 2009)
Sections:

18.03.010 – Purpose

18.03.020 – Definitions

18.03.030 – Application Procedures

18.03.040 – General Provisions

18.03.050 – Affordable Unit Design and Construction

18.03.060 – Regulatory Agreements

18.03.070 – Interpretation

18.03.010 – Purpose
This chapter establishes procedures to implement State Density Bonus Law, as set forth in California Government Code Sections 65915-65918, as may be amended from time to time. State Density Bonus Law provides density bonuses and other incentives to facilitate production of affordable and senior housing. This chapter also implements General Plan Housing Element policies to provide additional housing in Capitola for lower-income households, seniors, and persons with special needs.

18.03.020 – Definitions
A. State Density Bonus Law. Definitions in State Density Bonus Law apply to the terms in this chapter.

B. “Other Incentives”. As used in this chapter, the term “other incentives” includes the following:

1. Incentives and concessions (Government Code Section 65915(k)).

2. Waiver or reduction of development standards (Government Code Section 65915(e)).

3. Reduced parking ratios (Government Code Section 65915(p)).

18.03.030 – Application Procedures
A. Concurrent Request. An applicant shall request a density bonus and other incentives concurrently with the first permit application required by the City for the housing development. 254
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024.

B. Submittal Requirements. An application for a density bonus and other incentives shall be filed on the form provided by the Community Development Department, together with all required information, materials and application fees.

C. Application Review.

1. The City shall review a request for a density bonus and other incentives concurrently with the permit application required for the housing development.

2. The City shall notify the applicant whether the application is complete in a manner consistent with the timelines specified in Government Code Section 65943.

3. When the City deems the application complete, the City shall provide the applicant with a determination of the following:
a. The amount of density bonus, calculated pursuant to Government Code Section 65915(f), for which the applicant is eligible.
b. If the applicant requests a parking ratio pursuant to Government Code Section 65915(p), the parking ratio for which the applicant is eligible.
c. If the applicant requests incentives and concessions pursuant to Government Code Section 65915 (d) or waivers pursuant to Government Code Section 65915(e), whether the applicant has provided adequate information for the City to review and take action on the requested incentives and/or waivers.

D. City Action.

1. General.
a. The City shall consider a request for a density bonus and other incentives concurrently with the permit application required for the housing development. The same review authority that acts on the permit application shall also act on density bonus and other incentive request. b. For permit applications that require a public hearing, a staff report shall describe project conformance with State Density Bonus Law as demonstrated by application materials submitted pursuant to Section 18.030.040.B (Submittal Requirements).

2. Incentives and Concessions. The City shall grant an incentive or concession (Government Code Section 65915(k)) requested by the applicant unless it makes a written finding, based upon substantial evidence, of any of the following:
a. The proposed incentive or concession does not result in identifiable and actual cost reductions to provide for affordable housing costs, as defined in Health and Safety Code Section 50052.5; or for affordable rents, as defined in Health and Safety Code Section 50053. b. The proposed incentive or concession would be contrary to state or federal law; or c. The proposed incentive or concession would:
(1) Have a specific, adverse impact, as defined in Government Code Section 65589.5(2)(d), upon the public health or safety or on any real property that is listed in the California Register of Historic Resources; and
(2) There is no feasible method to satisfactorily mitigate or avoid the specific adverse impact without rendering the housing development unaffordable to low- and moderate-income households.
255
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024.

3. Waiver or Reduction in Development Standards. The City shall grant a waiver of development standards (Government Code Section 65915(e)) requested by the applicant unless it makes a written finding, based upon substantial evidence, of any of the following:
a. The proposed waiver would be contrary to state or federal law. b. The proposed waiver would have an adverse impact on any real property listed in the California Register of Historic Resources.
c. The proposed waiver would:
(1) Have a specific, adverse impact, as defined in Government Code Section 65589.5(2)(d), upon the public health or safety; and
(2) There is no feasible method to satisfactorily mitigate or avoid the specific adverse impact without rendering the housing development unaffordable to low- and moderate-income households.

4. Child Care Centers. If a child care center complies with the requirements of Government Code Section 65915(h), the decision-making body may deny a density bonus or incentive that is based on the provision of child care facilities only if it makes a written finding, based on substantial evidence, that the City already has adequate child care facilities.

5. Coastal Zone. For a housing development within the coastal zone, the review authority must find that the requested density bonus or other incentive is consistent with the certified Local Coastal Program, with the exception of density. The granting of a density bonus or an incentive shall not be interpreted, in and of itself, to require a local coastal plan amendment.

E. Appeals. Appeals of the permit decision required for the housing development shall include all requests under State Density Bonus Law.

18.03.040 – General Provisions
A. Density Bonus Calculation.

1. All density bonus calculations resulting in fractional units are rounded up to the next whole number.

2. In determining the number of affordable units required to qualify for a density bonus, units added by a density bonus are not included in the calculations.

B. One Density Bonus Allowed.

1. Except where a housing development is eligible for an additional bonus pursuant to Government Code Section 65915(v), each housing development is entitled to only one density bonus.

2. If a housing development qualifies for a density bonus under more than one category, the applicant shall identify the category under which the density bonus is requested to be granted.

C. Density Bonus Amount.

1. The applicant may accept a lesser percentage of density bonus than the housing development is entitled to, or no density bonus, but no reduction is permitted in the percentages of affordable units required by State Density Bonus Law.

2. Regardless of the number of affordable units, no housing development is entitled to a density bonus greater than what is authorized under State Density Bonus Law.

D. Inclusionary Requirement.

1. On-site units that satisfy the City’s inclusionary housing requirements in Municipal Code Chapter 18.02 256
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024. (Affordable (Inclusionary) Housing) and will be constructed concurrently with the housing development may qualify the housing development for a density bonus if those units meet the requirements of State Density Bonus Law.

2. Payment of fees in lieu of providing affordable units under Municipal Code Section 18.02.050 (In-lieu housing fees and alternative compliance options) does not qualify a housing development for a density bonus.

E. Financial Incentives.

1. Nothing in this chapter requires the provision of direct financial incentives from the City for the housing development, including, but not limited to, the provision of financial subsidies, publicly owned land, fee waivers, or waiver of dedication requirements.

2. The City, at its sole discretion, may choose to provide such direct financial incentives.

18.03.050 – Affordable Unit Design and Construction
A. Timing. Building permits, final inspections, and certificates of occupancy shall be issued concurrently for the market rate units and for all affordable units that qualified the project for a density bonus, incentive, waiver, or parking reduction.

B. Appearance and Quality.

1. Affordable units shall be comparable in exterior appearance and overall quality of construction to market rate units in the same housing development.

2. Interior finishes and amenities may differ from those provided in the market rate units, but neither the workmanship nor the products may be of substandard or inferior quality as determined by the City.

C. Unit Size. To comply with fair housing laws, the affordable units shall contain the same proportional mix of bedroom sizes as the market-rate units.

D. Access to Amenities. In mixed-income buildings, the occupants of the affordable units shall have the same access to the common entrances and to the common areas, parking, and amenities of the project as the occupants of the market-rate housing units.

E. Location within Building. Affordable units shall be located throughout a building and not isolated on one floor or to an area on a specific floor.

18.03.060 – Regulatory Agreements
A. General.

1. If a density bonus or other incentive is approved pursuant to this chapter, the applicant shall enter into a binding affordable housing agreement or restrictive covenant, as described below, with the City. This agreement or covenant shall implement State Density Bonus Law and ensure compliance with this chapter.

2. The agreement or covenant shall be in a form approved by the City Attorney and executed by the City Manager or their designee.

3. The agreement or covenant shall be binding on all future owners and successors in interest.

4. The applicant shall record the agreement or covenant against the housing development prior to final or parcel map approval, or, where a map is not being processed, prior to issuance of building permits for the housing development.
257
Item 8 C.

Capitola Municipal Code
Chapter 18.03 RESIDENTIAL DENSITY BONUS

The Capitola Municipal Code is current through Ordinance 1065, passed March 28, 2024.

B. Rental Projects: For affordable rental projects, the applicant shall enter into an affordable housing agreement with the City that:

1. Requires the continued affordability of all rental units that qualified the applicant for the density bonus or other incentive for a minimum of 55 years or a longer period of time if required by the construction or mortgage financing assistance program, mortgage insurance program, or rental subsidy program;

2. Identifies the type, size and location of each affordable unit;

3. Specifies the eligible occupants;

4. Specifies phasing of the affordable units in relation to the market-rate units; and

5. Contains other relevant provisions approved by the City Attorney.

C. For-Sale Projects.

1. For projects with affordable for-sale units, the applicant shall enter into an affordable housing agreement with the City that requires the following:
a. The initial purchasers of those for-sale units that qualified the applicant for the density bonus or other incentive shall be persons and families of lower or moderate income, as applicable; and b. If any for-sale unit is not purchased by an income-qualified household within 180 days after the issuance of the certificate of occupancy, then the unit(s) must be sold pursuant to a contract that satisfies the requirements of Revenue and Taxation Code Section 402.1(a)(10) to a qualified nonprofit housing corporation as defined in State Density Bonus Law and that the units are offered at an affordable housing cost, as that cost is defined in Health and Safety Code Section 50052.5.

2. The agreement shall contain other relevant provisions approved by the City Attorney.

3. The City shall enforce an equity sharing agreement consistent with State Density Bonus Law unless it conflicts with the requirements of another public funding source or law.

D. Market-Rate Senior Projects. For market-rate senior projects, the applicant shall enter into a restrictive covenant with the City to require the housing development to be operated as "housing for older persons" consistent with state and federal fair housing laws.

18.03.070 – Interpretation
If any portion of this chapter conflicts with State Density Bonus Law or other applicable state law, state law shall supersede this chapter. Any ambiguities in this chapter shall be interpreted to be consistent with State Density Bonus Law. Statutory references in this ordinance include successor provisions. 258
Item 8 C.
1 CITY OF CAPITOLA HOUSING ELEMENT IMPLEMENTATION

PROPOSED ZONING CODE AMENDMENTS

HOUSING ELEMENT IMPLEMENTATION
Topic (Housing
Element Program) Planning Commission Direction Amendment Location Amendment Description Affordable Housing
Overlay (1.1) 7/23/24: No comments on draft amendments Table 17.12-2; 17.36.080.H.1; 17.40.020 Removes the Affordable Housing Overlay from the City’s
Zoning Ordinance and Zoning Map
Corner Duplexes
(1.6)
2/16/24: Allow duplex on all corner lots subject to
same development standards as a single-family
home.

Table 17.16-1 Duplex homes allowed on corner parcels in the R-1 zone.

Lot Consolidation
(1.1)
2/16/24; 7/23/24: Develop incentives to encourage
lot consolidation as proposed by staff 17.20.040.K; 17.24.030.J:

Increases height and FAR for housing development
projects that consolidate adjacent housing element
opportunity sites
Replacement
Housing (1.2) 9/5/24: No comments on draft amendments 17.96.210 New section requiring no net loss of housing units and replacement of affordable units.

Alternative Housing
Types (1.5)
2/16/24; 8/15/24: SROs: Maybe promote if we can
count towards RHNA; Live/Work: not priority in
Capitola; Micro units: Promote close to transit
center; Co-housing: check this box if will please HCD;
Workforce: add as community benefit
Table 17.16-1; Table 17.76-2;

17.88; 17.160.020.C; 160.020.M
Adds definition of micro-unit, allows increased height
and FARs for micro-units, allows 0.5 parking spaces per unit for micro units; Defines cohousing and lists as
allowed use in R-1, RM, and MH zones; Adds teacher
housing as an available community benefit
Parking –
Multifamily (1.6)
2/16/24, 7/23/24:

0.5 per unit <350 sf close to transit

1.0 per unit <500 sf

1.5 per unit 500-750 sf

2.0 per unit ≥750 sf
No covered or additional guest parking
Table 17.76-2
Reduces parking require for multifamily dwelling based
on unit size
RM Density and
Development
Standards (1.6)
8/15/24: In 2025, revisit topic of increased RM
densities and supporting development standards. Chapter 17.16 No Change. 259
Item 8 C.
2 Topic (Housing
Element Program) Planning Commission Direction Amendment Location Amendment Description Parking – Senior
and Special Needs
(1.6)
2/16/24, 7/23/24: Revise required parking spaces for
senior and special needs housing uses as proposed
by staff. Consider needed guest parking
Table 17.76-2
Reduces parking required for group housing, residential care facilities, transitional housing, and senior housing Housing on
Education and
Religious Sites (1.8)
5/2/24; 8/15/24: Create site specific standards for
affordable housing projects on land owned by
religious institutions as allowed under SB 4

17.96.220
Allows affordable housing projects on land owned by
religious institutions consistent Government Code
Section 65913.16
Density Bonus (2.5,

3.6)
9/5/24: Add housing for persons with disabilities as
eligible for density bonus 18.03 Establishes density bonus procedures consistent with recent updates to state law.

Emergency Shelters
(3.1) 7/23/24: No comments on draft amendments Table 17.24-1; 17.96.030; 17.160.020.E.3:

Adds emergency shelter is “P” use in the C-C zone;
Revises standards to comply with Government Code
Section 65583(a)(4)(B); Adds statement that emergency
shelters may include other services such as navigation
centers and bridge housing.

Low Barrier
Navigation Centers
(3.1)
7/23/24: No comments on draft amendments 17.96.200
Adds statement that low barrier navigation centers are
allowed by right in areas zoned for mixed use and in
nonresidential zones permitting multifamily uses
Transitional Housing
(3.2) 7/23/24: No comments on draft amendments Table 17.16-1, 17.20-2; Table 17.24-1; 17.160.020.T.5:

Maintains transitional housing in definition of Residential Care Facilities; Changes Large Residential Care Facilities from a “C” to a “P” use in the RM and MU-V zones; Adds
Large Residential Care Facilities as an allowed use
requiring a Conditional Use Permit (“C”); Adds definition of transitional housing in glossary
Supportive Housing
(3.2) 7/23/24: No comments on draft amendments 17.96.070 Adds statement that supportive housing is allowed by
right in areas zoned for mixed use and in nonresidential zones permitting multifamily uses
Employee Housing
(3.3) 7/23/24: No comments on draft amendments 17.160.020.S.5 Adds statement that definition of single-family dwelling includes employee housing for six or fewer persons.

Large Residential
Care Facilities (3.4) 7/23/24: No comments on draft amendments Table 17.16-1, 17.20-2;

17.20.020.F; Table 17.24-1;

17.96.080
Changes Large Residential Care Facilities from a “C” to a “P” use in the RM and MU-V zones; Adds Large
Residential Care Facilities as an allowed use requiring a Conditional Use Permit (“C”); Removes Large Residential Care Facility standards
260
Item 8 C.
3 Topic (Housing
Element Program) Planning Commission Direction Amendment Location Amendment Description Reasonable
Accommodations
(3.4)
7/23/24: No comments on draft amendments 17.140.070 Revises criteria for reasonable accommodations.

Daycares (3.6) 7/23/24: No comments on draft amendments Table 17.25-1 Changes day care centers from a “C” to an “M” use Additional Zoning Code Cleanup Amendments
Topic Planning Commission Direction Amendment Location Amendment Description

MU-V, MU-N
Driveways/Curb Cuts 7/23/24: No comments on draft amendments 17.20.030.F; 17.20.040.F; 17.76.040.C.3.c Allows exception to driveway and curb cut standards in MU-V and MU-N to allow for one parking space of up to 14 feet in width. Adds cross reference in 17.76.040 to Section

17.20.030.E.6 (Driveways and Curb Cuts)
Opaque windows on
second stories
2/1/24: Clarify that opaque windows may be required
on case-by-case basis (not always mandatory) 17.16.B.11.d Opaque windows may be required by the Planning
Commission on case-by-case basis, but are not always
required
Location of Retail
Cannabis
Establishments
7/23/24, 8/15/24: Allow retail cannabis in C-C fronting 41st Avenue
Table 17.24-1;

17.24.020.D
Allow retail cannabis in C-C fronting 41st Avenue
First floor offices in
the C-R Zone 9/5/24: Support for draft amendments 17.24.020.C Expands allowed location for ground floor office uses in the C-R and C-C zoning districts
CDP Waiver or
Exclusion for
J/ADUs
7/23/24: No comments on draft amendments 17.44.090.C and 17.74

17.44.090.C: Allows for waiver of CDP in non-appealable areas for ADUs 17.74.030.E.2: Allow waiver of CDP for ADUs that meet criteria
Upper Floor Decks 2/1/24, 7/23/24:

Review of draft amendments requested 9/5/24

17.16.030.B.11;

17.48.040.B.6
Clarify 150 square feet is cumulative of all decks for FAR calculation. Allow deck on the second story at 15 feet
setback instead of 20 feet. Allow decks to project 10 feet instead of 6 feet. Allow decks in the front yard within 6 feet of interior property line instead of 10 feet. Upper story deck privacy walls should be on a case-to-case basis
changing “shall” to “may” be required by PC. Add examples of privacy screens to include opaque materials and
vegetation.

Flatwork 7/23/24: Do not create zoning permit for flatwork - No change. 261
Item 8 C.
4 Topic Planning Commission Direction Amendment Location Amendment Description Accessory Dwelling
Units: State Law
Conformance
Included in 7/23/24:

Review of draft amendments requested 9/5/24 17.74
Updates state law references, adds that front setback
deviation permitted for 800 sq. ft. ADU; Clarifies that exceptions to standards to allow for 800 sq. ft. ADU may only be minimum necessary; Updates allowed height consistent with state law.

Parking for New
SFDs
7/23/24: Require 2 parking spaces per single-family
dwelling and do not require either space to be
covered, regardless of size

17.76 Reduce maximum number of required parking spaces.

Remove covered parking requirement.

Parking for
SFD Remodels 7/23/24: No comments on draft amendments Table. 17.76-2 As required by state law, adds note that additional parking is not required for additions and remodels to single-family homes that conform with building size standards.

Signs 7/23/24: No comments on draft amendments Table 17.80-6 Reduces allow wall sign area in MU-N to match total sign area allowed in MU-N (Table 17.80-1)
Consistent
Terminology - CDD 7/23/24: No comments on draft amendments 17.84.080.C Replaces “CDD” with “community development director” for code consistency.

Historic Alteration
Permits 7/23/24: No comments on draft amendments 17.84.070.C.2 Fixes numbering error.

Historic Preservation
Incentives 7/23/24: No comments on draft amendments 17.84.090.D Permit review authority approves permit fee reimbursement when acting on permit application.

Permit Time Limits
and Extensions 7/23/24: No comments on draft amendments 17.56.080;17.156.080.A Allows the Planning Commission or City Council to establish an alternative permit expiration date when initially approving the permit. Allows the Planning Commission or City Council to approve two four-year extensions (eight years total) to permits.

Home
Occupations 7/23/24: No comments on draft amendments 17.96.040.A Allows home occupations that comply with standards by right without an administrative permit.

Wireless
Communication
Facilities
7/23/24: No comments on draft amendments 17.104 Update Federal CFR references throughout chapter.

Referral of
Applications
to Planning
Commission
7/23/24: No comments on draft amendments 17.112.090 New section stating the community development may refer any discretionary decision to the Planning Commission.

Good Standing for
Permit Review 8/15/24: No comments on draft amendments 17.112.020.C.3 Adds that City will not accept application for a property with an active code enforcement action unless correction of
violation is included as part of the proposed project.
262
Item 8 C.
5 Topic Planning Commission Direction Amendment Location Amendment Description Design Review
Process; Design
Review Committee
10/3/24: No recommended changes. In 2025,
consider augmenting the design review process with
additional public noticing for design permits which
require public hearing and third-party design advice
for additional types of development projects.

17.108; 17.120 No Change.

Glossary -
Clerestory Window 7/23/24: No comments on draft amendments 17.160.020.C Adds definition of clerestory window.

Definition –
Takeout Food
and Beverage
7/23/24: No comments on draft amendments 17.160.020.E Excludes bars and lounges from definition of takeout food and beverage establishments.

Roof Decks 7/23/24: No comments on draft amendments 17.160.020.R.9 Clarifies that roof deck is the occupied roof space located above the top story of a structure.

R-1 Garage
Setback 7/23/24: No comments on draft amendments 17.16.030.B.4 Removes minimum garage set back of 5 feet from front
building wall. Minimum 20-foot garage setback from front property line in Table 17.16-2 remains.
263
Item 8 C.

Zoning Code Amendments
Consistency with LCP Land Use Plan
The proposed Zoning Code Amendments implement programs in Capitola’s 2023-2031 Housing Element. Capitola committed to completing these amendments to comply with state housing laws. Many of these amendments locally codify existing state law, including provisions related to no net loss of housing element sites, housing on education and religious sites, emergency shelters, and special needs housing. Other amendments reduce barriers to housing production as required by state law, including barriers associated with parking requirements and small parcel sizes.

The proposed Zoning Code Amendments also address additional issues that have arisen since the Zoning Code was last updated, but which are not required by the Housing Element.

The majority of proposed Zoning Code Amendments do not change allowed development or uses in any manner that could impact coastal resources or conflict with the certified LCP.

These amendments are consistent with the certified LCP and Coastal Act. Two proposed amendments that do warrant LCP consistency discussion are the accessory dwelling unit waiver provisions and changes to required on-site parking space.

Accessory Dwelling Unit CDP Waivers
Section 17.74.030.E adds language to the accessory dwelling unit chapter allowing the City to issue a CDP waiver for a proposed accessory dwelling unit in the coastal zone, including in locations in appealable and non-appealable to the Coastal Commission. To be eligible for a waiver, the proposed accessory dwelling unit may not be in an area subject to coastal hazards, within 200 feet of a cliff edge, or in an environmentally sensitive habitat area. The City also must determine that the accessory dwelling unit would not negatively impact coastal resources, public access, or views consistent with the City’s certified Local Coastal Program.

This waiver process is consistent with the January 21, 2022 Coastal Commission memorandum on implementing new accessory dwelling unit law. This memorandum states “If a local government’s LCP includes a waiver provision, and the proposed J/ADU meets the criteria for a CDP waiver, the local government may issue a CDP waiver for the proposed J/ADU.” The memorandum further states that a waiver may be allowed for accessory dwelling units that are “sited, designed, and limited in such a way as to ensure any potential impacts to coastal resources are avoided (such as through habitat and/or hazards setbacks, provision of adequate off-street parking to ensure that public access to the coast is not impacted, etc.)”. Lastly, the memorandum states that because public hearings are not required for accessory dwelling units, CDP waivers may be appropriate in both appealable and non-appealable areas.

For the reasons above, the waiver process is consistent with the following LCP policies:
 Policy VI-2: It shall be the policy of the City of Capitola to protect, maintain and, where possible, enhance the environmentally sensitive and locally unique habitats within its coastal zone, including dedication and/or acquisition of scenic conservation easements for protection of the natural environment. All developments approved by the City within or adjacent to these areas must be found to be protective of the long-term maintenances of these habitats.
264
Item 8 C.
 Policy VII-1: It shall be the policy of the City of Capitola to adequately plan for natural hazards in new development, reduce risks to life and property, and revise all plans and Zoning Ordinances to be in conformance with all the policies of the Coastal Act relating to hazards and shoreline structures.

Parking Standards
Table 17.76-2 reduces the number of required on-site parking spaces for single-family dwellings, multifamily dwellings, senior housing, and residential care facilities. These changes were made to comply with Housing Element programs that call for the City to reduce parking requirements that constrain housing production, including housing for special needs populations.

Proposed new parking standards aim to reduce housing constraints (as required by state housing laws) while also protecting coastal access, facilitating transit service, and minimize vehicle miles traveled consistent with Coastal Act policies. New parking standards allow for the density of development permitted by the General Plan, but also require a reasonable supply of new on-site parking to maintain street parking availability for visitors. For this reason, the revised parking standards are consistent with the following LCP policies:
 Coastal Act Policy 30252: The location and amount of new development should maintain and enhance public access to the coast by (1) facilitating the provision or extension of transit service … (4) providing adequate parking facilities or providing substitute means of serving the development with public transportation, (5) assuring the potential for public transit for high intensity uses such as high-rise office buildings …  Coastal Act Policy 30253: New development shall do all of the following: … (d) Minimize energy consumption and vehicle miles traveled. (e) Where appropriate, protect special communities and neighborhoods that, because of their unique characteristics, are popular visitor destination points for recreational uses.  Policy I-1: It shall be the policy of the City of Capitola to maintain and enhance access to Capitola Beach, Village, and Wharf while maintaining and enhancing the existing character of Capitola Village and the surrounding residential areas. The intensity of new development shall be limited to the availability of parking and other alternative transportation systems, such as a shuttle bus and remote parking. 265
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Capitola City Council
Agenda Report
Meeting: November 14, 2024
From: Public Works Department
Subject: Stockton Bridge Debris Mitigation Project Update Recommended Action: Staff recommends that the City Council: 1) receive report; and 2) direct staff to utilize available funding to develop project plans/permits and solicit public feedback to rebuild Stockton Bridge to address flood risk and debris accumulation.

Background: The Stockton Avenue Bridge, constructed in 1934, is a beam bridge with three openings and two support piers. The bridge spans Soquel Creek and is the furthest downstream bridge on the Creek. Soquel Creek is prone to large woody debris, which historically causes flooding by blocking other bridges. Unlike the upstream bridges at Soquel Drive and Highway 1, the Stockton Avenue Bridge has smaller spans, increasing the risk of debris accumulation and flooding.

Due to its vulnerability, the Stockton Avenue Bridge is identified as a critical at-risk facility in the City's 2013 Local Hazard Mitigation Plan (LHMP). In 2016, a due diligence memorandum was completed to assess the potential impact of debris flow on the bridge during a catastrophic flooding event. The memorandum recommended the installation of debris fins to guide debris through the larger center span of the bridge.

The development of a debris mitigation project for the Stockton Avenue Bridge involves conducting a feasibility study and detailed site study, including a hydraulic model, evaluation of alternative debris control measures, consideration of permits, infrastructure requirements, and cost analysis. The adopted FY 2022-23 budget allocated $350,000 for the initial phase of the "Stockton Bridge Reinforcement Project." With support from State Senator John Laird, State Assembly Bill 102 was passed this summer, which allocated an additional $500,000 for this project.

On January 25, 2024, the City Council authorized a Professional Services Agreement with CSW/StuberStroeh Engineering Group, Inc. in an amount not to exceed $125,343 to conduct a comprehensive feasibility study to explore potential solutions to address debris accumulation while preserving the structural integrity, aesthetic value, and recreational use of the bridge. This study was aimed at identifying viable options to mitigate flood risks associated with large wood debris (LWD) while considering the broader environmental, economic, and community impacts.

Discussion: The Stockton Bridge Debris Mitigation Study involved comprehensive modeling and field assessments of Soquel Creek’s hydraulic behavior, bridge dynamics, and debris flow patterns during flood events. Several key factors were evaluated to ensure that each alternative could effectively reduce flood risk without negatively impacting the creek’s ecosystem or the community’s use of the area.

The following summarizes the findings of each alternative:
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1. Debris Diversion Fins – Vertical or angled fins would be installed in the creek upstream of the bridge to deflect LWD. While these are geotechnically, biologically, and structurally feasible, hydraulic analysis showed that they would raise water levels upstream, increasing flood risk.

Moreover, debris diversion fins had the most significant negative impact on aesthetics and recreational use, as they would be highly visible and disrupt the natural creek environment. 267
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2. Debris Diversion Cage – A cage structure would be installed upstream of the bridge, trapping larger debris before it reaches the piers. Hydraulically, this option performs well, but has a tendency to trap smaller debris, which can accumulate and create blockages. Debris diversion cages are also visually intrusive and have a moderate impact on recreational users of Soquel Creek, including kayakers and fishermen.
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3. Debris Diversion Piers – This option involves installing a series of piers upstream of the bridge designed to catch debris without significantly obstructing water flow. The piers were found to be geotechnically, biologically, and structurally feasible, and perform better than fins and cages in maintaining water flow. However, smaller debris accumulation still poses a concern. Despite this, diversion piers have the least impact on aesthetics and recreation compared to the other debris mitigation alternatives.

4. Debris Sweeper – A mechanical arm would sweep debris from the bridge piers during high-flow events. This is the least costly alternative but has a high likelihood of failure due to potential damage by LWD. Moreover, the effectiveness of this alternative is limited, making it a temporary and unreliable solution.

5. Bridge Replacement – Replacing the Stockton Bridge with a modern structure featuring a wider span and fewer obstructions is the most effective long-term solution for reducing flood risk. By increasing the hydraulic capacity and matching the clear span of upstream bridges, the replacement bridge would allow for better debris passage and significantly lower the flood risk.

Although the most expensive option, bridge replacement provides a permanent solution with minimal impact on the creek’s appearance and recreational activities. 269
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Hydraulic Considerations:

Each debris diversion countermeasure was carefully evaluated for its hydraulic impact. The hydraulic modeling demonstrated that debris diversion fins, while structurally sound, significantly raised upstream water surface elevations, thereby reducing the creek's ability to pass floodwaters. The diversion cage performed similarly, with smaller debris accumulating at the structure and posing a risk of blockage over time.

The debris diversion piers were determined to have the best balance between structural feasibility and maintaining hydraulic performance. Although some small debris may collect at the piers, they allow for better flow compared to the other alternatives. However, the piers still present limitations in fully addressing flood risk.

Bridge replacement emerged as the most hydraulically effective solution. By increasing the span and reducing obstructions, the replacement bridge would eliminate many flow constraints that currently lead to debris accumulation and flood risks. This alternative was the only option that fully addressed the longterm flood mitigation needs of Soquel Creek.

Cost Analysis:
 Debris Diversion Fins, Cages, and Piers ($1.6M- $2.4M) have relatively similar costs, with all options requiring substantial construction, ongoing maintenance, and potential upgrades as conditions change over time.
 Debris Sweepers ($1.4M) present the lowest upfront cost but come with a high risk of failure and frequent repair needs due to LWD impact, making it an impractical long-term solution.  Bridge Replacement ($17M-$20M), while the most expensive alternative, would require minimal ongoing maintenance once constructed and offers the greatest long-term benefits in terms of flood risk reduction.

Environmental, Aesthetic, and Recreational Impacts:

Environmental assessments were conducted to ensure that each alternative would minimize disruption to the natural ecosystem of Soquel Creek. The debris diversion fins and cages have the most significant environmental and visual impact, altering the natural landscape and affecting wildlife habitats.

Additionally, these options would interfere with the recreational use of Soquel Creek, such as kayaking and fishing.

Debris piers, while somewhat visible, have less impact on the creek’s appearance and recreational use.

However, the full bridge replacement option not only improves flood risk but also results in the least disruption to the visual and recreational experience of the creek, as it would preserve and enhance the open water flow and natural aesthetics.

Recommendation
Table 1 provides a comparison of the debris mitigation options, evaluating each alternative based on hydraulic feasibility, cost, environmental and recreational impact, and effectiveness in reducing flood risk. 270
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Table 1. Mitigation Alternatives
Option Hydraulic Feasibility Cost Environmental
Impact
Recreational
Impact
Flood Risk
Reduction
Debris Diversion
Fins
Reduces hydraulic
capacity, raises water
level
Moderate Significant visual
impact High disruption Least effective
Debris Diversion
Cage
Feasible but risks
blockage Moderate
Moderate visual
and ecological
impact
Moderate
disruption
Moderately
effective
Debris Diversion
Piers
Feasible with minimal
blockage Moderate Minimal visual impact Minimal disruption Moderately effective Debris Sweeper
Low hydraulic
effectiveness, high
failure rate
Low Minimal impact
Minimal
disruption, low
reliability
Least effective,
unreliable
Bridge
Replacement
Most effective,
improves flood
capacity
High
Minimal impact,
preserves
aesthetics
Minimal disruption Most effective
Of the presented mitigation options, bridge replacement is identified as the most effective long-term solution to mitigate flood risk along Soquel Creek. While the initial cost is high, this alternative will provide the greatest hydraulic performance, reduce flood risk permanently, and have the least environmental and aesthetic impact.

If bridge replacement is deemed financially or logistically unfeasible at this time, debris diversion piers may be considered as a secondary alternative. This option provides a reasonable level of flood risk mitigation while balancing cost and maintaining the aesthetic and recreational value of the area.

If directed, staff will proceed with the following actions:

1. Utilize available funding to initiate planning and design for the replacement of the Stockton Bridge, including cost estimation, environmental review, and structural analysis. Staff will also begin coordinating outreach efforts to ensure that stakeholder groups, residents, and other members of the community have multiple opportunities to provide input on the future plans for the bridge.

2. Using those plans pursue state and federal grant opportunities to fund bridge replacement or debris mitigation alternatives.

3. Maintain interim monitoring of debris accumulation while a permanent solution is developed.

Fiscal Impact: On August 24, 2023, the City Council accepted $500,000 in grant funds from the California Department of Water Resources (CDWR) for the Stockton Bridge Debris Mitigation Project. The adopted FY 2022-23 budget allocated $350,000 for the initial phase of the "Stockton Bridge Reinforcement Project," bringing total project funding to $850,000.

The fiscal impact of bridge replacement will be substantial, but funding opportunities exist through state and federal grants, including FEMA and infrastructure-related programs. Utilizing existing project funding to further develop bridge plans will make potential future applications for grant funding more competitive.

Regardless, staff will continue to explore available funding sources and will provide further updates as the project moves forward.

California Environmental Quality Act (CEQA): This action does not constitute a “project” pursuant to Section 15378 of the California Environmental Quality Act.

Attachments:

1. Stockton Bridge debris accumulation report
Report Prepared By: Jessica Kahn, Public Works Director 271
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Reviewed By: Julia Gautho, City Clerk
Approved By: Jamie Goldstein, City Manager
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CSWST2 | 303 Twin Dolphin Drive, 6th Floor, Redwood City, CA 94065 Stockton Avenue Bridge

BRIDGE PIER DEBRIS MITIGATION FEASIBILITY REPORT

June 28, 2024
DRAFT DOCUMENT – INTERNAL REVIEW ONLY
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THIS PAGE IS INTENTIONALLY BLANK

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PREPARED BY:
303 Twin Dolphin Drive, 6th Floor
Redwood City, CA 94065
(415) 883-9850
Summary of Version Changes.
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TABLE OF CONTENTS
INTRODUCTION ........................................................................................................................................... 1 EXISTING CONDITIONS .............................................................................................................................. 4 DEBRIS MITIGATION MEASURES ............................................................................................................. 6 Debris Diversion Fin .................................................................................................................................. 6 Debris Diversion Cage ............................................................................................................................... 6 Debris Diversion Piers ............................................................................................................................... 7 Debris Sweeper ......................................................................................................................................... 7 Bridge Replacement .................................................................................................................................. 8 ANALYSIS ..................................................................................................................................................... 9 Hydraulic Analysis ..................................................................................................................................... 9 Geotechnical Analysis ............................................................................................................................... 9 Biological Analysis ..................................................................................................................................... 9 Structural Analysis ................................................................................................................................... 10 RESULTS .................................................................................................................................................... 11 CONCLUSION ............................................................................................................................................ 16 Appendix A – Schematic Design Alternative Plans
Appendix B – Hydraulic Assessment of Debris Control Countermeasure Alternatives Appendix C – Geotechnical Assessment of Debris Control Countermeasure Alternatives Appendix D – Stockton Avenue Bridge Mitigation Project – Biological Constraints Analysis Appendix E – Stockton Avenue Bridge at Soquel Creek (Bridge No. 36C0110) Storm Debris Diversions - Structural Evaluation
Appendix F – Program Level Cost Estimates
Appendix G – Capitola Bridge Over Soquel Creek As-Built Plans Appendix H – Bridge Inspection Reports
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LIST OF FIGURES
Figure 1 Aerial Photograph of Soquel Creek and Stockton Avenue Bridge ................................................. 1 Figure 2 Western View of Stockton Avenue Bridge ...................................................................................... 2 Figure 3 Section of Existing Stockton Bridge ................................................................................................ 2 Figure 5 Debris Accumulation in Southern Span .......................................................................................... 4 Figure 6 Eastern View of Stockton Avenue Bridge ....................................................................................... 4 Figure 4 Existing Bridge Cross Section ........................................................................................................ 4 Figure 7 Collapsed Sidewalks ....................................................................................................................... 5 Figure 9 Logjam Upstream of Soquel Drive Bridge after January 1982 Storm ............................................ 5 Figure 8 Existing Pump House...................................................................................................................... 5 Figure 10 Section Debris Diversion Fin ........................................................................................................ 6 Figure 11 Section of Debris Diversion Cage ................................................................................................. 6 Figure 12 Section Debris Diversion Pier ....................................................................................................... 7 Figure 13 Section Debris Sweeper ............................................................................................................... 7 Figure 14 Preliminary Cross Section of Bridge Replacement ....................................................................... 8 Figure 15 Preliminary Longitudinal Section of Bridge Replacement ............................................................ 8

LIST OF TABLES
Table 1 Existing Condition Water Surface Elevations Upstream of Stockton Avenue Bridge ...................... 9 Table 2 Existing Condition Water Surface Elevations 50’ Upstream of Stockton Avenue Bridge ................ 9 Table 3 Debris Diversion Fin ....................................................................................................................... 11 Table 4: Debris Diversion Cage .................................................................................................................. 12 Table 5: Debris Diversion Piers................................................................................................................... 13 Table 6: Debris Sweeper ............................................................................................................................. 14 Table 7: Bridge Replacement ..................................................................................................................... 15

LIST OF ACRONYMS AND ABBREVIATIONS
ACOE United States Army Corps of Engineers
cfs Cubic Feet per Second
CCC California Coastal Commission
CDFW California Department of Fish and Wildlife
ESA Endangered Species Act
FEMA Emergency Management Agency’s
FIS Flood Insurance Study
LWD Large Woody Debris
NOAA National Oceanic Atmospheric Administration
NMFS National Marin Fisheries Services
RWQCB Regional Water Quality Control Board
USFWS United States Fish and Wildlife Services
USGS United States Geological Survey
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Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 | 1

INTRODUCTION
Stockton Avenue Bridge is located in the lower
reaches of the Soquel Creek Watershed, which
is situated between the cities of Santa Cruz and
Watsonville. The Soquel Creek watershed
drains an area of approximately 42 square
miles. The watershed is comprised of urban
development, rural residential development,
agriculture, parks and recreation, and mining
and timber harvesting. The Village, a cultural
and business center in Capitola, is located at the
terminus of Soquel Creek, where it enters the
Pacific Ocean.

Besides the State Route 1 Bridge, Stockton
Avenue Bridge is the only connection linking
east and west Capitola and serves as the
primary evacuation route for the low-lying
Capitola Village. In addition, the finish line of the
popular Wharf to Wharf race is located across
the bridge at the in the Village. Heavy storms
that occurred in January 2023 illustrated the
increased intensity or rain events occurring as a
result of climate change.

The University of California Berkeley study
“Large Woody Debris in Urban Stream
Channels: Redefining the Problem” identified
large woody debris (LWD) as an important
ecological element in Soquel Creek. LWD is
defined as a dead piece of wood that is at least
10 cm in diameter and at least one-meter long.

The Soquel Creek watershed includes rural,
agricultural and timber harvesting areas, which
generate LWD. LWD of this size and larger can
remain in the river channels for years and plays
an important role in shaping channel form and
influencing function. Larger pieces that remain in
place for long periods of time have a greater
effect on channel morphology than smaller,
transient pieces. These effects are essential in
Figure 1 Aerial Photograph of Soquel Creek and Stockton Avenue Bridge 278
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creating diverse in-stream habitats for
macroinvertebrates and fish.

LWD is often removed from urban stream
channels for flood control or road maintenance
purposes, an approach with high economic and
ecological costs and one that is largely
unsuccessful. LWD management has evolved
over the years from removal of debris to a long
term passing management approach. A LWD
passing approach would cause large wooden
logs and branches to rotate parallel with the flow
of the creek to pass beneath bridges.

The average tree length in the Soquel Creek
watershed was identified as being between 15
and 30 feet long. The narrowest clear span of
the Stockton Avenue Bridge is 10 feet. This
appears to cause buildup of debris that can span
the whole creek width and cause significant
flooding to the Capitola Village.

Figure 2 Western View of Stockton Avenue Bridge
Figure 3 Section of Existing Stockton Bridge
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The 2016 Due Diligence memorandum,
prepared by Kimley Horn, identified four
potential debris control countermeasures: debris
sweeper, debris fins, debris deflectors (cage and
pier variants) and bridge replacement. The
purpose of this report is to determine the
feasibility of each debris diversion
countermeasure with the intent of reducing flood
risk along Soquel Creek. The analysis includes
hydraulic, geotechnical, biological, structural and
programmatic level cost estimating.
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EXISTING CONDITIONS
The Stockton Avenue Bridge, built in 1934, is a
cast-in-place concrete continuous 3-span
parabolically arched box girder structure with
mild reinforcement. The bridge crosses Soquel
Creek near its outlet to the Pacific Ocean. The
span configuration is an 85-foot center span,
center of pile to center of pile, with two 25-foot
cantilevered end spans. The central clear span
width is 80 feet. The two end spans are
cantilevered from the concrete piers in Soquel
Creek and are separated from a bin abutment at
each end. An existing fifteen (15) foot concrete
walkway is located within the southern span
reducing the width of the span to ten (10) feet.

The piers are supported on reinforced concrete
pile caps and timber piles. Timber piles at the
piers are a combination of vertical piles and
longitudinally battered piles. The existing bridge
deck cross section is 42 feet wide. Figure 4
depicts the existing condition.

The existing bridge, being supported on the
timber piles, as shown on the plans, indicates
that all existing piles are installed vertically, with
battered piles in the longitudinal direction. If
existing wood piles at the creek piers are
battered transversely, perhaps as an
undocumented late design revision, they could
present a construction obstacle for new piles
adjacent to the existing piers.

The storms of January 2023 caused a portion of
the slope protection and sidewalk at the
abutments to crack and potentially collapse into
Soquel Creek. The plans developed later that
year indicate a repair of the abutment walkway
cracking and patching of concrete spalls on the
pier walls. Some of those spalls were noted in
previous bridge inspection reports. Although the
bid documents were issued in October 2023, we
have not confirmed if that construction has taken
Figure 6 Existing Bridge Cross Section
Figure 5 Eastern View of Stockton Avenue Bridge
Figure 4 Debris Accumulation in Southern Span
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place since cracking was observed in the
walkway slab beneath the south abutment, see
Figure 7.

Located on the south east side of the bridge is
an existing unused pump house, see Figure 8.

The City has requested the pump house be
removed as part of the debris mitigation
countermeasures.

Figure 9 Existing Pump House
The Stockton Avenue Bridge is the furthest
downstream bridge in the watershed, which is
known to have LWD that has historically caused
flooding by damming up bridges, specifically in
1955 and 1982 storm seasons, see Figure 9.

Upstream bridges at Soquel Drive and Highway
1 have larger spans than the Stockton Avenue
Bridge. The span of the Soquel Drive Bridge,
which was replaced in 1890, 1927, 1956 and
most recently in 2003 with the added intent to
facilitate the passage of LWD, has a span of 140
feet compared to the Stockton Avenue Bridge
center clear span of 80 feet. This creates a
higher potential than historically existed for
debris to accumulate upstream of Stockton
Avenue Bridge and cause flooding risk to low
laying areas upstream of the bridge. During the
March 18th, 2024 site visit, LWD was observed
in the eastern bridge span. Sediment
accumulated around the LWD reducing the
hydraulic capacity of the bridge.

The Capitola Local Hazard Mitigation Plan
(LHMP), updated in 2020, identifies Stockton
Avenue Bridge as a critical facility that is at high
risk for various hazards, such as debris and
mudslides, tsunamis, liquefaction potential,
beach erosion, and the 100-year flood.

Figure 7 Collapsed Sidewalks
Figure 8 Logjam Upstream of Soquel Drive Bridge
after January 1982 Storm
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DEBRIS MITIGATION MEASURES
Five (5) debris mitigation measures were
analyzed for feasibility. Refer to Appendix A for
the Schematic Design Alternative Plans.

Debris Diversion Fin
Debris fins are vertical walls extending from
bridge piers that are meant to orient large debris
to pass between existing piers. The top of the fin
can be sloping or horizontal. If sloped, larger
debris that becomes trapped by the fin may ride
up along the top, allowing smaller debris to flow
underneath.

Debris fin implementation at the Stockton
Avenue Bridge would be installed adjacent to
the existing abutments within the channel of
Soquel Creek. The eastern most fin would be
installed at an angle to minimize debris catch
between the pier and creek wall. This would
include installation of weight reinforced concrete
piers in the channel of Soquel Creek. Figure 10
illustrates the debris fin section.

Debris Diversion Cage
Debris diversion cages are meant to orient large
debris to flow under the bridge. The debris
diversion cages are comprised of a
prefabricated steel triangular cage upstream of a
bridge that are designed to orient debris such as
trees or logs so that they pass under the bridge
longitudinally. The cage may also be located
directly in front of a pier. For bridge deflectors to
work, the flow direction needs to be fairly stable.

The design of this type of system is complicated,
and physical model tests may be necessary.

Installation of a debris diversion cages at the
Stockton Avenue Bridge would be comprised of
cages at each bridge pier, placed on three
reinforced concrete piers within the Soquel
Creek channel. Figure 11 depicts the debris
cage section.

Figure 10 Section Debris Diversion Fin
Figure 11 Section of Debris Diversion Cage
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Debris Diversion Piers
Debris diversion piers are meant to
orient large debris to flow under the
bridge. The debris deflectors are
comprised of vertical poles upstream of
a bridge that are designed to orient
debris such as trees or logs so that it
passes under the bridge longitudinally.

The deflectors may also be located
directly in front of a pier. For bridge
deflectors to work, the flow direction
needs to be fairly stable. The design of
this type of system is complicated, and
physical model tests may be necessary.

Implementation of a debris diversion
piers at the Stockton Avenue Bridge
would be comprised of eleven (11) piers
at each bridge pier, placed on
reinforced concrete piers with in the
Soquel Creek channel. Figure 12
illustrates the debris pier section.

Debris Sweeper
Debris sweepers are vaned, cylinder
located in front of a pier that rotates
with the flow and “sweeps” the debris
away from the pier and into the flow
between piers. Sweepers are usually
polyethylene and float up and down so
they can move with the water surface.

Implementation at the Stockton Avenue
Bridge would include the installation of
two manufactured floating debris
sweepers adjacent to the existing piers
within the channel of Soquel Creek.

The sweepers would be installed on
reinforced concrete piers, and the
sweepers would rise and fall with the
water level of the creek. Figure 13
depicts the debris sweeper section.

Figure 12 Section Debris Diversion Pier
Figure 13 Section Debris Sweeper
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Bridge Replacement
Replacement of the Stockton Avenue Bridge
would include a 135 foot clear span bridge, with
abutments in the same location as the existing
bridge and a six (6) foot deck structure. The
replacement would widen the bridge by eight (8)
feet to 52 feet wide. The widened bridge will
accommodate the increased street section, see
Figure 7 for the proposed bridge cross section.

The widened bridge will meet current standards
and needs for all users, including vehicles,
pedestrians and bicyclists. Additionally, the
Stockton Avenue Bridge is the terminus of the
Cliff Drive, and acts as a main connection eastwest point to Capitola’s Village area. Widening the bridge will improve access across Soquel
Creek for multi-modal users. A potential layout
for the widened bridge is depicted in Figure 14.

Figure 14 Preliminary Cross Section of Bridge
Replacement
A new replacement structure could be
configured so that the new clear span structure
would mimic the existing historic character of the
bridge, incorporating such features as:
• Arched bridge soffit
• Historic railing Features
• Art Deco lighting support pedestals
• Art Deco approach pedestals at
abutments.

See Figure 15 for the proposed longitudinal
section of the replacement bridge.

Figure 15 Preliminary Longitudinal Section of Bridge Replacement 285
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ANALYSIS
Hydraulic Analysis
CSWST2 performed a hydraulic Analysis of the
Stockton Avenue Bridge under the existing
conditions and each of the five (5) debris
mitigation counter measures. The analysis
determined the impacts on the water surface
elevation upstream of Stockton Avenue Bridge
for the 100-year storm event and the average
peak lower flow storm events.

Water surface elevations (WSE) within Soquel
Creek at the Stockton Avenue Bridge were
calculated using HEC-RAS version 6.5, the
Army Corps of Engineer’s Hydrologic
Engineering Center’s River Analysis System
computer program. Use of HEC-RAS to model
channel hydraulics for the scenarios provided is
considered appropriate as the water in the
channel, at the elevations modeled, is flowing in
one direction, downstream, toward the ocean
during the flow event.

The peak flow for the 100-year storm event is
17,500 cfs in accordance with the Federal
Emergency Management Agency’s (FEMA)
Flood Insurance Study (FIS) for Santa Cruz
County, CA and Incorporated Areas, FIS No.
06087CV001C.

The peak flow for the lower-flow event of 1,200
cfs was from the United States Geological
Survey’s (USGS) website, “USGS Water Data
for the Nation”. USGS provides data retrieved
from a flow monitoring location in Soquel Creek.

Between January 2024 and March 2024 four
storms produced flows of 1,000 cfs or more in
Soquel Creek. Large woody debris was
observed to be caught below the Stockton
Avenue Bridge in February 2024 and in March
2024.

Results of the existing conditions analysis are
identified in Tables 1 and 2.

Table 1 Existing Condition Water Surface
Elevations Upstream of Stockton Avenue Bridge
Storm Event Water Surface
Elevation (feet)
Q100
(17,500 cfs)

11.29 QJan2024
(1,200 cfs)

3.96 Table 2 Existing Condition Water Surface
Elevations 50’ Upstream of Stockton Avenue
Bridge
Storm Event Water Surface
Elevation (feet)
Q100
(17,500 cfs)

15.61 QJan2024
(1,200 cfs)

4.18 See Appendix B for the Hydraulic Assessment of
Debris Control Countermeasure Alternatives.

Geotechnical Analysis
Engeo performed a review of the debris
mitigation measures, outlined in Section 3, with
regards to geotechnical capacity of the existing
bridge.

See Appendix C for the Geotechnical
Assessment of Debris Control Countermeasure
Alternatives Memorandum.

Biological Analysis
Denise Duffy & Associates Environmental
Scientist performed an environmental
assessment of conditions within and
immediately adjacent to the debris mitigation
countermeasures. The assessment included
sensitive habitats, wetlands, waters of the
US/State, special-status plans, and wildlife
species.
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The analysis includes proposed mitigation
measures to address the potential impacts that
apply to the five (5) proposed debris
countermeasures. Denise Duffy & Associates
identified four (4) potential impacts to Soquel
Creek. Below is a summary of potential
environmental impacts.

Potential Temporary and Permanent Impacts:

Impact 1. Western pond turtle is known
to occur within Soquel Creek and has a
high potential to occur within the survey
area.

Impact 2. Central California coast
steelhead and tidewater goby are known
to occur within Soquel Creek and have a
high potential to occur within the survey
area.

Impact 3. Several avian species have
the potential to nest on Stockton Bridge
and/or the trees adjacent to the bridge.

Impact 4. Soquel Creek is a navigable
waterway therefore it is considered
waters of the US and the State.

Additionally, Soquel Creek is subject to
California Department of Fish and
Wildlife (CDFW) jurisdiction under
Section 1602 of CDFG code. Impacts
associated with the installation of debris
mitigation materials or with the removal
of the existing bridge, to this sensitive
habitat, would be considered significant.

See Appendix D for the complete Stockton
Avenue Bridge Mitigation Project – Biological
Constraints Analysis which includes a
comprehensive list of suggested mitigations that
apply to each debris countermeasure.

Structural Analysis
Biggs Cardosa Associates performed and
infrastructure assessment of the five (5) debris
mitigation countermeasures.

Structurally, all of the alternatives are feasible.

The locations, or lack thereof, of potential,
additional timber piles extending upstream of the
bridge, in the footprint of the proposed
alternatives, affect the ranking of constructability
and economic preference of the alternatives.

If the channel upstream of the bridge is clear of
transversely battered piles, the Debris Sweeper
alternative is the most economical solution,
followed by the Debris Diversion Piers.

If there is a high risk that battered piles exist in
the channel upstream of the bridge, the Debris
Diversion Cage is the most economical solution
followed by a reconfigured version of the Debris
Diversion Piers.

The Debris Diversion Fins are anticipated to
have the most challenges with regard to
constructability and cost.

While Bridge Replacement is the costliest option
with the lengthier design and construction
process, it extends the life span of the bridge
another 75 years and eliminates storm debris
obstacles.

The most recent Bridge Inspection Report lists
the Stockton Avenue Bridge in Historic Bridge
Inventory Historic Status Category 2; eligible for
the office list of National Register of Historic
Places (NRHP). This means that that the bridge
has been determined eligible as a result of the
historic bridge inventory and subsequent
updates. Caltrans will need to be contacted to
obtain additional information about the Historic
Bridge Rating Sheet from the Office of Historic
Preservation or sometimes on request from the
Cultural Studies Office. There is a multi-step
process through Caltrans to determine how the
historic nature of the structure affects
replacement and what features may be
necessary for the new design.

See Appendix E for the Stockton Avenue Bridge
at Soquel Creek (Bridge No. 36C0110) Storm
Debris Diversions - Structural Evaluation.
287
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 | 11

RESULTS
The results of the analysis are outline in tables 1
to 5 below.

Table 3 Debris Diversion Fin

Analysis Type Summary of Results
Hydraulic
Storm Event WSE Upstream of Stockton
Avenue Bridge
(feet)
WSE 50’ Upstream of
Stockton Avenue Bridge
(feet)
Q100 12.82 18.11
QJan2024 5.50 6.53
Geotechnical Debris diversion fins do not impact the geotechnical capacity of the existing bridge.

Biological
Installation of Debris Diversion Fins will result in temporary and permanent impacts to Soquel Creek. The following regulatory permits will be required:
• United States Fish and Wildlife Services (USFWS) and National Marin Fisheries Services (NMFS): Section 7 of the Endangered Species Act (ESA).
• California Department of Fish and Wildlife (CDFW): Section 1602 of the California Fish and Game Code (Streambed Alternation Agreement). • United States Army Corps of Engineers (ACOE): Section 404 of the Clean Water Act (CWA) and/or Rivers and Harbor Act Section 10 Permit. • Central Coast Regional Water Quality Control Board (RWQCB):

Section 401 of the CWA.
• California Coastal Commission (CCC): Coastal Development Permit.

Structural
Tapered concrete fin walls supported on large diameter cast-in-steel shells with interlocking grade beams. Fin walls are proposed to be independent from the existing bridge and cantilevered from the large diameter piles for out-of-plane seismic forces. This alternative is feasible to construct in a single season. More discussion is merited about the possibility of transversely battered timber piles.

Functionality
Debris fins are successful in aligning debris with the waterway opening and to avoid the accumulation of debris at bridge piers. The use of the angled fin at the eastern opening will reduce the hydraulic capacity of the bridge, but deflect debris away from the smallest clear span. Debris fins have failed under high lateral forces of trapped debris.

Recreational
User Impacts
Debris fins would block the eastern clear span. Recreational water users traversing upstream along Soquel Creek could be blocked and unable to turn around. The fin could be a hazard to users and require buoys to warn users to avoid them.

Aesthetic
Impacts
Debris fins would be free standing walls interrupting the view of the bridge from the small parks and residents who live in the area.

Maintenance Debris fins require maintenance for debris removal. If debris is not removed, flow conveyance is reduced.

Program Level
Cost Estimate
$1,600,000 to $1,800,000
288
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 | 12
Table 4: Debris Diversion Cage

Analysis Type Summary of Results
Hydraulic
Storm Event WSE Upstream of Stockton
Avenue Bridge
(feet)
WSE 50’ Upstream of
Stockton Avenue Bridge
(feet)
Q100 11.72 14.20
QJan2024 4.02 4.18
Geotechnical Debris diversion cages do not impact the geotechnical capacity of the existing bridge.

Biological
Installation of Debris Diversion Cages will result in temporary and permanent impacts to Soquel Creek. The following regulatory permits will be required:
• USFWS and NMFS: Section 7 of the Endangered Species Act (ESA). • CDFW: Section 1602 of the California Fish and Game Code (Streambed Alternation Agreement).
• ACOE: Section 404 of the Clean Water Act (CWA) and/or Rivers and Harbor Act Section 10 Permit.
• Central Coast RWQCB: Section 401 of the CWA.
• CCC: Coastal Development Permit.

Structural
Debris cages are proposed to be independent from the existing bridge and cantilevered from the large diameter piles for out-of-plane seismic forces. This alternative is more likely to be feasible to construct in a single season because of the ability to prefabricate the cages prior to the construction window. The possibility of transversely battered timber piles is less of a concern with this system as the pile configuration avoids likely locations for existing battered piles.

Functionality
Debris diversion cages are actually similar in function to fins, in that they align debris with the waterway opening to avoid the accumulation of debris at bridge piers. In the case of the Soquel Creek the flow direction is steady and alignment of the cage can be accurately placed to orient LWD to the large open span.

Debris diversion cages are at risk of collecting smaller debris within the configuration that can build up and cause LWD to become trapped at the apex of the pier placement.

Recreational
User Impacts
Debris diversion cages would nearly completely block the eastern clear span.

Recreational water users traversing upstream along Soquel Creek could be blocked and unable to turn around. The cage could be a hazard to users and require buoys to warn users to avoid them.

Aesthetic
Impacts
Debris diversion cages would be nearly half the bridge height and interrupt the view of the bridge from the small parks and residence who live in the vicinity.

Maintenance
In the event LWD accumulates in the narrow eastern span (10-feet wide) of the bridge, it would require removal to avoid reducing the hydraulic capacity of the bridge. The debris diversion cages may require annual maintenance to remove any buildup of small debris.

Program Level
Cost Estimate
$1,400,000 to $1,600,000
289
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 | 13
Table 5: Debris Diversion Piers
Analysis Type Summary of Results
Hydraulic
Storm Event WSE Upstream of Stockton
Avenue Bridge
(feet)
WSE 50’ Upstream of
Stockton Avenue Bridge
(feet)
Q100 11.72 13.90
QJan2024 4.02 4.17
Geotechnical Debris diversion piers do not impact the geotechnical capacity of the existing bridge.

Biological
Installation of Debris Diversion Piers will result in temporary and permanent impacts to Soquel Creek. The following regulatory permits will be required:
• USFWS and NMFS: Section 7 of the Endangered Species Act (ESA). • CDFW: Section 1602 of the California Fish and Game Code (Streambed Alternation Agreement).
• ACOE: Section 404 of the Clean Water Act (CWA) and/or Rivers and Harbor Act Section 10 Permit.
• Central Coast RWQCB: Section 401 of the CWA.
• CCC: Coastal Development Permit.

The increased number of piers proposed for the debris piers may result in increased mitigation required by the regulatory agencies.

Structural
It is likely that steel shell pile extensions or cast-in-place pole extensions may be preferable to embedded steel sections. This alternative is feasible to construct in a single season. While this pile layout is less likely for potential pile conflicts it is not as favorable as debris diversion cage. More discussion is merited about the possibility of transversely battered timber piles.

Functionality
Debris diversion piers are similar in function to debris fins, in that they align debris with the waterway opening to avoid the accumulation of debris at bridge piers. In the case of the Soquel Creek the flow direction is steady and alignment of the poles can be accurately determined to orient LWD to the large open span. Debris diversion piers are at risk of collecting smaller debris and twigs within the configuration that can build up and cause LWD to become trapped at the apex of the pier placement.

Recreational
User Impacts
Debris diversion piers would nearly completely block the eastern clear span. The piers could be a hazard to users and require buoys to warn users to avoid them.

Aesthetic
Impacts
Debris diversion piers would be round monoliths of nearly half the bridge height and interrupt the view of the bridge from the small parks and residence who live in the vicinity.

Maintenance
In the event LWD accumulates in the narrow eastern span (10-feet wide) of the bridge, it would require removal to avoid reducing the hydraulic capacity of the bridge. The debris diversion piers may require annual maintenance to remove any buildup of small debris.

Program Level
Cost Estimate
$2,100,000 to $2,400,000
290
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 | 14
Table 6: Debris Sweeper
Analysis Type Summary of Results
Hydraulic
Storm Event
WSE Upstream of
Stockton Avenue Bridge
(feet)
WSE 50’ Upstream of
Stockton Avenue Bridge
(feet)
Q100 11.66 14.17
QJan2024 4.01 4.18
Geotechnical Debris sweepers do not impact the geotechnical capacity of the existing bridge.

Biological
Installation of Debris Sweepers will result in temporary and permanent impacts to Soquel Creek. The following regulatory permits will be required:
• USFWS and NMFS: Section 7 of the Endangered Species Act (ESA). • CDFW: Section 1602 of the California Fish and Game Code (Streambed Alternation Agreement).
• ACOE: Section 404 of the Clean Water Act (CWA) and/or Rivers and Harbor Act Section 10 Permit.
• Central Coast RWQCB: Section 401 of the CWA.
• CCC: Coastal Development Permit.

The reduced number of piers proposed for the debris sweepers may result in decreased mitigation required by the regulatory agencies.

Structural
The debris sweeper assemblies are proposed to be independent from the existing bridge and cantilevered from a large diameter pile for operational and seismic forces. This alternative is feasible to construct in a single season as there are fewer piles and the main sweeper is prefabricated. More discussion is merited about the possibility of transversely battered timber piles. A sweeper of this type may be difficult to obtain.

Functionality
Debris sweepers are intended to buffer the bridge itself from impact and steer debris around the structures. The sweepers rotate freely, they shed debris, reducing the likelihood of accumulation. Debris sweepers have a high failure rate.

Failures are typically due to clogging, being crushed or disturbed by LWD.

Failures increase potential for debris accumulation.

Recreational
User Impacts
Debris sweepers float up and down with the level of the creek and in small waves.

Recreational water users run the risk getting close to the pole, grab under or on top of the sweeper and get their hand caught.

Aesthetic
Impacts
Debris sweepers would two (2) round monoliths of nearly half the bridge height and interrupt the view of the bridge from the small parks and residence who live in the vicinity. The debris sweeper would have the least visual interruption of the countermeasures install at the existing bridge.

Maintenance
In the event LWD accumulates in the narrow eastern span (10-feet wide) of the bridge, it would require removal to avoid reducing the hydraulic capacity of the bridge.

Program Level
Cost Estimate
$1,300,000 to $1,400,000
291
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 | 15
Table 7: Bridge Replacement
Analysis Type Summary of Results
Hydraulic
Storm Event
WSE Upstream of
Stockton Avenue Bridge
(feet)
WSE 50’ Upstream of
Stockton Avenue Bridge
(feet)
Q100 11.91 12.20
QJan2024 4.02 4.02
Geotechnical A foundation exploration, in accordance with Caltrans, shall be performed.

Biological
Installation of a new Bridge will result in temporary impacts to Soquel Creek. The following regulatory permits will be required:
• USFWS and NMFS: Section 7 of the Endangered Species Act (ESA). • CDFW: Section 1602 of the California Fish and Game Code (Streambed Alternation Agreement).
• ACOE: Section 404 of the Clean Water Act (CWA) and/or Rivers and Harbor Act Section 10 Permit.
• Central Coast RWQCB: Section 401 of the CWA.
• CCC: Coastal Development Permit.

No new impacts to the channel of Soquel Creek are proposed, existing structures are proposed for removal. Therefore, bridge replacement may result in reduced mitigation requirements from Regulatory agencies.

Structural
The bridge replacement option is a viable option for debris mitigation as the proposed bridge structure clear spans the creek, eliminating the two piers in the water and creating a more favorable hydraulic channel. In addition, the Stockton Bridge is a critical link for emergency services / response for the coastal community. The closest alternative crossing of Soquel Creek is Highway 1. The existing bridge is 90 years old and highly likely to be seismically deficient.

The bridge sufficiency rating from Caltrans Inspection Reports is 60.6. That rating would likely qualify for rehabilitation funding assistance, but additional studies would need to be performed for replacement funding assistance. The deck rating is poor due to excessive transverse cracking, but the overall superstructure is rated as fair.

Functionality
The clear span opening of a bridge replacement is similar in size to the upstream bridges and would allow LWD to freely pass beneath the bridge and not cause debris build up.

Recreational
User Impacts
Bridge replacement will result in the most accessible debris countermeasure and create the most opportunities for recreational water users.

Aesthetic
Impacts
Bridge replacement would result in the loss of the 1934 construction with art deco façade. A replacement structure could be configured in a contemporary interpretation that mimics the existing historic character of the bridge.

Maintenance
Routine bridge inspections and maintenance, similar to inspection and maintenance currently being performed for the existing Stockton Avenue Bridge, would be required. Note, that a bridge replacement would add 75 years to the life span of the bridge crossing.

Program Level
Cost Estimate
$17,800,000 to $19,800,000
292
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 | 16

CONCLUSION
All five (5) debris counter measures are
considered geotechnical, biologically, and
structurally feasible. However, the purpose of
this report is to determine the feasibility of each
debris diversion countermeasure with the intent
of reducing flood risk along Soquel Creek.

Debris Diversion Fins: This alternative is
geotechnical, biologically and structurally
feasible. However, hydraulically, it results in
significant increase in water surface elevation
upstream of the bridge. Debris fins have a
similar cost to debris diversion cages and piers.

Debris fins are the least effective in reducing
flood risks along Soquel Creek due to the
reduction in hydraulic capacity at the bridge.

Debris diversion fins result in the most
significant recreational user and aesthetic
impacts of alternatives maintaining the existing
bridge.

Debris Diversion Cage: This alternative is
hydraulically, geotechnical, biologically and
structurally feasible. Debris cages have a similar
cost to debris diversion fins and piers. Debris
diversion cages are at risk of collecting smaller
debris within the configuration that can build up
and cause LWD to become trapped at the apex
of the pier placement. Debris cages result in
recreational user and aesthetic impacts.

Debris Diversion Piers: This alternative is
hydraulically, geotechnical, biologically and
structurally feasible. Debris piers have a similar
cost to debris diversion fins and cages. Debris
diversion piers are at risk of collecting smaller
debris and twigs within the configuration that can
build up and cause LWD to become trapped at
the apex of the pier placement. Debris piers
result in the least recreational user and aesthetic
impacts.

Debris Sweeper: This alternative is
hydraulically, geotechnical, biologically and
structurally feasible. Debris sweepers are the
least costly alternative, but are at risk of being
ineffective at reducing flooding along Soquel
Creek due to the high failure rate due to
crushing from LWD. Debris sweepers result in
the least recreational user and aesthetic impacts
of alternatives maintaining the existing bridge.

Bridge Replacement: This alternative is
hydraulically, geotechnical (with supplemental
studies), biologically and structurally feasible.

Bridge replacement is the most costly
alternative, but will be most effective in reducing
flood risks along Soquel Creek by similarly
matching the clear span opening to the
upstream bridges. Bridge replacement also
results in the least recreational user and
aesthetic impacts.
293
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 |
Appendix A – Schematic Design Alternative Plans

294
Item 9 A.
1 inch = 10 ft.
10 8.6±'

ANGLE FIN TO MINIMIZE
DEBRIS CATCH BETWEENPIER AND CREEK WALL.

SOQUEL CREEK

FLOW DIRECTION

CREEK WALL CREEK WALL

EDGE EXISTINGBRIDGE DECK

EDGE EXISTINGBRIDGE DECK

SOQUEL CREEK

FLOW DIRECTION

TO PACIFIC OCEAN

CREEK WALL CREEK WALL

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

CREEK WALLCONTINUES

UNDER BRIDGE

PIERUNDER BRIDGE

S T O C K T O N A V E

PIERUNDER BRIDGE

91.3±'

79.8±'

26.0±'
20'
20'
FOOTING, TYP.

FIN, TYP.

PIER, TYP.

22.4±'
85'

CENTERLINE PIER TO CENTERLINE PIER
&

CENTERLINE END FIN TO CENTERLINE END FIN PIER UNDER
BRIDGE

PIER UNDERBRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

APPROXIMATE LOCATION

OF EXISTING CREEK WALL

UNDER BRIDGE

REINFORCED
CONCRETE PIER, TYP.

REINFORCED

CONCRETE
FOOTING, TYP.

REINFORCED

CONCRETE
FIN WALL, TYP.

ANGLE FIN TO MINIMIZE
DEBRIS CATCH BETWEENPIER AND CREEK WALL.

EXISTING
TIMBER PILES, TYP.
25' 25'

PIER FOOTING,
TYP.
20'

PIER UNDERBRIDGE

REINFORCED
CONCRETE PIER, TYP.

REINFORCED

CONCRETE
FOOTING, TYP.

REINFORCED

CONCRETE
FIN WALL, TYP.

EXISTING
TIMBER PILES, TYP.
(DIAGRAMMATICALLY
SHOWN)

CONCRETE FIN

WALL AND FOUNDATION
BEYOND IN DASHED, TYP..

PIER FOOTING

SOQUEL CREEK

FLOW DIRECTION

APPROXIMATE

CREEK BOTTOM
SDA1
DEBRIS DIVERSION FIN 1" = X'
P:\Shared\Projects\2023\2300338 Capitola Stockton Bridge Replacement\DWG\Exhibits\Alternatives.dwg 06/21/2024 - 11:51 AM nankk 1:1 Sheet Plan File: Project Number: 2300338 Prepared Under the Direction of: CITY OF CAPITOLA STOCKTON AVENUE BRIDGE MITIGATION State County City California Santa Cruz Capitola
Rev Date Description Designed Drawn Checked
Scale:

Date: 04/18/2024
303 TWIN DOLPHIN DRIVE
REDWOOD CITY, CA 94065
©2024
ENGINEERING | LANDSCAPE ARCHITECTURE
SURVEYING | URBAN PLANNING
415.883.9850
WWW.CSWST2.COM

SCHEMATIC DESIGN ALTERNATIVE
PLAN

UPSTREAM ELEVATION WESTWARD ELEVATION
SCALE: 1"=10'SCALE: 1"=10' SCALE: 1"=10'
295
Item 9 A.
1 inch = 10 ft.
10 76±'

S T O C K T O N A V E

SOQUEL CREEK

FLOW DIRECTION

CREEK WALL CREEK WALL

EDGE EXISTING BRIDGE DECK

EDGE EXISTINGBRIDGE DECK

SOQUEL CREEK

FLOW DIRECTION

TO PACIFIC OCEAN

CREEK WALL CREEK WALL

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

CREEK WALLCONTINUES

UNDER BRIDGE

PIERUNDER BRIDGE

PIERUNDER BRIDGE
7 84.5±' .8±' 26.9±'

8.9'
TYP.

23.8 ±'
TYP
.

DEBRIS DEFLECTOR CAGE FRAME, TYP.

6.6±' 20.8±'
25' 85' 25'
85'

CENTERLINE PIER TO CENTERLINE PIER
&

CENTERLINE DEBRIS CAGE TO CENTERLINE DEBRIS CAGE PIER UNDER BRIDGE PIER UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

APPROXIMATE LOCATION

OF EXISTING CREEK WALL

UNDER BRIDGE

REINFORCED
CONCRETE PIERS, TYP.

EXISTING
TIMBER PILES, TYP.
25' 25'
DEBRIS DEFLECTOR CAGE FRAME:

WELDED 6"x6" GALVANIZED
STEEL SQUARE BAR, TYP.

22.3'±

PIER UNDERBRIDGE

REINFORCED
CONCRETE PIER, TYP.

GALVANIZED STEEL

POST EMBEDDED IN
CONCRETE PIER.

EXISTING
TIMBER PILES, TYP.
(DIAGRAMMATICALLY
SHOWN)

PIER FOOTING

SOQUEL CREEK

FLOW DIRECTION

APPROXIMATE

CREEK BOTTOM
DEBRIS DEFLECTOR CAGE FRAME:

WELDED 6"x6" GALVANIZED STEEL SQUARE BAR

10.5±'

23.8±'
SDA2
1" = X'
P:\Shared\Projects\2023\2300338 Capitola Stockton Bridge Replacement\DWG\Exhibits\Alternatives.dwg 06/21/2024 - 11:52 AM nankk 1:1 Sheet Plan File: Project Number: 2300338 Prepared Under the Direction of: CITY OF CAPITOLA STOCKTON AVENUE BRIDGE MITIGATION State County City California Santa Cruz Capitola
Rev Date Description Designed Drawn Checked
Scale:

Date: 04/18/2024
303 TWIN DOLPHIN DRIVE
REDWOOD CITY, CA 94065
©2024
ENGINEERING | LANDSCAPE ARCHITECTURE
SURVEYING | URBAN PLANNING
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DEBRIS DIVERSION CAGE

SCHEMATIC DESIGN ALTERNATIVE
PLAN

UPSTREAM ELEVATION WESTWARD ELEVATION
SCALE: 1"=10'SCALE: 1"=10' SCALE: 1"=10'
296
Item 9 A.
1 inch = 10 ft.
10 85±'

S T O C K T O N A V E

SOQUEL CREEK

FLOW DIRECTION

CREEK WALL CREEK WALL

EDGE EXISTINGBRIDGE DECK

EDGE EXISTINGBRIDGE DECK

SOQUEL CREEK

FLOW DIRECTION

TO PACIFIC OCEAN

CREEK WALL CREEK WALL

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

CREEK WALLCONTINUES

UNDER BRIDGE

PIERUNDER BRIDGE

PIERUNDER BRIDGE

7.6±' 27.0±'
FOOTING AS NEEDED, TYP.
25'±
TYP.

20.9±'

6.7±'

76.5±'

8.5±'
CONCRETE PIER, TYP.

GALVANIZED STEEL PIER POLE, TYP.
25' 25' 85'
85'

CENTERLINE BRIDGE PIER TO CENTERLINE BRIDGE PIER
&

CENTERLINE TO CENTERLINE

OF PIER ARRANGEMENTS BRIDGE SUPPORT PIER UNDER BRIDGE BRIDGE SUPPORT PIER UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

APPROXIMATE LOCATION

OF EXISTING CREEK WALL

UNDER BRIDGE

REINFORCED
CONCRETE PIERS, TYP.

PIER POLESEMBEDDED IN

CONCRETE PIERS,
TYP.

GALVANIZEDSTEEL PIER POLES, TYP..

EXISTING
TIMBER PILES, TYP.
25' 25'
25'

BRIDGE SUPPORTPIER UNDERBRIDGE

REINFORCED
CONCRETE PIER, TYP.

REINFORCED

CONCRETE
FOOTING, TYP.

EXISTING
TIMBER PILES, TYP.
(DIAGRAMMATICALLY
SHOWN)

PIER FOOTING

SOQUEL CREEK

FLOW DIRECTION

APPROXIMATE

CREEK BOTTOM
SDA3
1" = X'
P:\Shared\Projects\2023\2300338 Capitola Stockton Bridge Replacement\DWG\Exhibits\Alternatives.dwg 06/21/2024 - 11:53 AM nankk 1:1 Sheet Plan File: Project Number: 2300338 Prepared Under the Direction of: CITY OF CAPITOLA STOCKTON AVENUE BRIDGE MITIGATION State County City California Santa Cruz Capitola
Rev Date Description Designed Drawn Checked
Scale:

Date: 04/18/2024
303 TWIN DOLPHIN DRIVE
REDWOOD CITY, CA 94065
©2024
ENGINEERING | LANDSCAPE ARCHITECTURE
SURVEYING | URBAN PLANNING
415.883.9850
WWW.CSWST2.COM

DEBRIS DIVERSION PIERS

SCHEMATIC DESIGN ALTERNATIVE
PLAN

UPSTREAM ELEVATION WESTWARD ELEVATION
SCALE: 1"=10'SCALE: 1"=10' SCALE: 1"=10'
297
Item 9 A.
1 inch = 10 ft.
10 85'

S T O C K T O N A V E

SOQUEL CREEK

FLOW DIRECTION

CREEK WALL CREEK WALL

EDGE EXISTINGBRIDGE DECK

EDGE EXISTINGBRIDGE DECK

SOQUEL CREEK

FLOW DIRECTION

TO PACIFIC OCEAN

CREEK WALL CREEK WALL

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

CREEK WALLCONTINUES

UNDER BRIDGE

PIERUNDER BRIDGE

PIERUNDER BRIDGE
MANUFACTURED FLOATINGDEBRIS SWEEPER, TYP.

ESTIMATED OUTER DIAMETER: 3'

25.4±' 10.4±'

4.5±
'
85'
CENTERLINE EX. BRIDGE PIER TO EX. BRIDGE PIER
&

CENTERLINE SWEEPER TO CENTERLINE SWEEPER PIER UNDER
BRIDGE

PIER UNDERBRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

APPROXIMATE LOCATION

OF EXISTING CREEK WALL

UNDER BRIDGE

REINFORCED
CONCRETE PIER, TYP.

EXISTING
TIMBER PILES, TYP.

GALVANIZED STEEL

POST EMBEDDED IN
CONCRETE PIER.

MANUFACTURED FLOATING DEBRIS SWEEPER.RISES AND FALLS WITH WATER LEVEL. 25' 25'

PIER FOOTING,
TYP.

4.5'±

PIER UNDERBRIDGE

REINFORCED
CONCRETE PIER, TYP.

GALVANIZED STEEL

POST EMBEDDED IN
CONCRETE PIER.

EXISTING
TIMBER PILES, TYP.
(DIAGRAMMATICALLY
SHOWN)
MANUFACTURED FLOATINGDEBRIS SWEEPER.

PIER FOOTING

SOQUEL CREEK

FLOW DIRECTION

APPROXIMATE

CREEK BOTTOM
SDA4
1" = X'
P:\Shared\Projects\2023\2300338 Capitola Stockton Bridge Replacement\DWG\Exhibits\Alternatives.dwg 06/21/2024 - 11:54 AM nankk 1:1 Sheet Plan File: Project Number: 2300338 Prepared Under the Direction of: CITY OF CAPITOLA STOCKTON AVENUE BRIDGE MITIGATION State County City California Santa Cruz Capitola
Rev Date Description Designed Drawn Checked
Scale:

Date: 04/18/2024
303 TWIN DOLPHIN DRIVE
REDWOOD CITY, CA 94065
©2024
ENGINEERING | LANDSCAPE ARCHITECTURE
SURVEYING | URBAN PLANNING
415.883.9850
WWW.CSWST2.COM

DEBRIS DIVERSION SWEEPER

SCHEMATIC DESIGN ALTERNATIVE
PLAN

UPSTREAM ELEVATION WESTWARD ELEVATION
SCALE: 1"=10'SCALE: 1"=10' SCALE: 1"=10'
298
Item 9 A.
1 inch = 10 ft.
10 52'
PROPO
SED
WIDTH

EDGE BRIDGE DECK/
OUTSIDE EDGE OF RAIL.

MATCH EDGE OFEXISTING BRIDGE

S T O C K T O N A V E
8'
SID
E-
WA
LK
5 '
B
IK
E
L
A
N
E
12'
TRAVE
LLANE
12'
TRAVE
LLANE
5 '
B
IK
E
L
A
N
E
8'
SID
E-
WA

LKEDGE DECK/ OUTSIDE
EDGE OF RAIL OFEXISTING BRIDGE.

44.17'

EXISTIN
G
WIDTH
EDGE DECK/ OUTSIDEEDGE OF RAIL OFPROPOSED BRIDGE.

SOQUEL CREEK

FLOW DIRECTION

CREEK WALL CREEK WALL

SOQUEL CREEK

FLOW DIRECTION

TO PACIFIC OCEAN

CREEK WALL CREEK WALL

FACE OF

ABUTMENT

UNDER BRIDGE

FACE OF

ABUTMENT

UNDER BRIDGE

CREEK WALLCONTINUES

UNDER BRIDGE

PIERUNDER BRIDGE
(DEMO)

PIERUNDER BRIDGE
(DEMO)

4.8%

4.8%

MATCH EX

ELEVATION

MATCH EX

ELEVATION
135'±

CLEAR SPAN

REMOVE PIER UNDER BRIDGE

ABOVE FOOTING, TYP, EXISTING AND PROPOSED

FACE OF

ABUTMENT

EXISTING AND

PROPOSED

FACE OF

ABUTMENT

APPROXIMATE LOCATION

OF EXISTING CREEK WALL

UNDER BRIDGE EXISTING TIMBER PILES
TO REMAIN, TYP.

PIER FOOTING,

TO BE DETERMINED WHETHER TO
REMOVE OR TO REMAIN, TYP.

MATCH EX

PAVEMENTELEVATION

MATCH EXPAVEMENTELEVATION

EXISTING DECKELEVATION,
APPROXIMATE.

PROPOSED DECKELEVATION,
APPROXIMATE.
6'

BRIDGE SOFFIT,
APPROXIMATE.

BRIDGE RAIL /BARRIER

ARCHITECTURAL AND

LIGHTING ELEMENTS,
ETC., TO BE DETERMINED.

4.8%

4.8%
SDA5.1
1" = X'
P:\Shared\Projects\2023\2300338 Capitola Stockton Bridge Replacement\DWG\Exhibits\Alternatives.dwg 06/21/2024 - 11:55 AM nankk 1:1 Sheet Plan File: Project Number: 2300338 Prepared Under the Direction of: CITY OF CAPITOLA STOCKTON AVENUE BRIDGE MITIGATION State County City California Santa Cruz Capitola
Rev Date Description Designed Drawn Checked
Scale:

Date: 04/18/2024
303 TWIN DOLPHIN DRIVE
REDWOOD CITY, CA 94065
©2024
ENGINEERING | LANDSCAPE ARCHITECTURE
SURVEYING | URBAN PLANNING
415.883.9850
WWW.CSWST2.COM

CLEAR SPAN BRIDGE

SCHEMATIC DESIGN ALTERNATIVE
PLAN

UPSTREAM ELEVATION
SCALE: 1"=10'SCALE: 1"=10'
299
Item 9 A.

45.17'

EXISTING BRIDGE AND PIER UNDERBRIDGE (TO BE REMOVED)

EXISTING
TIMBER PILES, TYP.
(DIAGRAMMATICALLY
SHOWN)

TO REMAIN

PIER FOOTING

TO BE DETERMINED

WHETHER TO DEMO OR TO REMAIN

SOQUEL CREEK

FLOW DIRECTION

APPROXIMATE

CREEK BOTTOM

SOQUEL CREEK

FLOW DIRECTION

APPROXIMATE

CREEK BOTTOM

NEW BRIDGE

CLEAR SPAN

NO PIERS
52'

44.17'

EXISTING
52'

PROPOSED
6'
SIDEWALK
8'
SIDEWALK
5'
BIKE
LANE
12'
TRAVEL
LANE
1'
RAIL/

BARRIER
12'
TRAVEL
LANE
5'
BIKE
LANE
8'
SIDEWALK
1'
RAIL/

BARRIER
4'±
BIKE
LANE
11'±
TRAVEL
LANE
11'±
TRAVEL
LANE
4'±
BIKE
LANE
6'
SIDEWALK

NEW BRIDGE

EXISTING BRIDGE
(REMOVE)
1 inch = 20 ft.
20 S T O C K T O N A V E
52'

MATCH EDGE OFEXISTING BRIDGE

44.17'

EDGE OFPROPOSED BRIDGE

EDGE OFEXISTING BRIDGE

CONFORM TO EXISTINGCURB, GUTTER, SIDEWALK
& BIKE LANE STRIPING.

CONFORM TO
EXISTING STRIPING.

CONFORM TO EXISTINGCURB, GUTTER, SIDEWALK& BIKE LANE STRIPING.

WALKWAY AND RAMPING

IMPROVEMENTS TO PARK
TO BE DETERMINED.

REMOVE ABANDONEDPUMP STATION HOUSING

WALKWAY AND RAMPING

IMPROVEMENTS TO PARK
TO BE DETERMINED.

CONFORM TO EXISTINGCURB, GUTTER, SIDEWALK
& BIKE LANE STRIPING.

CONFORM TO
EXISTING STRIPING.

CONFORM TO EXISTINGCURB, GUTTER, SIDEWALK
& BIKE LANE STRIPING.
147'

REPLACE BRIDGE

SOQUEL CREEK

FLOW DIRECTION

SOQUEL CREEK

FLOW DIRECTION

TO PACIFIC OCEAN
A
AB
B

45.1 7'
SDA5.2
1" = X'
P:\Shared\Projects\2023\2300338 Capitola Stockton Bridge Replacement\DWG\Exhibits\Alternatives.dwg 06/21/2024 - 11:56 AM nankk 1:1 Sheet Plan File: Project Number: 2300338 Prepared Under the Direction of: CITY OF CAPITOLA STOCKTON AVENUE BRIDGE MITIGATION State County City California Santa Cruz Capitola
Rev Date Description Designed Drawn Checked
Scale:

Date: 04/18/2024
303 TWIN DOLPHIN DRIVE
REDWOOD CITY, CA 94065
©2024
ENGINEERING | LANDSCAPE ARCHITECTURE
SURVEYING | URBAN PLANNING
415.883.9850
WWW.CSWST2.COM

CLEAR SPAN BRIDGE

SCHEMATIC DESIGN ALTERNATIVE
PLAN

SECTION A SECTION B
SCALE: 1"=20'
SCALE: 1"=10' SCALE: 1"=10'
300
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Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 |
Appendix B – Hydraulic Assessment of Debris Control Countermeasure Alternatives

301
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Adaptive Solutions for Resilient Designs
303 Twin Dolphin Drive
Redwood City, CA 94065
415.883.9850
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Berkeley | Novato | Petaluma | Pleasanton | Redwood City | Richmond

MEMORANDUM
DATE: June 28, 2024 FILE: 2300338
TO: Julia Harberson
FROM: Kristine Pillsbury and Brianna Bright
RE: STOCKTON AVENUE BRIDGE DEBRIS MITIGATION FEASIBILITY

HYDRAULIC ASSESSMENT OF DEBRIS COUNTERMEASURE ALTERNATIVES

PRELIMINARY RESULTS
This memorandum is prepared to provide a summary of the findings of the hydraulic assessment of the debris countermeasure alternatives proposed for the Stockton Avenue Bridge in Capitola, California.

This memorandum includes the following Attachments:

Attachment 1 – HEC-RAS Model Results Tables
Attachment 2 – HEC-RAS Model Cross Section Plots
Introduction
Stockton Avenue Bridge is located in the lower reaches of the Soquel Creek Watershed, which is situated between the cities of Santa Cruz and Watsonville. The Soquel Creek watershed drains an area of approximately 42 square miles. The watershed is comprised of urban development, rural residential development, agriculture, parks and recreation, and mining and timber harvesting.

The University of California Berkeley study “Large Woody Debris in Urban Stream Channels:

Redefining the Problem” identified large woody debris (LWD) as an important ecological element in Soquel Creek. LWD is defined as a dead piece of wood that is at least 10 cm in diameter and at least one-meter long. The Soquel Creek watershed includes rural, agricultural and timber harvesting areas, which generate LWD. LWD of this size and larger can remain in the river channels for years and play an important role in shaping channel form and influencing function. However, when LWD accumulates around obstructions in the channel, capacity for conveyance is be reduced, leading to flooding of areas adjacent to the stream. As well, critical infrastructure can be damaged.
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LWD management has evolved over the years from removal of debris to a long term passing management approach. A LWD passing approach would cause large wooden logs and branches to rotate parallel with the flow of the creek to pass beneath bridges.

The average tree length in the Soquel Creek watershed was identified as being between 15 and 30 feet long. The narrowest clear span of the Stockton Avenue Bridge is 10 feet. This appears to cause buildup of debris that can span the whole creek width, cause damage to the bridge, and cause significant flooding to adjacent areas.

The 2016 Due Diligence memorandum, prepared
by Kimley Horn, identified four potential debris
control countermeasures: debris sweeper, debris
fins, debris deflectors (cage and pier variants)
and bridge replacement. The purpose of this
report is to analyze each debris diversion
countermeasure and potential flood risk along
Soquel Creek.

Existing Conditions
The Stockton Avenue Bridge is furthest downstream bridge in the Soquel Creek watershed, which is known to have LWD that has historically caused flooding by damming up bridges, specifically in 1955 and 1982 storm seasons. Bridges upstream from the site, at Soquel Drive and Highway 1, have larger spans than the Stockton Avenue Bridge. The span of the Soquel Drive Bridge, which was replaced in 1890, 1927, 1956 and most recently in 2003 with the added intent to facilitate the passage of LWD, now has a span of 140 feet compared to the Stockton Avenue Bridge center clear span of 80 feet.

This increase in bridge clear span at Soquel Drive Bridge creates a higher potential than historically existed for debris to accumulate upstream of Stockton Avenue Bridge and cause flooding risk to low laying areas. During a March 18th, 2024 site visit, LWD was observed in the eastern bridge span. Sediment accumulated around the LWD reducing the hydraulic capacity of the bridge.

Figure: Debris Accumulation in
Eastern Span of Stockton
Avenue Bridge
Figure: 1982 Debris Accumulation upstream of
Soquel Drive Bridge.
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Countermeasure Alternatives
Alternative 1: Debris Diversion Fin
Debris diversion fins are comprised of
vertical, free-standing, reinforced
concrete walls extending upstream from,
but not connected to, the existing bridge
piers. The top of the fin wall can be
sloping or horizontal. In the proposed
alternative, the top of the fin wall is
sloping; higher adjacent to the bridge
and declining into the fin wall footing at
the opposite end. The eastern fin wall is
suggested to be installed at an angle to
minimize debris catch between the
bridge pier and the creek wall; a space that
is approximately 8 feet to 9 feet wide at
the narrowest.

Alternative 2: Debris Diversion Cage
Debris diversion cages are meant to
orient large debris to flow under the
bridge. The debris diversion cages are
comprised of a prefabricated steel
triangular cage upstream of a bridge
that are designed to orient debris such
as trees or logs so that they pass under
the bridge longitudinally. The cage may
also be located directly in front of a pier.

For bridge deflectors to work, the flow
direction needs to be fairly stable.

Installation of a debris diversion cages at
the Stockton Avenue Bridge would be
comprised of cages at each bridge pier, placed on three reinforced concrete piers within the Soquel Creek channel.

Figure: Debris Diversion Fin
Figure: Debris Diversion Cage
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Alternative 3: Debris Deflector Piers
Debris diversion piers are meant to orient
large debris to flow under the bridge. The
debris deflectors are comprised of vertical
poles upstream of a bridge that are
designed to orient debris such as trees or
logs so that it passes under the bridge
longitudinally. The deflectors may also be
located directly in front of a pier. For
bridge deflectors to work, the flow
direction needs to be fairly stable. The
design of this type of system is
complicated, and physical model tests
may be necessary.

Implementation of a debris diversion piers at the Stockton Avenue Bridge would be comprised of eleven (11) piers at each bridge pier, placed on reinforced concrete piers with in the Soquel Creek channel.

Alternative 4: Debris Sweeper
Debris sweepers are a vaned cylinder
located in front of a pier that rotates with
the flow and “sweeps” the debris away
from the pier and into the flow between
bridge piers. Sweepers are usually
polyethylene and float up and down so
they can move with the water surface.

Implementation at the Stockton Avenue
Bridge would include the installation of two
manufactured floating debris sweepers
adjacent to the existing piers within the
channel of Soquel Creek. The sweepers
would be installed on reinforced concrete
piers, and the sweepers would rise and fall
with the water level of the creek.

Figure: Debris Diversion Piers
Figure: Debris Sweeper
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Alternative 5: Bridge Replacement
Replacement of the Stockton Avenue Bridge would include a 135 foot clear span bridge, with abutments in the same location as the existing bridge and a six (6) foot deck structure. The replacement would widen the bridge by eight (8) feet to 52 feet wide. The widened bridge will accommodate the increased street section.

Figure: Preliminary Longitudinal Section of Bridge Replacement 306
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Hydraulic Analysis
Water surface elevations within Soquel Creek at the Stockton Avenue Bridge were calculated using HEC-RAS version 6.5, the Army Corps of Engineer’s Hydrologic Engineering Center’s River Analysis System computer program. Use of HEC-RAS to model channel hydraulics for the scenarios provided is considered appropriate as the water in the channel, at the elevations modeled, is flowing in one direction, downstream, toward the ocean during the flow event.

Topography
The source for topographic information in the area of the project is the County of Santa Cruz Geographic Information Systems Department.

Bridge
The source for dimensions of the Stockton Avenue Bridge is the As Built Plans Set from Caltrans, Document No. 40008995 for Capitola Bridge, dated October 1933.

Peak Flow
The peak flow used for the 100-year storm event is 17,500 cfs in accordance with the Federal Emergency Management Agency’s (FEMA) Flood Insurance Study (FIS) for Santa Cruz County, CA and Incorporated Areas, FIS No. 06087CV001C.

The peak flow for the lower flow event of 1,200 cfs is pulled from the United States Geological Survey’s (USGS) website, “USGS Water Data for the Nation” (waterdata.usgs.gov/nwis). USGS provides data retrieved from a flow monitoring location in Soquel Creek. Between January 2024 and March 2024 four storms produced flows of 1000 cfs or more in Soquel Creek. Large woody debris was observed to be caught below the Stockton Avenue Bridge in February 2024 and in March 2024.

Hydrograph for Unsteady Flow Analysis
A simplified hydrograph was developed based upon the flow data for the lower peak flow storm of January 2024. The hydrograph assumes a storm flow duration of 24 hours with peak flow occurring at 9 hours and 15 minutes after the start of the flow event.

Starting Hydraulic Grade Line
In this preliminary analysis, to evaluate the response of hydraulic grade line upstream of the Stockton Avenue Bridge to each of the Countermeasure Alternatives, it is assumed that the tide is low and Soquel Creek flows freely at normal depth conditions toward the Pacific Ocean.

Channel Roughness
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United States Geological Survey Water-Supply Paper 2339 “Guide for Selecting Manning’s Roughness Coefficients for Natural Channels and Flood Plains” G. Arcement, Jr. & V. Schneider Main Channel:

Table 1. “Base values of Manning’s n”
Sand Channel
n = 0.026
Floodplains:

Utilize a base value of 0.026 and add an adjustment factor from:

Table 2. “Adjustment values for factors that affect the roughness of a channel” Amount of vegetation – medium – adjustment factor 0.010 n = 0.036
Debris Piers
HEC-RAS includes the ability to identify the width and depth of floating debris caught on bridge piers, which affect the channel cross section geometry. Data is not available for the amount of LWD that could be caught on a structure for any given storm event. Assumptions were made for the amount of floating debris caught on the Stockton Avenue Bridge and the counter measure alternatives. These assumptions are provided below.

Additional Assumptions for Existing Condition and Countermeasure Alternatives Existing Condition
• Assumes that debris is caught on the bridge piers.
• Debris capture is represented by debris piers in the HEC-RAS model • Debris piers extend 15 feet on either side of the centerline of the eastern bridge pier. • Debris piers extend 10 feet on either side of the centerline of the western bridge pier. • The debris pier floats below the water surface at 6’ deep.

Alternative 1: Debris Diversion Fin
• Fins are represented by a blockage in the channel.
• Because the fin is angled toward the creek wall, it is assumed that LWD for the most part, continues to flow past and under the bridge to the ocean. However, it is assumed that some amount of debris will be caught on “v” that the fin forms with the creek wall. The 308
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LWD retained on the angled fin is assumed to block the flow of water from passing under the small eastern span of the bridge.

Goal of analysis: See whether there is a reduction in capacity of the channel and resulting increase in water surface elevation, assuming that the fins are mostly functioning but some debris is caught on them.

Alternative 2: Debris Diversion Cage
• Both cages are represented as the piers of a false bridge inserted upstream of the Stockton Avenue Bridge
• The center of the false bridge is at the midpoint of the triangle made by the cage. • The diversion cages are represented as piers of the false bridge. It is assumed that some amount of debris will be caught on the cages, rendering the space inside the cage an area of ineffective flow.
• The width of the false bridge is the same as the length of the triangle made by the cage in the stream.
• The piers of the false bridge vary in width from upstream to downstream. Pier widths up and downstream match the width of the cage in the stream. • The floating pier debris option is turned on to account for some amount of debris caught on the debris diversion cage.
• The width of the debris is assumed to extend 4.75 feet on either side of the nose of the cage.
• The depth of debris is assumed to extend 9.5 feet below the water surface.

Goal of analysis: See the reduction in capacity of the channel and resulting increase in water surface elevation assuming that the diversion cages are mostly functioning but some debris is caught on them.

Alternative 3: Debris Deflector Piers
• Both sets of piers are represented as the piers of a false bridge inserted upstream of the Stockton Avenue Bridge
• The center of the false bridge is at the midpoint of the pier triangle. • It is assumed that some amount of debris will be caught on the piers, rendering the space inside the pier configuration, behind the debris, an area of ineffective flow. • The width of the false bridge is the same as the length of the triangle in the stream. • The piers of the false bridge vary in width from upstream to downstream. Pier widths up and downstream match the width of the debris piers in the stream. • The floating pier debris option is turned on to account for some amount of debris caught on the piers.
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• The width of the debris is assumed to extend 4.75 feet on either side of the pier. • The depth of debris is assumed to be 4 feet below the water surface.

Goal of analysis: See the whether there is a reduction in capacity of the channel and resulting increase in water surface elevation assuming that the deflector piers are mostly functioning but some debris is caught on them. The amount of debris is less than for the Debris Diversion Cages.

Alternative 4: Debris Sweeper
• Both sweepers are represented as the piers of a false bridge inserted upstream of the Stockton Avenue Bridge
• The center of the false bridge is at the centerline of the sweeper and its supporting pole. • It is assumed that some amount of debris will be caught on the sweeper. • The floating pier debris option is turned on to account for some amount of debris caught on the sweeper.
• The width of the debris is assumed to extend 2.75 feet on either side of the sweeper. • The depth of debris is assumed to be 4 feet below the water surface.

Goal of the analysis: See the whether there is a reduction in capacity of the channel and resulting increase in water surface elevation assuming that the debris sweepers are mostly functioning but some debris is caught on them.

Alternative 5: Bridge Replacement
Goal of the analysis: See the change in capacity of the channel, over existing conditions, with the construction of a clear span bridge and removal of existing bridge and bridge piers in the channel.

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Results
Table 1: Depth at Upstream Side of Stockton Avenue Bridge All Alternatives with Debris Capture
Model
Station
170.36
Existing
Conditions
(with debris)
(feet)
Alternative 1
Debris Fin
(feet)
Alternative 2
Debris Cage
(feet)
Alternative 3
Debris Piers
(feet)
Alternative 4
Debris
Sweeper
(feet)
Q100
17,500 cfs 11.29 12.82 11.72 11.72 11.66
QJan2024
1,200 cfs 3.96 5.50 4.02 4.02 4.01
Table 2: Depth 50 feet upstream of Stockton Avenue Bridge All Alternatives with Debris Capture
Model
Station
218.85
Existing
Conditions
(with debris)
(feet)
Alternative 1
Debris Fin
(feet)
Alternative 2
Debris Cage
(feet)
Alternative 3
Debris Piers
(feet)
Alternative 4
Debris
Sweeper
(feet)
Q100
17,500 cfs 15.61 18.11 14.20 13.90 14.17
QJan2024
1,200 cfs 4.18 6.53 4.18 4.17 4.18
Table 3: Depth at Upstream Side of Stockton Avenue Bridge Existing Conditions and Alternative 5 (Clear Span Bridge) Model
Station
170.36
Existing
Conditions
(feet)
Alternative 5
Clear Span
Bridge
(feet)
Q100
17,500 cfs 11.71 11.91
QJan2024
1,200 cfs 4.02 4.03
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Table 4: Depth 50 feet upstream of Stockton Avenue Bridge Existing Conditions and Alternative 5 (Clear Span Bridge) Model
Station
218.85
Existing
Conditions
(feet)
Alternative 5
Clear Span
Bridge
(feet)
Q100
17,500 cfs 13.06 12.20
QJan2024
1,200 cfs 4.05 4.02
Conclusions
As seen in Tables 1 and 2, above, with the exception of Alternative 1, the debris fin, water surface elevations on the upstream side of the Stockton Avenue Bridge for Alternatives 2 through 4, are within 6” of the existing condition water surface elevations. The debris diversion fin alternative shows an increase in water surface elevation by 1.5’ at the bridge. This increase is due to a partial blockage of the channel by the eastern fin. The blockage is caused by angling the fin toward the creek wall to deflect LWD away from the narrow span underneath the bridge on its east side.

Further upstream, however, water surface elevations associated with debris countermeasure Alternatives 2 through 4 are lower by 1.4 to 1.7 feet than existing conditions for the 100-year event, indicating a relief in backwater conditions due to the change in LWD capture at the bridge. For the lower flow event, there is negligible difference in water surface elevation upstream due to the installation of Alternatives 2 through 4. Backwater effects upstream are exacerbated by the blockage of the channel caused by the eastern fin for both the 100-year and lower flow event.

Tables 3 and 4 provide a comparison of water surface elevations, for the 100-year and lower flow events, between the bridge in Existing Condition, and the Alternative 5 Clear Span Bridge.

Both scenarios were modeled assuming no debris accumulation in order to compare channel capacity. At the upstream side of the bridge, the water surface elevation increases by 0.2’ for the 100-year event and 0.1’ for the lower flow event. While there is a loss of the existing bridge piers in the middle of the channel for the clear span bridge, the clear span bridge has a deeper deck section which becomes submerged on the eastern side during the 100-year event, causing 312
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a constriction in the model. Upstream of the bridge, water surface elevation goes down with Alternative 5. The increased capacity at the channel bottom under the bridge by removal of the existing bridge piers may be alleviating backwater effects upstream in spite of the new, deeper bridge deck being partially submerged during the 100-year event.

It is noted that at the bridge for the existing condition, the 100-year water surface elevation is slightly less (approximately 5”) for the model which includes debris. This is due to a velocity difference in the channel under the bridge. The model with the debris included indicates that water velocity under the bridge is higher under the debris condition, 13.7 +/- feet per second vs.

10.9 +/- feet per second for the no-debris condition. But while water surface is elevated by 0.2’ at the bridge, further upstream, water surface elevation for the 100-year event is decreased. For the lower flow event, changes in water surface elevation between existing condition and Alternative 5, the clear span bridge, are negligible.

When upstream conditions are compared for the Existing Conditions with Debris (the existing bridge with no diversion measures and capturing debris on the existing bridge piers) and Alternative 5 (clear span bridge), the models show an approximately 2.6 feet decrease in water surface elevation.
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Attachment 1
HEC-RAS Model Results Tables

314
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HEC-RAS Plan: ExCondStead1200 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile E.G. Elev W.S. Elev Crit W.S. Frctn Loss C & E Loss Top Width Q Left Q Channel Q Right Vel Chnl (ft) (ft) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft/s)
SoquelCreekUP 203.28 PF 1 4.16 4.07 0.00 0.00 120.81 1200.00 2.44 SoquelCreekUP 195.4 PF 1 4.16 4.07 1.45 0.00 0.01 121.47 1200.00 2.44 SoquelCreekUP 170.36 BR U PF 1 4.15 4.01 1.63 0.02 0.01 101.95 1200.00 2.93 SoquelCreekUP 170.36 BR D PF 1 4.11 4.00 1.50 0.00 0.01 115.03 1200.00 2.61 SoquelCreekUP 145.32 PF 1 4.10 4.01 0.00 0.00 126.03 1200.00 2.38 SoquelCreekUP 140.31 PF 1 4.10 4.01 0.00 0.00 124.07 1200.00 2.42 Existing Condition
Q1200
With Debris
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Item 9 A.

HEC-RAS Plan: ExCondStead1 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile E.G. Elev W.S. Elev Crit W.S. Frctn Loss C & E Loss Top Width Q Left Q Channel Q Right Vel Chnl (ft) (ft) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft/s)
SoquelCreekUP 203.28 PF 1 14.96 13.25 0.01 0.02 149.14 17500.00 10.47 SoquelCreekUP 195.4 PF 1 14.93 13.16 8.71 0.01 0.34 148.55 17500.00 10.67 SoquelCreekUP 170.36 BR U PF 1 14.58 11.67 9.65 0.20 0.18 115.52 17500.00 13.68 SoquelCreekUP 170.36 BR D PF 1 14.19 11.64 9.13 0.01 0.26 121.12 17500.00 12.80 SoquelCreekUP 145.32 PF 1 13.93 11.89 0.01 0.00 148.64 17500.00 11.45 SoquelCreekUP 140.31 PF 1 13.92 11.87 0.02 0.09 143.71 17500.00 11.47 Existing Condition
Q17500
With Debris
316
Item 9 A.

HEC-RAS Plan: QS 17500 No Debris River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 17500.00 0.00 13.82 15.37 0.001307 10.45 2033.18 289.28 0.51 SoquelCreekUP 447.43 PF 1 17500.00 0.00 13.79 15.36 0.001337 10.50 2018.04 288.34 0.52 SoquelCreekUP 433.47 PF 1 17500.00 0.00 13.81 15.33 0.001355 10.28 2033.95 293.08 0.52 SoquelCreekUP 423.47 PF 1 17500.00 0.00 13.79 15.31 0.001363 10.26 2024.38 290.99 0.52 SoquelCreekUP 413.47 PF 1 17500.00 0.00 13.65 15.29 0.001368 10.69 1996.93 293.06 0.52 SoquelCreekUP 393.46 PF 1 17500.00 0.00 13.72 15.22 0.001374 10.10 2017.60 297.27 0.51 SoquelCreekUP 373.46 PF 1 17500.00 0.00 13.56 15.18 0.001446 10.49 1949.61 302.70 0.53 SoquelCreekUP 353.46 PF 1 17500.00 0.00 13.43 15.14 0.001473 10.74 1890.19 297.99 0.54 SoquelCreekUP 333.46 PF 1 17500.00 0.00 13.41 15.10 0.001469 10.65 1888.57 297.93 0.54 SoquelCreekUP 313.46 PF 1 17500.00 0.00 13.24 15.06 0.001492 10.98 1799.80 294.97 0.55 SoquelCreekUP 293.46 PF 1 17500.00 0.00 13.19 15.03 0.001501 10.95 1737.53 296.86 0.55 SoquelCreekUP 273.46 PF 1 17500.00 0.00 13.17 15.00 0.001486 10.93 1698.64 214.35 0.55 SoquelCreekUP 253.46 PF 1 17500.00 0.00 13.29 14.90 0.001922 10.17 1721.48 194.88 0.60 SoquelCreekUP 245.93 PF 1 17500.00 0.00 13.28 14.88 0.001893 10.13 1727.34 193.41 0.60 SoquelCreekUP 228.95 PF 1 17500.00 0.00 13.20 14.84 0.001874 10.26 1705.25 185.14 0.60 SoquelCreekUP 218.85 PF 1 17500.00 0.00 13.06 14.81 0.001641 10.63 1661.97 171.40 0.57 SoquelCreekUP 211.97 PF 1 17500.00 0.00 13.05 14.80 0.001725 10.60 1651.43 158.21 0.58 SoquelCreekUP 203.28 PF 1 17500.00 0.00 12.97 14.77 0.001666 10.74 1629.34 147.62 0.57 SoquelCreekUP 195.4 PF 1 17500.00 0.00 12.89 8.71 14.74 0.001455 10.91 1603.46 147.53 0.56 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 17500.00 0.00 11.89 13.93 0.001851 11.45 1528.91 148.64 0.60 SoquelCreekUP 140.31 PF 1 17500.00 0.00 11.87 13.92 0.002036 11.47 1525.11 143.71 0.62 SoquelCreekUP 130.3 PF 1 17500.00 0.00 11.45 13.80 0.002425 12.31 1421.37 137.80 0.68 SoquelCreekUP 120.28 PF 1 17500.00 0.00 10.98 13.67 0.002923 13.16 1331.51 137.93 0.74 SoquelCreekUP 110.27 PF 1 17500.00 0.00 10.88 9.27 13.64 0.003633 13.34 1312.21 156.21 0.81 SoquelCreekUP 103.87 PF 1 17500.00 0.00 9.62 9.62 13.50 0.005676 15.80 1111.51 147.73 1.00 SoquelCreekUP 86.16 PF 1 17500.00 0.00 8.15 8.15 12.16 0.005653 16.06 1090.40 139.30 1.00 SoquelCreekUP 76.02 PF 1 17500.00 0.00 7.37 7.37 11.05 0.005689 15.38 1137.69 154.86 1.00 SoquelCreekUP 65.88 PF 1 17500.00 0.00 6.92 6.92 10.38 0.005723 14.92 1173.01 169.85 1.00 SoquelCreekUP 59.74 PF 1 17500.00 0.00 6.73 6.73 10.09 0.005734 14.70 1190.18 177.25 1.00 SoquelCreekUP 49.6 PF 1 17500.00 0.00 6.97 6.49 9.78 0.004561 13.44 1302.23 187.14 0.90 SoquelCreekUP 38.98 PF 1 17500.00 0.00 7.30 9.57 0.003460 12.08 1448.60 198.82 0.79 SoquelCreekUP 28.98 PF 1 17500.00 0.00 7.44 9.46 0.003134 11.41 1533.92 206.96 0.74 SoquelCreekUP 18.98 PF 1 17500.00 0.00 7.23 9.41 0.003478 11.86 1475.24 211.82 0.79 SoquelCreekUP 10 PF 1 17500.00 0.00 7.16 6.26 9.38 0.003730 11.96 1462.96 219.52 0.82 SoquelCreekUP 0 PF 1 17500.00 0.00 6.41 6.41 9.27 0.005792 13.56 1290.64 226.00 1.00 Existing Condition
Q17500
No Debris
317
Item 9 A.

HEC-RAS Plan: PCOpt117500 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile E.G. Elev W.S. Elev Crit W.S. Frctn Loss C & E Loss Top Width Q Left Q Channel Q Right Vel Chnl (ft) (ft) (ft) (ft) (ft) (ft) (cfs) (cfs) (cfs) (ft/s)
SoquelCreekUP 203.28 PF 1 18.71 17.95 0.05 0.31 327.16 335.08 17164.93 7.05 SoquelCreekUP 195.4 PF 1 18.35 16.55 12.58 0.01 0.86 235.59 9.77 17490.23 10.77 SoquelCreekUP 170.36 BR U PF 1 17.48 12.82 12.82 0.24 1.06 108.41 17500.00 17.32 SoquelCreekUP 170.36 BR D PF 1 14.19 11.64 9.13 0.01 0.26 121.12 17500.00 12.80 SoquelCreekUP 145.32 PF 1 13.93 11.89 0.01 0.00 148.64 17500.00 11.45 SoquelCreekUP 140.31 PF 1 13.92 11.87 0.02 0.09 143.71 17500.00 11.47 Alternative 1
Q17500
318
Item 9 A.

HEC-RAS Plan: Opt2QS1200 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 1200.00 0.00 4.24 4.35 0.000356 2.68 447.13 105.78 0.23 SoquelCreekUP 447.43 PF 1 1200.00 0.00 4.24 4.35 0.000352 2.67 449.28 106.26 0.23 SoquelCreekUP 433.47 PF 1 1200.00 0.00 4.23 4.34 0.000348 2.65 452.30 107.07 0.23 SoquelCreekUP 423.47 PF 1 1200.00 0.00 4.23 4.34 0.000345 2.64 454.47 107.65 0.23 SoquelCreekUP 413.47 PF 1 1200.00 0.00 4.23 4.34 0.000341 2.63 456.63 108.23 0.23 SoquelCreekUP 393.46 PF 1 1200.00 0.00 4.22 4.33 0.000335 2.60 460.98 109.40 0.22 SoquelCreekUP 373.46 PF 1 1200.00 0.00 4.22 4.32 0.000329 2.58 465.31 110.56 0.22 SoquelCreekUP 353.46 PF 1 1200.00 0.00 4.21 4.31 0.000323 2.56 469.61 111.73 0.22 SoquelCreekUP 333.46 PF 1 1200.00 0.00 4.21 4.31 0.000318 2.53 473.94 112.89 0.22 SoquelCreekUP 313.46 PF 1 1200.00 0.00 4.20 4.30 0.000312 2.51 478.26 114.06 0.22 SoquelCreekUP 293.46 PF 1 1200.00 0.00 4.20 4.29 0.000307 2.49 482.59 115.23 0.21 SoquelCreekUP 273.46 PF 1 1200.00 0.00 4.19 4.29 0.000302 2.46 486.90 116.39 0.21 SoquelCreekUP 253.46 PF 1 1200.00 0.00 4.19 4.28 0.000296 2.44 491.19 117.55 0.21 SoquelCreekUP 245.93 PF 1 1200.00 0.00 4.19 4.28 0.000295 2.43 492.85 117.99 0.21 SoquelCreekUP 228.95 PF 1 1200.00 0.00 4.18 4.27 0.000290 2.42 496.48 118.98 0.21 SoquelCreekUP 218.85 PF 1 1200.00 0.00 4.18 4.27 0.000288 2.41 498.60 119.55 0.21 SoquelCreekUP 216 PF 1 1200.00 0.00 4.18 1.46 4.27 0.000286 2.40 500.05 119.95 0.21 SoquelCreekUP 204.45 Bridge
SoquelCreekUP 193.2 PF 1 1200.00 0.00 4.08 4.17 0.000291 2.43 492.98 121.47 0.21 SoquelCreekUP 193.1 PF 1 1200.00 0.00 4.06 4.16 0.000294 2.44 491.10 121.47 0.21 SoquelCreekUP 193 PF 1 1200.00 0.00 4.05 1.45 4.14 0.000298 2.45 489.17 121.47 0.22 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 1200.00 0.00 4.01 4.10 0.000294 2.38 505.04 126.03 0.21 SoquelCreekUP 140.31 PF 1 1200.00 0.00 4.01 4.10 0.000305 2.42 496.53 124.07 0.21 SoquelCreekUP 130.3 PF 1 1200.00 0.00 4.00 4.09 0.000324 2.48 483.37 121.08 0.22 SoquelCreekUP 120.28 PF 1 1200.00 0.00 3.99 4.09 0.000344 2.55 470.22 118.09 0.23 SoquelCreekUP 110.27 PF 1 1200.00 0.00 3.98 4.08 0.000366 2.62 457.24 115.10 0.23 SoquelCreekUP 103.87 PF 1 1200.00 0.00 3.97 4.08 0.000387 2.69 445.35 112.37 0.24 SoquelCreekUP 86.16 PF 1 1200.00 0.00 3.99 4.07 0.000266 2.26 531.51 133.52 0.20 SoquelCreekUP 76.02 PF 1 1200.00 0.00 4.00 4.06 0.000196 1.95 616.19 154.32 0.17 SoquelCreekUP 65.88 PF 1 1200.00 0.00 4.00 4.05 0.000161 1.77 677.47 169.42 0.16 SoquelCreekUP 59.74 PF 1 1200.00 0.00 4.00 4.05 0.000147 1.70 707.58 176.85 0.15 SoquelCreekUP 49.6 PF 1 1200.00 0.00 4.01 4.05 0.000131 1.61 747.58 186.74 0.14 SoquelCreekUP 38.98 PF 1 1200.00 0.00 4.01 4.04 0.000116 1.51 794.27 198.32 0.13 SoquelCreekUP 28.98 PF 1 1200.00 0.00 4.01 4.04 0.000107 1.46 824.57 206.33 0.13 SoquelCreekUP 18.98 PF 1 1200.00 0.00 4.01 4.04 0.000117 1.49 804.02 206.12 0.13 SoquelCreekUP 10 PF 1 1200.00 0.00 4.00 4.04 0.000123 1.52 791.15 206.16 0.14 SoquelCreekUP 0 PF 1 1200.00 0.00 4.00 1.32 4.04 0.000138 1.57 766.39 209.47 0.14 Alternative 2
Q1200
319
Item 9 A.

HEC-RAS Plan: Opt2QS17500 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 17500.00 0.00 14.85 16.05 0.000950 9.31 2336.19 297.43 0.44 SoquelCreekUP 447.43 PF 1 17500.00 0.00 14.83 16.04 0.000967 9.34 2323.40 296.52 0.44 SoquelCreekUP 433.47 PF 1 17500.00 0.00 14.85 16.01 0.000974 9.13 2343.73 301.52 0.44 SoquelCreekUP 423.47 PF 1 17500.00 0.00 14.84 16.00 0.000985 9.12 2333.31 300.12 0.44 SoquelCreekUP 413.47 PF 1 17500.00 0.00 14.76 15.99 0.000978 9.45 2324.77 301.99 0.44 SoquelCreekUP 393.46 PF 1 17500.00 0.00 14.80 15.94 0.000971 8.95 2341.85 304.84 0.44 SoquelCreekUP 373.46 PF 1 17500.00 0.00 14.71 15.92 0.001003 9.20 2304.51 313.17 0.45 SoquelCreekUP 353.46 PF 1 17500.00 0.00 14.62 15.89 0.001013 9.40 2252.35 308.12 0.45 SoquelCreekUP 333.46 PF 1 17500.00 0.00 14.62 15.86 0.001008 9.30 2253.42 308.92 0.45 SoquelCreekUP 313.46 PF 1 17500.00 0.00 14.49 15.83 0.001006 9.61 2175.55 306.77 0.46 SoquelCreekUP 293.46 PF 1 17500.00 0.00 14.43 15.81 0.001022 9.63 2112.24 308.75 0.46 SoquelCreekUP 273.46 PF 1 17500.00 0.00 14.33 15.78 0.001063 9.81 2025.39 309.02 0.47 SoquelCreekUP 253.46 PF 1 17500.00 0.00 14.46 15.69 0.001364 8.90 2014.82 305.21 0.51 SoquelCreekUP 245.93 PF 1 17500.00 0.00 14.45 15.68 0.001338 8.88 2015.14 301.75 0.51 SoquelCreekUP 228.95 PF 1 17500.00 0.00 14.39 15.65 0.001360 9.02 1967.84 298.82 0.51 SoquelCreekUP 218.85 PF 1 17500.00 0.00 14.20 15.62 0.001192 9.58 1876.80 227.45 0.49 SoquelCreekUP 216 PF 1 17500.00 0.00 14.21 8.78 15.60 0.001349 9.47 1855.09 210.80 0.51 SoquelCreekUP 204.45 Bridge
SoquelCreekUP 193.2 PF 1 17500.00 0.00 13.11 14.89 0.001367 10.71 1633.96 148.35 0.54 SoquelCreekUP 193.1 PF 1 17500.00 0.00 13.00 14.81 0.001411 10.81 1618.60 147.94 0.55 SoquelCreekUP 193 PF 1 17500.00 0.00 12.88 8.71 14.73 0.001457 10.92 1602.85 147.52 0.56 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 17500.00 0.00 11.89 13.93 0.001851 11.45 1528.91 148.64 0.60 SoquelCreekUP 140.31 PF 1 17500.00 0.00 11.87 13.92 0.002036 11.47 1525.11 143.71 0.62 SoquelCreekUP 130.3 PF 1 17500.00 0.00 11.45 13.80 0.002425 12.31 1421.37 137.80 0.68 SoquelCreekUP 120.28 PF 1 17500.00 0.00 10.98 13.67 0.002923 13.16 1331.51 137.93 0.74 SoquelCreekUP 110.27 PF 1 17500.00 0.00 10.88 9.27 13.64 0.003633 13.34 1312.21 156.21 0.81 SoquelCreekUP 103.87 PF 1 17500.00 0.00 9.62 9.62 13.50 0.005676 15.80 1111.51 147.73 1.00 SoquelCreekUP 86.16 PF 1 17500.00 0.00 8.15 8.15 12.16 0.005653 16.06 1090.40 139.30 1.00 SoquelCreekUP 76.02 PF 1 17500.00 0.00 7.37 7.37 11.05 0.005689 15.38 1137.69 154.86 1.00 SoquelCreekUP 65.88 PF 1 17500.00 0.00 6.92 6.92 10.38 0.005723 14.92 1173.01 169.85 1.00 SoquelCreekUP 59.74 PF 1 17500.00 0.00 6.73 6.73 10.09 0.005734 14.70 1190.18 177.25 1.00 SoquelCreekUP 49.6 PF 1 17500.00 0.00 6.97 6.49 9.78 0.004561 13.44 1302.23 187.14 0.90 SoquelCreekUP 38.98 PF 1 17500.00 0.00 7.30 9.57 0.003460 12.08 1448.60 198.82 0.79 SoquelCreekUP 28.98 PF 1 17500.00 0.00 7.44 9.46 0.003134 11.41 1533.92 206.96 0.74 SoquelCreekUP 18.98 PF 1 17500.00 0.00 7.23 9.41 0.003478 11.86 1475.24 211.82 0.79 SoquelCreekUP 10 PF 1 17500.00 0.00 7.16 6.26 9.38 0.003730 11.96 1462.96 219.52 0.82 SoquelCreekUP 0 PF 1 17500.00 0.00 6.41 6.41 9.27 0.005792 13.56 1290.64 226.00 1.00 Alternative 2
Q17500
320
Item 9 A.

HEC-RAS Plan: Opt3QS1200 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 1200.00 0.00 4.23 4.34 0.000359 2.69 445.98 105.77 0.23 SoquelCreekUP 447.43 PF 1 1200.00 0.00 4.23 4.34 0.000355 2.68 448.13 106.26 0.23 SoquelCreekUP 433.47 PF 1 1200.00 0.00 4.22 4.33 0.000351 2.66 451.14 107.07 0.23 SoquelCreekUP 423.47 PF 1 1200.00 0.00 4.22 4.33 0.000348 2.65 453.29 107.65 0.23 SoquelCreekUP 413.47 PF 1 1200.00 0.00 4.22 4.32 0.000344 2.63 455.45 108.23 0.23 SoquelCreekUP 393.46 PF 1 1200.00 0.00 4.21 4.32 0.000338 2.61 459.78 109.39 0.22 SoquelCreekUP 373.46 PF 1 1200.00 0.00 4.21 4.31 0.000332 2.59 464.08 110.56 0.22 SoquelCreekUP 353.46 PF 1 1200.00 0.00 4.20 4.30 0.000326 2.56 468.37 111.72 0.22 SoquelCreekUP 333.46 PF 1 1200.00 0.00 4.20 4.30 0.000320 2.54 472.68 112.89 0.22 SoquelCreekUP 313.46 PF 1 1200.00 0.00 4.19 4.29 0.000315 2.52 476.98 114.05 0.22 SoquelCreekUP 293.46 PF 1 1200.00 0.00 4.19 4.28 0.000309 2.49 481.29 115.23 0.22 SoquelCreekUP 273.46 PF 1 1200.00 0.00 4.18 4.28 0.000304 2.47 485.58 116.38 0.21 SoquelCreekUP 253.46 PF 1 1200.00 0.00 4.18 4.27 0.000299 2.45 489.86 117.55 0.21 SoquelCreekUP 245.93 PF 1 1200.00 0.00 4.17 4.27 0.000297 2.44 491.51 117.99 0.21 SoquelCreekUP 228.95 PF 1 1200.00 0.00 4.17 4.26 0.000293 2.42 495.12 118.98 0.21 SoquelCreekUP 218.85 PF 1 1200.00 0.00 4.17 1.46 4.26 0.000291 2.41 497.23 119.55 0.21 SoquelCreekUP 205.45 Bridge
SoquelCreekUP 193.2 PF 1 1200.00 0.00 4.08 4.17 0.000291 2.43 492.98 121.47 0.21 SoquelCreekUP 193.1 PF 1 1200.00 0.00 4.06 4.16 0.000294 2.44 491.10 121.47 0.21 SoquelCreekUP 193 PF 1 1200.00 0.00 4.05 1.45 4.14 0.000298 2.45 489.17 121.47 0.22 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 1200.00 0.00 4.01 4.10 0.000294 2.38 505.04 126.03 0.21 SoquelCreekUP 140.31 PF 1 1200.00 0.00 4.01 4.10 0.000305 2.42 496.53 124.07 0.21 SoquelCreekUP 130.3 PF 1 1200.00 0.00 4.00 4.09 0.000324 2.48 483.37 121.08 0.22 SoquelCreekUP 120.28 PF 1 1200.00 0.00 3.99 4.09 0.000344 2.55 470.22 118.09 0.23 SoquelCreekUP 110.27 PF 1 1200.00 0.00 3.98 4.08 0.000366 2.62 457.24 115.10 0.23 SoquelCreekUP 103.87 PF 1 1200.00 0.00 3.97 4.08 0.000387 2.69 445.35 112.37 0.24 SoquelCreekUP 86.16 PF 1 1200.00 0.00 3.99 4.07 0.000266 2.26 531.51 133.52 0.20 SoquelCreekUP 76.02 PF 1 1200.00 0.00 4.00 4.06 0.000196 1.95 616.19 154.32 0.17 SoquelCreekUP 65.88 PF 1 1200.00 0.00 4.00 4.05 0.000161 1.77 677.47 169.42 0.16 SoquelCreekUP 59.74 PF 1 1200.00 0.00 4.00 4.05 0.000147 1.70 707.58 176.85 0.15 SoquelCreekUP 49.6 PF 1 1200.00 0.00 4.01 4.05 0.000131 1.61 747.58 186.74 0.14 SoquelCreekUP 38.98 PF 1 1200.00 0.00 4.01 4.04 0.000116 1.51 794.27 198.32 0.13 SoquelCreekUP 28.98 PF 1 1200.00 0.00 4.01 4.04 0.000107 1.46 824.57 206.33 0.13 SoquelCreekUP 18.98 PF 1 1200.00 0.00 4.01 4.04 0.000117 1.49 804.02 206.12 0.13 SoquelCreekUP 10 PF 1 1200.00 0.00 4.00 4.04 0.000123 1.52 791.15 206.16 0.14 SoquelCreekUP 0 PF 1 1200.00 0.00 4.00 1.32 4.04 0.000138 1.57 766.39 209.47 0.14 Alternative 3
Q1200
321
Item 9 A.

HEC-RAS Plan: Opt3QS17500 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 17500.00 0.00 14.58 15.87 0.001029 9.59 2257.76 295.35 0.46 SoquelCreekUP 447.43 PF 1 17500.00 0.00 14.57 15.86 0.001048 9.62 2244.73 294.44 0.46 SoquelCreekUP 433.47 PF 1 17500.00 0.00 14.58 15.83 0.001057 9.41 2263.94 299.38 0.46 SoquelCreekUP 423.47 PF 1 17500.00 0.00 14.57 15.82 0.001068 9.39 2253.59 297.72 0.46 SoquelCreekUP 413.47 PF 1 17500.00 0.00 14.48 15.80 0.001062 9.74 2241.30 299.66 0.46 SoquelCreekUP 393.46 PF 1 17500.00 0.00 14.53 15.75 0.001058 9.22 2259.18 302.91 0.45 SoquelCreekUP 373.46 PF 1 17500.00 0.00 14.43 15.72 0.001096 9.50 2215.17 310.58 0.47 SoquelCreekUP 353.46 PF 1 17500.00 0.00 14.33 15.69 0.001108 9.71 2161.81 305.54 0.47 SoquelCreekUP 333.46 PF 1 17500.00 0.00 14.32 15.66 0.001104 9.61 2162.26 306.20 0.47 SoquelCreekUP 313.46 PF 1 17500.00 0.00 14.18 15.63 0.001106 9.93 2081.84 304.14 0.48 SoquelCreekUP 293.46 PF 1 17500.00 0.00 14.13 15.61 0.001122 9.94 2018.54 306.06 0.48 SoquelCreekUP 273.46 PF 1 17500.00 0.00 14.02 15.57 0.001167 10.13 1929.74 306.18 0.49 SoquelCreekUP 253.46 PF 1 17500.00 0.00 14.16 15.48 0.001518 9.22 1922.52 301.62 0.54 SoquelCreekUP 245.93 PF 1 17500.00 0.00 14.15 15.46 0.001492 9.19 1923.76 298.84 0.53 SoquelCreekUP 228.95 PF 1 17500.00 0.00 14.08 15.43 0.001511 9.33 1881.73 253.06 0.54 SoquelCreekUP 218.85 PF 1 17500.00 0.00 13.90 8.78 15.40 0.001292 9.84 1813.46 191.79 0.51 SoquelCreekUP 205.45 Bridge
SoquelCreekUP 193.2 PF 1 17500.00 0.00 13.11 14.89 0.001367 10.71 1633.96 148.35 0.54 SoquelCreekUP 193.1 PF 1 17500.00 0.00 13.00 14.81 0.001411 10.81 1618.60 147.94 0.55 SoquelCreekUP 193 PF 1 17500.00 0.00 12.88 8.71 14.73 0.001457 10.92 1602.85 147.52 0.56 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 17500.00 0.00 11.89 13.93 0.001851 11.45 1528.91 148.64 0.60 SoquelCreekUP 140.31 PF 1 17500.00 0.00 11.87 13.92 0.002036 11.47 1525.11 143.71 0.62 SoquelCreekUP 130.3 PF 1 17500.00 0.00 11.45 13.80 0.002425 12.31 1421.37 137.80 0.68 SoquelCreekUP 120.28 PF 1 17500.00 0.00 10.98 13.67 0.002923 13.16 1331.51 137.93 0.74 SoquelCreekUP 110.27 PF 1 17500.00 0.00 10.88 9.27 13.64 0.003633 13.34 1312.21 156.21 0.81 SoquelCreekUP 103.87 PF 1 17500.00 0.00 9.62 9.62 13.50 0.005676 15.80 1111.51 147.73 1.00 SoquelCreekUP 86.16 PF 1 17500.00 0.00 8.15 8.15 12.16 0.005653 16.06 1090.40 139.30 1.00 SoquelCreekUP 76.02 PF 1 17500.00 0.00 7.37 7.37 11.05 0.005689 15.38 1137.69 154.86 1.00 SoquelCreekUP 65.88 PF 1 17500.00 0.00 6.92 6.92 10.38 0.005723 14.92 1173.01 169.85 1.00 SoquelCreekUP 59.74 PF 1 17500.00 0.00 6.73 6.73 10.09 0.005734 14.70 1190.18 177.25 1.00 SoquelCreekUP 49.6 PF 1 17500.00 0.00 6.97 6.49 9.78 0.004561 13.44 1302.23 187.14 0.90 SoquelCreekUP 38.98 PF 1 17500.00 0.00 7.30 9.57 0.003460 12.08 1448.60 198.82 0.79 SoquelCreekUP 28.98 PF 1 17500.00 0.00 7.44 9.46 0.003134 11.41 1533.92 206.96 0.74 SoquelCreekUP 18.98 PF 1 17500.00 0.00 7.23 9.41 0.003478 11.86 1475.24 211.82 0.79 SoquelCreekUP 10 PF 1 17500.00 0.00 7.16 6.26 9.38 0.003730 11.96 1462.96 219.52 0.82 SoquelCreekUP 0 PF 1 17500.00 0.00 6.41 6.41 9.27 0.005792 13.56 1290.64 226.00 1.00 Alternative 3
Q17500
322
Item 9 A.

HEC-RAS Plan: Opt4QS1200 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 1200.00 0.00 4.24 4.35 0.000357 2.69 446.84 105.78 0.23 SoquelCreekUP 447.43 PF 1 1200.00 0.00 4.23 4.35 0.000353 2.67 448.99 106.26 0.23 SoquelCreekUP 433.47 PF 1 1200.00 0.00 4.23 4.34 0.000349 2.65 452.00 107.07 0.23 SoquelCreekUP 423.47 PF 1 1200.00 0.00 4.23 4.34 0.000345 2.64 454.17 107.65 0.23 SoquelCreekUP 413.47 PF 1 1200.00 0.00 4.23 4.33 0.000342 2.63 456.33 108.23 0.23 SoquelCreekUP 393.46 PF 1 1200.00 0.00 4.22 4.33 0.000336 2.60 460.67 109.39 0.22 SoquelCreekUP 373.46 PF 1 1200.00 0.00 4.21 4.32 0.000330 2.58 464.99 110.56 0.22 SoquelCreekUP 353.46 PF 1 1200.00 0.00 4.21 4.31 0.000324 2.56 469.29 111.73 0.22 SoquelCreekUP 333.46 PF 1 1200.00 0.00 4.20 4.30 0.000318 2.53 473.62 112.89 0.22 SoquelCreekUP 313.46 PF 1 1200.00 0.00 4.20 4.30 0.000313 2.51 477.93 114.06 0.22 SoquelCreekUP 293.46 PF 1 1200.00 0.00 4.19 4.29 0.000307 2.49 482.25 115.23 0.21 SoquelCreekUP 273.46 PF 1 1200.00 0.00 4.19 4.28 0.000302 2.47 486.56 116.39 0.21 SoquelCreekUP 253.46 PF 1 1200.00 0.00 4.18 4.28 0.000297 2.44 490.85 117.55 0.21 SoquelCreekUP 245.93 PF 1 1200.00 0.00 4.18 4.27 0.000295 2.44 492.50 117.99 0.21 SoquelCreekUP 228.95 PF 1 1200.00 0.00 4.18 4.27 0.000291 2.42 496.13 118.98 0.21 SoquelCreekUP 218.85 PF 1 1200.00 0.00 4.18 4.27 0.000289 2.41 498.25 119.55 0.21 SoquelCreekUP 216 PF 1 1200.00 0.00 4.17 4.26 0.000289 2.41 498.01 119.55 0.21 SoquelCreekUP 211.97 PF 1 1200.00 0.00 4.17 4.26 0.000287 2.40 499.45 119.95 0.21 SoquelCreekUP 206 PF 1 1200.00 0.00 4.17 4.26 0.000284 2.39 502.91 120.83 0.21 SoquelCreekUP 203.28 PF 1 1200.00 0.00 4.17 4.26 0.000284 2.39 502.62 120.83 0.21 SoquelCreekUP 199 PF 1 1200.00 0.00 4.17 1.45 4.25 0.000271 2.38 503.49 121.48 0.21 SoquelCreekUP 196.94 Bridge
SoquelCreekUP 193.2 PF 1 1200.00 0.00 4.10 4.19 0.000286 2.42 495.52 121.47 0.21 SoquelCreekUP 193.1 PF 1 1200.00 0.00 4.08 4.18 0.000289 2.43 493.68 121.47 0.21 SoquelCreekUP 193 PF 1 1200.00 0.00 4.07 1.45 4.16 0.000293 2.44 491.76 121.47 0.21 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 1200.00 0.00 4.01 4.10 0.000294 2.38 505.04 126.03 0.21 SoquelCreekUP 140.31 PF 1 1200.00 0.00 4.01 4.10 0.000305 2.42 496.53 124.07 0.21 SoquelCreekUP 130.3 PF 1 1200.00 0.00 4.00 4.09 0.000324 2.48 483.37 121.08 0.22 SoquelCreekUP 120.28 PF 1 1200.00 0.00 3.99 4.09 0.000344 2.55 470.22 118.09 0.23 SoquelCreekUP 110.27 PF 1 1200.00 0.00 3.98 4.08 0.000366 2.62 457.24 115.10 0.23 SoquelCreekUP 103.87 PF 1 1200.00 0.00 3.97 4.08 0.000387 2.69 445.35 112.37 0.24 SoquelCreekUP 86.16 PF 1 1200.00 0.00 3.99 4.07 0.000266 2.26 531.51 133.52 0.20 SoquelCreekUP 76.02 PF 1 1200.00 0.00 4.00 4.06 0.000196 1.95 616.19 154.32 0.17 SoquelCreekUP 65.88 PF 1 1200.00 0.00 4.00 4.05 0.000161 1.77 677.47 169.42 0.16 SoquelCreekUP 59.74 PF 1 1200.00 0.00 4.00 4.05 0.000147 1.70 707.58 176.85 0.15 SoquelCreekUP 49.6 PF 1 1200.00 0.00 4.01 4.05 0.000131 1.61 747.58 186.74 0.14 SoquelCreekUP 38.98 PF 1 1200.00 0.00 4.01 4.04 0.000116 1.51 794.27 198.32 0.13 SoquelCreekUP 28.98 PF 1 1200.00 0.00 4.01 4.04 0.000107 1.46 824.57 206.33 0.13 SoquelCreekUP 18.98 PF 1 1200.00 0.00 4.01 4.04 0.000117 1.49 804.02 206.12 0.13 SoquelCreekUP 10 PF 1 1200.00 0.00 4.00 4.04 0.000123 1.52 791.15 206.16 0.14 SoquelCreekUP 0 PF 1 1200.00 0.00 4.00 1.32 4.04 0.000138 1.57 766.39 209.47 0.14 Alternative 4
Q1200
323
Item 9 A.

HEC-RAS Plan: Opt4QS17500 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 17500.00 0.00 14.82 16.03 0.000957 9.34 2328.16 297.23 0.44 SoquelCreekUP 447.43 PF 1 17500.00 0.00 14.80 16.02 0.000975 9.37 2315.35 296.31 0.45 SoquelCreekUP 433.47 PF 1 17500.00 0.00 14.82 15.99 0.000982 9.16 2335.57 301.30 0.45 SoquelCreekUP 423.47 PF 1 17500.00 0.00 14.81 15.99 0.000993 9.15 2325.16 299.87 0.45 SoquelCreekUP 413.47 PF 1 17500.00 0.00 14.73 15.97 0.000986 9.47 2316.26 301.75 0.44 SoquelCreekUP 393.46 PF 1 17500.00 0.00 14.77 15.92 0.000979 8.98 2333.41 304.64 0.44 SoquelCreekUP 373.46 PF 1 17500.00 0.00 14.68 15.89 0.001012 9.23 2295.41 312.91 0.45 SoquelCreekUP 353.46 PF 1 17500.00 0.00 14.59 15.87 0.001022 9.43 2243.15 307.86 0.45 SoquelCreekUP 333.46 PF 1 17500.00 0.00 14.59 15.84 0.001017 9.34 2244.16 308.64 0.45 SoquelCreekUP 313.46 PF 1 17500.00 0.00 14.46 15.81 0.001016 9.64 2166.05 306.51 0.46 SoquelCreekUP 293.46 PF 1 17500.00 0.00 14.40 15.79 0.001032 9.66 2102.58 308.47 0.46 SoquelCreekUP 273.46 PF 1 17500.00 0.00 14.30 15.76 0.001073 9.84 2015.51 308.73 0.47 SoquelCreekUP 253.46 PF 1 17500.00 0.00 14.43 15.67 0.001379 8.93 2005.27 304.83 0.52 SoquelCreekUP 245.93 PF 1 17500.00 0.00 14.42 15.65 0.001353 8.91 2005.69 301.45 0.51 SoquelCreekUP 228.95 PF 1 17500.00 0.00 14.35 15.63 0.001375 9.06 1958.40 298.51 0.52 SoquelCreekUP 218.85 PF 1 17500.00 0.00 14.17 15.60 0.001203 9.61 1869.82 225.95 0.49 SoquelCreekUP 216 PF 1 17500.00 0.00 14.16 15.59 0.001206 9.62 1867.36 225.42 0.49 SoquelCreekUP 211.97 PF 1 17500.00 0.00 14.17 15.57 0.001366 9.50 1846.33 209.10 0.52 SoquelCreekUP 206 PF 1 17500.00 0.00 14.06 15.54 0.001281 9.76 1792.39 175.32 0.50 SoquelCreekUP 203.28 PF 1 17500.00 0.00 14.04 15.53 0.001285 9.77 1790.35 174.81 0.51 SoquelCreekUP 199 PF 1 17500.00 0.00 13.93 8.71 15.49 0.001099 10.03 1744.56 151.65 0.49 SoquelCreekUP 196.94 Bridge
SoquelCreekUP 193.2 PF 1 17500.00 0.00 13.36 15.07 0.001278 10.50 1667.22 149.36 0.53 SoquelCreekUP 193.1 PF 1 17500.00 0.00 13.26 15.00 0.001314 10.58 1653.42 148.95 0.53 SoquelCreekUP 193 PF 1 17500.00 0.00 13.14 8.71 14.92 0.001355 10.68 1638.31 148.49 0.54 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 17500.00 0.00 11.89 13.93 0.001851 11.45 1528.91 148.64 0.60 SoquelCreekUP 140.31 PF 1 17500.00 0.00 11.87 13.92 0.002036 11.47 1525.11 143.71 0.62 SoquelCreekUP 130.3 PF 1 17500.00 0.00 11.45 13.80 0.002425 12.31 1421.37 137.80 0.68 SoquelCreekUP 120.28 PF 1 17500.00 0.00 10.98 13.67 0.002923 13.16 1331.51 137.93 0.74 SoquelCreekUP 110.27 PF 1 17500.00 0.00 10.88 9.27 13.64 0.003633 13.34 1312.21 156.21 0.81 SoquelCreekUP 103.87 PF 1 17500.00 0.00 9.62 9.62 13.50 0.005676 15.80 1111.51 147.73 1.00 SoquelCreekUP 86.16 PF 1 17500.00 0.00 8.15 8.15 12.16 0.005653 16.06 1090.40 139.30 1.00 SoquelCreekUP 76.02 PF 1 17500.00 0.00 7.37 7.37 11.05 0.005689 15.38 1137.69 154.86 1.00 SoquelCreekUP 65.88 PF 1 17500.00 0.00 6.92 6.92 10.38 0.005723 14.92 1173.01 169.85 1.00 SoquelCreekUP 59.74 PF 1 17500.00 0.00 6.73 6.73 10.09 0.005734 14.70 1190.18 177.25 1.00 SoquelCreekUP 49.6 PF 1 17500.00 0.00 6.97 6.49 9.78 0.004561 13.44 1302.23 187.14 0.90 SoquelCreekUP 38.98 PF 1 17500.00 0.00 7.30 9.57 0.003460 12.08 1448.60 198.82 0.79 SoquelCreekUP 28.98 PF 1 17500.00 0.00 7.44 9.46 0.003134 11.41 1533.92 206.96 0.74 Alternative 4
Q17500
324
Item 9 A.

HEC-RAS Plan: Opt4QS17500 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 (Continued) Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 18.98 PF 1 17500.00 0.00 7.23 9.41 0.003478 11.86 1475.24 211.82 0.79 SoquelCreekUP 10 PF 1 17500.00 0.00 7.16 6.26 9.38 0.003730 11.96 1462.96 219.52 0.82 SoquelCreekUP 0 PF 1 17500.00 0.00 6.41 6.41 9.27 0.005792 13.56 1290.64 226.00 1.00 Alternative 4
Q17500
325
Item 9 A.

HEC-RAS Plan: Opt5QS1200 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 1200.00 0.00 4.10 4.22 0.000397 2.78 432.30 105.69 0.24 SoquelCreekUP 447.43 PF 1 1200.00 0.00 4.10 4.22 0.000393 2.76 434.34 106.24 0.24 SoquelCreekUP 433.47 PF 1 1200.00 0.00 4.09 4.21 0.000388 2.74 437.19 107.04 0.24 SoquelCreekUP 423.47 PF 1 1200.00 0.00 4.09 4.21 0.000385 2.73 439.23 107.63 0.24 SoquelCreekUP 413.47 PF 1 1200.00 0.00 4.09 4.20 0.000381 2.72 441.27 108.21 0.24 SoquelCreekUP 393.46 PF 1 1200.00 0.00 4.08 4.19 0.000375 2.69 445.38 109.37 0.24 SoquelCreekUP 373.46 PF 1 1200.00 0.00 4.07 4.18 0.000368 2.67 449.45 110.53 0.23 SoquelCreekUP 353.46 PF 1 1200.00 0.00 4.07 4.18 0.000362 2.65 453.51 111.70 0.23 SoquelCreekUP 333.46 PF 1 1200.00 0.00 4.06 4.17 0.000356 2.62 457.59 112.86 0.23 SoquelCreekUP 313.46 PF 1 1200.00 0.00 4.06 4.16 0.000350 2.60 461.66 114.03 0.23 SoquelCreekUP 293.46 PF 1 1200.00 0.00 4.05 4.15 0.000344 2.58 465.74 115.20 0.23 SoquelCreekUP 273.46 PF 1 1200.00 0.00 4.04 4.15 0.000339 2.55 469.80 116.36 0.22 SoquelCreekUP 253.46 PF 1 1200.00 0.00 4.04 4.14 0.000333 2.53 473.84 117.53 0.22 SoquelCreekUP 245.93 PF 1 1200.00 0.00 4.04 4.14 0.000331 2.52 475.40 117.97 0.22 SoquelCreekUP 228.95 PF 1 1200.00 0.00 4.03 4.13 0.000327 2.51 478.81 118.96 0.22 SoquelCreekUP 218.85 PF 1 1200.00 0.00 4.03 4.13 0.000324 2.50 480.82 119.53 0.22 SoquelCreekUP 211.97 PF 1 1200.00 0.00 4.03 4.12 0.000322 2.49 482.18 119.92 0.22 SoquelCreekUP 203.28 PF 1 1200.00 0.00 4.03 4.12 0.000318 2.47 485.48 120.80 0.22 SoquelCreekUP 195.4 PF 1 1200.00 0.00 4.02 1.45 4.12 0.000304 2.47 486.29 121.46 0.22 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 1200.00 0.00 4.01 4.10 0.000294 2.38 505.04 126.03 0.21 SoquelCreekUP 140.31 PF 1 1200.00 0.00 4.01 4.10 0.000305 2.42 496.53 124.07 0.21 SoquelCreekUP 130.3 PF 1 1200.00 0.00 4.00 4.09 0.000324 2.48 483.37 121.08 0.22 SoquelCreekUP 120.28 PF 1 1200.00 0.00 3.99 4.09 0.000344 2.55 470.22 118.09 0.23 SoquelCreekUP 110.27 PF 1 1200.00 0.00 3.98 4.08 0.000366 2.62 457.24 115.10 0.23 SoquelCreekUP 103.87 PF 1 1200.00 0.00 3.97 4.08 0.000387 2.69 445.35 112.37 0.24 SoquelCreekUP 86.16 PF 1 1200.00 0.00 3.99 4.07 0.000266 2.26 531.51 133.52 0.20 SoquelCreekUP 76.02 PF 1 1200.00 0.00 4.00 4.06 0.000196 1.95 616.19 154.32 0.17 SoquelCreekUP 65.88 PF 1 1200.00 0.00 4.00 4.05 0.000161 1.77 677.47 169.42 0.16 SoquelCreekUP 59.74 PF 1 1200.00 0.00 4.00 4.05 0.000147 1.70 707.58 176.85 0.15 SoquelCreekUP 49.6 PF 1 1200.00 0.00 4.01 4.05 0.000131 1.61 747.58 186.74 0.14 SoquelCreekUP 38.98 PF 1 1200.00 0.00 4.01 4.04 0.000116 1.51 794.27 198.32 0.13 SoquelCreekUP 28.98 PF 1 1200.00 0.00 4.01 4.04 0.000107 1.46 824.57 206.33 0.13 SoquelCreekUP 18.98 PF 1 1200.00 0.00 4.01 4.04 0.000117 1.49 804.02 206.12 0.13 SoquelCreekUP 10 PF 1 1200.00 0.00 4.00 4.04 0.000123 1.52 791.15 206.16 0.14 SoquelCreekUP 0 PF 1 1200.00 0.00 4.00 1.32 4.04 0.000138 1.57 766.39 209.47 0.14 Alternative 5
Q1200
326
Item 9 A.

HEC-RAS Plan: Opt5QS17500 River: SoquelCreek Reach: SoquelCreekUP Profile: PF 1 Reach River Sta Profile Q Total Min Ch El W.S. Elev Crit W.S. E.G. Elev E.G. Slope Vel Chnl Flow Area Top Width Froude # Chl (cfs) (ft) (ft) (ft) (ft) (ft/ft) (ft/s) (sq ft) (ft)
SoquelCreekUP 457.43 PF 1 17500.00 0.00 13.13 15.00 0.001634 11.32 1836.27 283.91 0.57 SoquelCreekUP 447.43 PF 1 17500.00 0.00 13.09 14.98 0.001679 11.39 1817.73 282.83 0.58 SoquelCreekUP 433.47 PF 1 17500.00 0.00 13.11 14.94 0.001713 11.17 1830.46 287.45 0.58 SoquelCreekUP 423.47 PF 1 17500.00 0.00 13.09 14.92 0.001725 11.15 1821.71 285.66 0.58 SoquelCreekUP 413.47 PF 1 17500.00 0.00 12.87 14.89 0.001762 11.71 1769.96 287.16 0.58 SoquelCreekUP 393.46 PF 1 17500.00 0.00 12.97 14.79 0.001780 11.05 1794.74 292.15 0.58 SoquelCreekUP 373.46 PF 1 17500.00 0.00 12.70 14.73 0.001920 11.59 1694.13 294.87 0.60 SoquelCreekUP 353.46 PF 1 17500.00 0.00 12.52 9.23 14.68 0.001986 11.92 1622.94 290.55 0.62 SoquelCreekUP 333.46 PF 1 17500.00 0.00 12.50 9.15 14.63 0.001981 11.82 1619.37 289.58 0.62 SoquelCreekUP 313.46 PF 1 17500.00 0.00 12.33 9.10 14.58 0.001999 12.09 1536.21 254.15 0.62 SoquelCreekUP 293.46 PF 1 17500.00 0.00 12.34 14.52 0.001936 11.86 1532.54 200.49 0.62 SoquelCreekUP 273.46 PF 1 17500.00 0.00 12.31 14.47 0.001912 11.82 1532.60 184.58 0.61 SoquelCreekUP 253.46 PF 1 17500.00 0.00 12.41 14.37 0.002435 11.24 1556.87 179.15 0.67 SoquelCreekUP 245.93 PF 1 17500.00 0.00 12.40 14.34 0.002365 11.19 1563.72 177.11 0.66 SoquelCreekUP 228.95 PF 1 17500.00 0.00 12.32 14.31 0.002315 11.29 1549.77 169.75 0.66 SoquelCreekUP 218.85 PF 1 17500.00 0.00 12.20 14.27 0.002117 11.54 1520.05 161.74 0.64 SoquelCreekUP 211.97 PF 1 17500.00 0.00 12.20 14.26 0.002138 11.52 1519.73 150.45 0.64 SoquelCreekUP 203.28 PF 1 17500.00 0.00 12.14 14.23 0.002074 11.61 1507.90 143.18 0.63 SoquelCreekUP 195.4 PF 1 17500.00 0.00 12.08 8.71 14.21 0.001841 11.71 1494.36 143.82 0.62 SoquelCreekUP 170.36 Bridge
SoquelCreekUP 145.32 PF 1 17500.00 0.00 11.89 13.93 0.001851 11.45 1528.91 148.64 0.60 SoquelCreekUP 140.31 PF 1 17500.00 0.00 11.87 13.92 0.002036 11.47 1525.11 143.71 0.62 SoquelCreekUP 130.3 PF 1 17500.00 0.00 11.45 13.80 0.002425 12.31 1421.37 137.80 0.68 SoquelCreekUP 120.28 PF 1 17500.00 0.00 10.98 13.67 0.002923 13.16 1331.51 137.93 0.74 SoquelCreekUP 110.27 PF 1 17500.00 0.00 10.88 9.27 13.64 0.003633 13.34 1312.21 156.21 0.81 SoquelCreekUP 103.87 PF 1 17500.00 0.00 9.62 9.62 13.50 0.005676 15.80 1111.51 147.73 1.00 SoquelCreekUP 86.16 PF 1 17500.00 0.00 8.15 8.15 12.16 0.005653 16.06 1090.40 139.30 1.00 SoquelCreekUP 76.02 PF 1 17500.00 0.00 7.37 7.37 11.05 0.005689 15.38 1137.69 154.86 1.00 SoquelCreekUP 65.88 PF 1 17500.00 0.00 6.92 6.92 10.38 0.005723 14.92 1173.01 169.85 1.00 SoquelCreekUP 59.74 PF 1 17500.00 0.00 6.73 6.73 10.09 0.005734 14.70 1190.18 177.25 1.00 SoquelCreekUP 49.6 PF 1 17500.00 0.00 6.97 6.49 9.78 0.004561 13.44 1302.23 187.14 0.90 SoquelCreekUP 38.98 PF 1 17500.00 0.00 7.30 9.57 0.003460 12.08 1448.60 198.82 0.79 SoquelCreekUP 28.98 PF 1 17500.00 0.00 7.44 9.46 0.003134 11.41 1533.92 206.96 0.74 SoquelCreekUP 18.98 PF 1 17500.00 0.00 7.23 9.41 0.003478 11.86 1475.24 211.82 0.79 SoquelCreekUP 10 PF 1 17500.00 0.00 7.16 6.26 9.38 0.003730 11.96 1462.96 219.52 0.82 SoquelCreekUP 0 PF 1 17500.00 0.00 6.41 6.41 9.27 0.005792 13.56 1290.64 226.00 1.00 Alternative 5
Q17500
327
Item 9 A.

Attachment 2
HEC-RAS Model Cross Section Plots
328
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ExCond Plan: ExCondSteadFlowQ1200 6/27/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Existing Conditions Q1200
329
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ExCond Plan: ExCondSteadFlowQ1200 6/27/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Existing Conditions Q1200
330
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ExCond Plan: ExCondSteadFlowQ1200 6/27/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Existing Conditions Q1200
331
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ExCond Plan: ExCondSteadFlow 6/27/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Existing Conditions Q17500
332
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ExCond Plan: ExCondSteadFlow 6/27/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Existing Conditions Q17500
333
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ExCond Plan: ExCondSteadFlow 6/27/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Existing Conditions Q17500
334
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ExCondNoDebrisPier Plan: ExConQ17500SNoDebris 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Existing Conditions - No Debris
335
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp1 Plan: SteadQP17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 1
336
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp1 Plan: SteadQP17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 1
337
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp1 Plan: SteadQP17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
338
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp1 Plan: SteadQP17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
339
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp1 Plan: SteadQP17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
340
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp1 Plan: SteadQP17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
341
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp1 Plan: Opt1Q1200Stead 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
342
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp1 Plan: Opt1Q1200Stead 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
343
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp1 Plan: Opt1Q1200Stead 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
344
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp1 Plan: Opt1Q1200Stead 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 1
345
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp1 Plan: Opt1Q1200Stead 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 1
346
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp1 Plan: Opt1Q1200Stead 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 1
347
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
40 ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 2
348
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 2
349
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 2
350
Item 9 A.
0 100 200 300 400 500 600
0 20
40 60
80 100
ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Bank Sta
Pier Debris
.036 .026 .036
Alternative 2
351
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
352
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
353
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
354
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
355
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
356
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp2 Plan: Opt2QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
357
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 2
358
Item 9 A.
0 100 200 300 400 500 600
0 20
40 60
80 100
ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Bank Sta
Pier Debris
.036 .026 .036
Alternative 2
359
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
360
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
361
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
362
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
363
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
364
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp2 Plan: Opt2QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 2
365
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
40 ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 3
366
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Bank Sta
.036 .026 .036
Alternative 3
367
Item 9 A.
0 100 200 300 400 500 600
0 20
40 60
80 100
ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Bank Sta
Pier Debris
.036 .026 .036
Alternative 3
368
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 3
369
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 3
370
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 3
371
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 3
372
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 3
373
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOp3 Plan: Opt3QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 3
374
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
375
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
376
Item 9 A.
0 100 200 300 400 500
0 20
40 60
80 100
ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
Pier Debris
.036 .026 .036
Alternative 4
377
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
378
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
379
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
380
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
381
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
382
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt4 Plan: Opt4QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
383
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
384
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
385
Item 9 A.
0 100 200 300 400 500
0 20
40 60
80 100
ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
Pier Debris
.036 .026 .036
Alternative 4
386
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
387
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
388
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
389
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
390
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
391
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt4 Plan: Opt4QS17000 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 4
392
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt5 Plan: Opt5QS17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
393
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOpt5 Plan: Opt5QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
394
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt5 Plan: Opt5QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
395
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt5 Plan: Opt5QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
396
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt5 Plan: Opt5QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
397
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt5 Plan: Opt5QS1200 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
398
Item 9 A.
0 100 200 300 400 500 600
0 5
10 15
20 25
30 35
ProCondOpt5 Plan: Opt5QS17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
399
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt5 Plan: Opt5QS17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
400
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 35
ProCondOpt5 Plan: Opt5QS17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Crit PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
401
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt5 Plan: Opt5QS17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
402
Item 9 A.
0 100 200 300 400 500
0 5
10 15
20 25
30 ProCondOpt5 Plan: Opt5QS17500 6/28/2024

Station (ft) Elevation (ft)
Legend
EG PF 1
WS PF 1
Ground
Ineff
Bank Sta
.036 .026 .036
Alternative 5
403
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 |
Appendix C – Geotechnical Assessment of Debris Control Countermeasure Alternatives

404
Item 9 A.

GEOTECHNICAL

ENVIRONMENTAL

WATER RESOURCES

CONSTRUCTION SERVICES

COASTAL/MARINE GEOTECHNICS
2350 Mission College Boulevard, Suite 800, Santa Clara, CA 95054  (408) 574-4900  Fax (888) 279-2698 www.engeo.com
Project No.

May 15, 2024 24335.000.002
Ms. Julia Harberson, PE, LEED AP, QSD
CSW/Stuber-Stroeh Engineering Group, Inc.
504 Redwood Boulevard, Suite 310
Novato, CA 94947
Subject: Stockton Avenue Bridge
Capitola, California

GEOTECHNICAL ASSESSMENT OF DEBRIS CONTROL

COUNTERMEASURE ALTERNATIVES
References: 1. Caltrans. 2022. Bridge Inspection Report, Routine Inspection, Bridge No. 36C0110, Soquel Creek. May 18, 2022.

2. Kimley Horn. 2016. Memorandum – Due Diligence, Stockton Avenue Bridge, City of Capitola, California. December 5, 2016.

3. Santa Cruz County. Plans – Capitola Bridge over Soquel Creek at Capitola.

October 23, 1933.

Dear Ms. Harberson:

As requested, we reviewed the geotechnical aspects of the debris countermeasure alternatives proposed for the existing Stockton Bridge located in Capitola, California. We performed a site reconnaissance on March 17, 2024.

Stockton Avenue Bridge crosses Soquel Creek and consists of two vehicular lanes and sidewalks on either side. The bridge was constructed in 1934 and consists of two abutments and three spans between 25 and 90 feet long. Based on bridge plans prepared by Santa Cruz County dated October 23, 1933, the abutments and in-creek piers are supported by 12-inch-diameter timber piles, noted as “25’+ long.”
Kimley Horn prepared a memorandum, dated December 15, 2016, outlining the flooding problems and debris concerns of Soquel Creek. The Stockton Avenue Bridge is the furthest downstream bridge in the watershed. The watershed is known to have large woody debris that has historically caused flooding by damming up bridges. Upstream bridges at Soquel Drive and Highway 1 have larger spans than the Stockton Avenue Bridge. This creates the potential for debris to accumulate upstream of Stockton Avenue Bridge.

Kimley Horn provided the following debris control countermeasures. • Debris Sweeper
• Debris Fins
• Debris Deflectors
• Bridge Replacement
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CSW/Stuber-Stroeh Engineering Group, Inc. 24335.000.002 Stockton Avenue Bridge May 15, 2024
GEOTECHNICAL ASSESSMENT OF DEBRIS CONTROL Page 2

COUNTERMEASURE ALTERNATIVES
From a geotechnical perspective, the debris sweeper, debris fin, and debris deflectors do not impact the geotechnical capacity of the existing bridge. If a bridge replacement is elected, a foundation exploration, in accordance with Caltrans, shall be performed.

If you have any questions regarding this letter, please contact us.

Sincerely,
ENGEO Incorporated
Jeanine T. Ruffoni, PE, GE Robert H. Boeche, CEG
jtr/rhb/cb
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Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 |
Appendix D – Stockton Avenue Bridge Mitigation Project
– Biological Constraints Analysis

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DENISE DUFFY & ASSOCIATES, INC.

PLANNING AND ENVIRONMENTAL CONSULTING

MEMORANDUM
Date: June 7, 2024
To: Julia Harberson, PE – CSW/Stuber-Stroeh Engineering Group, Inc.

From: Matthew Johnson - Senior Environmental Scientist/Project Manager, DD&A, Inc.

Subject: Stockton Avenue Bridge Mitigation Project – Biological Constraints Analysis This Biological Constraints Analysis provides the results of a biological analysis conducted for the Stockton Avenue Bridge Mitigation Project (project), located in the City of Capitola, California (Attachment A - Figure 1). The Capitola Village, a cultural and business center in Capitola, is located at the terminus of Soquel Creek, where it enters the Pacific Ocean.

The purpose of this memo is to assess the environmental conditions within and immediately adjacent to each alternative, evaluate the general habitat features present; assess the potential for sensitive habitats, including wetlands and waters of US/State, and special-status plant and wildlife species at the sites; evaluate environmental constraints at the site and within the local vicinity; and identify typical mitigation measures to address impacts and potential regulatory permit requirements. The survey area consists of the impact area shown on project plans (Attachment A – Figure 2). The alternatives discussed in this memo are as follows:

Alternative 1 - Angle Fin:
 Angle eastern-most fin to minimize debris catch between pier and creek wall.

Alternative 2 - Debris Deflector Cage:
 Install deflector cage to minimize debris catch.

Alternative 3 - Galvanized Pier Poles:
 Install pier poles to minimize debris catch.

Alternative 4 - Manufactured Floating Debris Sweeper:
 Install manufactured floating debris sweeper to minimize debris catch.

Alternative 5 – Clear Span Bridge:
 Remove existing footings within the channel of Soquel Creek to support a clear span bridge and widen bridge by 8’.

METHODS
DD&A Environmental Scientists conducted reconnaissance-level surveys of the survey area on May 14, 2024, to identify any special-status plant or wildlife species or suitable habitat for these species and identify any sensitive habitats present within the site. Survey methods included walking the survey area using aerial maps and GPS to map biological resources. Available reference materials were reviewed prior to 408
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conducting the field survey (see “Data Sources” below). Data collected during the survey were used to assess the environmental conditions of the survey area and its surroundings, evaluate environmental constraints at the site and within the local vicinity, and provide a basis for recommendations to minimize and avoid impacts.

The survey area was surveyed for botanical resources following the applicable guidelines outlined in the U.S. Fish and Wildlife Service (USFWS) Guidelines for Conducting and Reporting Botanical Inventories for Federally listed, Proposed and Candidate Plants (USFWS, 2000), the CDFW Protocols for Surveying and Evaluating Impacts to Special Status Native Plant Populations and Natural Communities (CDFW, 2018), and the California Native Plant Society (CNPS) Botanical Survey Guidelines (CNPS, 2001).

The survey also included an assessment of potentially jurisdictional wetlands and waters within the survey area in accordance with the requirements set forth in The Field Guide for Wetland Delineation: 1987 Corps of Engineers Manual (Wetland Training Institute, 1995) and the Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0) (Army Corps of Engineers [ACOE], 2008).

Data Sources
The primary literature and data sources reviewed to determine the occurrence or potential for occurrence of special-status species within and adjacent to the survey area include:
• Current agency status information from the USFWS and CDFW for species listed, proposed for listing, or candidates for listing as Threatened or Endangered under the ESA or CESA, and those considered CDFW “species of special concern” (CDFW, 2024b); • CDFW’s California Natural Diversity Database (CNDDB) occurrence reports for the Mt. Carmel quadrangle and the eight surrounding quadrangles (Monterey, Seaside, Spreckels, Soberanes Point, Carmel Valley, Point Sur, Big Sur, and Ventana Cones) (CDFW, 2024c; Attachment B); • The USFWS’s Information for Planning and Consulting (IPaC) Resource List (USFWS, 2024a:

Attachment B); and
• The CNPS Inventory of Rare and Endangered Vascular Plants of California (CNPS, 2024).

From these resources, a list of special-status plant and wildlife species known or with the potential to occur within and adjacent to the survey area was created (Attachment C). The list presents these species along with their legal status, habitat requirements, and a brief statement of their likelihood to occur.

Botany
A Manual of California Vegetation (Sawyer et.al., 2009) was utilized to determine if vegetation types identified as sensitive on CDFW’s California Natural Communities List (CDFW, 2024a) were present within the survey area. Scientific nomenclature for plant species identified within this document follows The Jepson Manual: Vascular Plants of California, Edition 2 (Baldwin et al., 2012); common names follow The Plants of Monterey County: An Illustrated Field Key (Matthews and Mitchell, 2015).

Wildlife
The wildlife literature and data sources were reviewed include CDFW reports on special-status wildlife (Remsen, 1978; Williams, 1986; Jennings and Hayes, 1994; Thelander, 1994), California Wildlife Habitat Relationships Program species-habitat models (Zeiner et al., 1988; and Zeiner et al., 1990), and general wildlife references (Stebbins, 1972, 1985, and 2003).
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Special-Status Species
Special-status species are those plants and animals that have been formally listed or proposed for listing as Endangered or Threatened or are Candidates for such listing under ESA or CESA. Listed species are afforded legal protection under the ESA and CESA. Species that meet the definition of rare or endangered under the CEQA Section 15380 are also considered special-status species. Animals identified as “species of special concern” (most of which are species whose breeding populations in California may face extirpation if current population trends continue) on the CDFW’s “Special Animals” list (CDFW, 2024b) meet this definition and are typically provided management consideration through the CEQA process, although they are not legally protected under the ESA or CESA.

Plants listed as rare under the California Native Plant Protection Act (CNPPA) or included in CNPS California Rare Plant Ranks (CRPR; formerly known as CNPS Lists) 1A, 1B, 2A, and 2B are also treated as special-status species as they meet the definitions of Sections 2062 and 2067 of the CESA and in accordance with CEQA Guidelines Section 15380. In general, CDFW requires that plant species on CRPR 1A (Plants presumed extirpated in California and Either Rare or Extinct Elsewhere), CRPR 1B (Plants rare, threatened, or endangered in California and elsewhere), CRPR 2A (Plants presumed extirpated in California, but more common elsewhere), and CRPR 2B (Plants rare, threatened, or endangered in California, but more common elsewhere) of the CNPS Inventory of Rare and Endangered Vascular Plants of California (CNPS, 2024) be fully considered during the preparation of environmental documents relating to CEQA.1 In addition, species of vascular plants, bryophytes, and lichens listed as having special-status by the CDFW are considered special-status plant species (CDFW, 2024c).

Raptors (e.g., eagles, hawks, and owls) and their nests are protected in California under Fish and Game Code Section 3503.5. Section 3503.5 states that it is “unlawful to take, possess, or destroy the nest or eggs of any such bird except otherwise provided by this code or any regulation adopted pursuant thereto.” In addition, fully protected species under the Fish and Game Code Section 3511 (birds), Section 4700 (mammals), Section 5515 (fish), and Section 5050 (reptiles and amphibians) are also considered specialstatus animal species. Species with no formal special-status designation but thought by experts to be rare or in serious decline may also be considered special-status animal species in some cases, depending on project-specific analysis and relevant, localized conservation needs or precedence.

Sensitive Habitats
Sensitive habitats include riparian corridors, wetlands, habitats for legally protected species, areas of high biological diversity, areas supporting rare or special-status wildlife habitat, and unusual or regionally restricted habitat types. Vegetation types considered sensitive include those identified as sensitive on the CDFW’s California Natural Communities List (i.e., those habitats that are rare or endangered within the borders of California) (CDFW, 2024a) and those that are occupied by species listed under ESA or are critical habitat in accordance with ESA. Specific habitats may also be identified as sensitive in city or county general plans or ordinances. Sensitive habitats are regulated under federal regulations (such as the Clean Water Act [CWA] and Executive Order 11990 – Protection of Wetlands), state regulations (such as CEQA and the CDFW Streambed Alteration Program), or local ordinances or policies (such as city or county tree ordinances and general plan policies).
1 Species on CRPR 3 (Plants about which we need more information - a review list) and CRPR 4 (Plants of limited distribution - a watch list) may, but generally do not, meet the definitions of Sections 2062 and 2067 of CESA, and are not typically considered in environmental documents relating to CEQA. 410
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SURVEY RESULTS
Habitat Types
As described in the Methods section, habitat types were identified within the survey area. Habitat types identified include developed and riverine (Attachment A – Figure 3). The discussion below provides an overview of the habitats observed within and adjacent to the project area and identifies if sensitive habitats are present or potentially present. Additional discussion of sensitive habitats is provided below.

Developed
• A Manual of California Vegetation classification(s): None • California Natural Communities List: Not listed
Developed portions of the survey area include the footprint of the existing bridge and surrounding urban infrastructure including sidewalks (Attachment A – Figure 3). Developed areas provide only low-quality habitat for plants and wildlife. Common wildlife species which do well in developed areas include American crow (Corvus brachyrhynchos), raccoon (Procyon lotor), striped skunk (Mephitis mephitis), scrub jay (Aphelocoma californica), European starling (Sturnus vulgaris), western fence lizard (Sceloporus occidentalis), and rock dove (Columba livia). No special-status wildlife species were observed within the developed areas of the survey area, and none are expected to occur. However, multiple active and historic violet-green swallow (Tachycineta thalassina) nests were observed underneath the existing bridge.

Riverine
• A Manual of California Vegetation classification(s): None • California Natural Communities List: Not listed
Riverine habitats are distinguished by intermittent or continuously running surface water (Zeiner et al., 1988). A stream typically originates at an elevated source, such as a spring or lake, and flows downward at a rate relative to slope or gradient and the volume of surface runoff. Riverine areas provide habitat for many aquatic species. The majority of inhabitants of fast-moving streams live in riffles on the underside of rubble and gravel, including mayflies and caddisflies. In slower moving waters with accumulating sediment, typical organisms include various species of mollusks and crustaceans.

Soquel Creek is known to support populations of central California coast steelhead (Oncorhynchus mykiss irideus), tidewater goby (Eucyclogobius newberryi), and western pond turtle (Actinemys marmorata), as well as a variety of avian species which forage within the creek. Additionally, Soquel Creek is a navigable water and is considered waters of the U.S. and State.

Sensitive Habitats
Waters of the US/State
Jurisdictional waters of the U.S. and State were identified within the survey area, consisting of open water of Soquel Creek (i.e., riverine habitat), a navigable waterway (ACOE 1971). The ordinary high-water mark (OHWM) defines the lateral extent of nontidal aquatic features in the absence of adjacent wetlands in the United States. The federal regulatory definition of the OHWM, 33 CFR 328.3(c)(7), states the OHWM is “that line on the shore established by the fluctuations of water and indicated by physical characteristics such as [a] clear, natural line impressed on the bank, shelving, changes in the character of soil, destruction of 411
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terrestrial vegetation, the presence of litter and debris, or other appropriate means that consider the characteristics of the surrounding areas.”
During the May 14, 2024, reconnaissance survey, DD&A documented the OHWM indicated by a stain line on the bridge piers and the confined banks of Soquel Creek (Attachment D – Photos 1-3) (Attachment A – Figure 4). Within the survey area Soquel Creek is a confined channel within engineered banks. The OHWM is approximately 11 feet 7 inches from the deck of the existing bridge and approximately 3 feet 8 inches from the bottom of Soquel Creek.

Special-Status Wildlife Species
The following discussion summarizes the special-status wildlife species that are known or have a moderate to high potential to occur within the survey area. Each of these species’ known or potential presence within the survey area are discussed below, as well as mitigation measures to reduce potential impacts to a lessthan-significant level under CEQA. No other special-status wildlife species are expected to occur based on lack of suitable habitat. Please refer to Attachment C for lists of all species evaluated for potential to occur.

Western Pond Turtle
Western pond turtle is proposed for listing as a federally endangered species and is a California Species of Special Concern. This species is uncommon to common in permanent or nearly permanent aquatic resources in a wide variety of habitats throughout California, west of the Sierra-Cascade crest and are absent from desert regions, except in the Mojave Desert along the Mojave River and its tributaries. Elevation range extends from near sea level to 1430 meters (4690 feet). Western pond turtles require basking sites such as partially submerged logs, rocks, mats of floating vegetation, or open mud banks. The home range of western pond turtles is typically quite restricted; however, ongoing research indicates that in many areas, turtles may leave the watercourse in late fall and move into upland habitats where they burrow into duff and/or soil and overwinter (Holland, 1994). However, western pond turtles remain active year-round and may move several times during the course of overwintering. The time spent in the terrestrial habitat appears highly variable; in southern California western pond turtles may remain in these sites for only a month or two.

In pond and lake habitats, however, some turtles remain in the pond during the winter (Holland, 1994).

Additionally, during the spring or early summer, females move overland for up to 100 meters (325 feet) to find suitable sites for egg-laying. Nests are typically excavated in compact, dry soils in areas characterized by sparse vegetation, usually short grasses or forbs (Holland, 1994). Three to 11 eggs are laid from March to August depending on local conditions (Ernst and Barbour, 1972). The western pond turtle is not known to be territorial, but aggressive encounters, including gesturing and physical combat (Bury and Wolfheim, 1973), are common and may function to maintain spacing on basking sites and to settle disputes over preferred spots. This species is considered omnivorous and food sources include aquatic plant material, beetles, and a wide variety of aquatic invertebrates. Fishes, frogs, and carrion have also been reported among their food (Stebbins, 1972).

Soquel Creek provides suitable aquatic habitat for this species. Additionally, suitable basking sites, including submerged logs, were observed within the survey area. The nearest CNDDB occurrence of this species is located approximately one mile upstream from the survey area in Soquel Creek. Therefore, this species has moderate potential to occur within the survey area. 412
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Central California Coast Steelhead
The central California coast steelhead is currently designated as federally Threatened in all naturally spawned populations (and their progeny) in streams from the Russian River (inclusive) to Aptos Creek (inclusive), and the drainages of San Francisco, San Pablo, and Suisun Bays eastward to Chipps Island at the confluence of the Sacramento and San Joaquin Rivers; and tributary streams to Suisun Marsh including Suisun Creek, Green Valley Creek, and an unnamed tributary to Cordelia Slough (commonly referred to as a Red Top Creek), exclusive of the Sacramento-San Joaquin River Basin of the California Central Valley (71 FR 833-862). The designation of critical habitat for steelhead became effective on January 2, 2006.

Primary constituent elements include freshwater spawning sites, freshwater rearing sites, freshwater migration corridors, estuarine areas, nearshore marine areas, and offshore areas.

The present distribution and abundance of steelhead in California has been greatly reduced from historical levels. In general, steelhead migrate to sea as two-year-old fish, spend two years in the ocean, and then return to fresh water to spawn. Peak spawning for steelhead occurs from December through April in small streams and tributaries. Unlike Pacific salmon, steelhead do not necessarily die after spawning, although repeat spawning rates are generally low and vary considerably among populations. Steelhead have traditionally been grouped into seasonal runs according to their peak migration period; in California there are well-defined winter, spring, and fall runs.

This species is known to occur within Soquel Creek; therefore, this species has a high potential to occur within the survey area.

Tidewater goby
The Tidewater goby is a federally Endangered species and a CDFW species of special concern. The tidewater goby is a small native goby found along the Pacific coast of California from the Smith River in Del Norte County, south to Agua Hedionda Lagoon in San Diego County. Local records for this species from the California Academy of Sciences show presence in the Paper Mill Creek and Rodeo Lagoon, the mouth of the Corte Madera Creek, in the vicinity of Lake Merced in San Francisco, and San Pablo Bay adjacent to the Sacramento-San Joaquin Estuary. Individuals of this species are in different developmental stages throughout the year. The spawning peak of this species in Rodeo Lagoon can be separated into two periods: from late March through July, and from late August through November. The male tidewater goby digs a vertical burrow approximately 100-200 mm into the sandy bottom in water 25-50 cm deep, which the male then guards after the female completes egg deposition. It has been reported that mollusks, insects, and crustaceans are the primary food for the tidewater goby.

This species is known to occur within Soquel Creek; therefore, this species has a high potential to occur within the survey area.

Nesting Avian Species
The California Fish and Game Code protects nesting birds, their eggs, and nests in several sections:
• Section 3503: Makes it illegal to take, possess, or destroy any bird's nest or eggs without reason. • Section 3503.5: Makes it illegal to take, possess, or destroy any bird of prey's nest or eggs, or the birds themselves.
• Section 3511: Protects 13 bird species that are fully protected. 413
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The nesting season varies by species and location, but for many birds in California, nesting season is typically from February to August. Nesting avian species that typically occur in the habitat type within and surrounding the survey area may include but is not limited to; cliff swallow (Petrochelidon pyrrhonota), dark-eyed junco (Junco hyemalis), Eurasian collared dove (Streptopelia decaocto), Anna’s hummingbird (Calypte anna), and house finch (Haemorhous mexicanus).

DD&A documented cliff swallow nests on the underside of Stockton Bridge during the May 14 reconnaissance survey (Attachment D – Photo 4) and several birds were observed foraging within and around Soquel Creek. Additionally, trees adjacent to Stockton Bridge may provide nesting habitat for several avian species.

Special-Status Plant Species
No special-status plant species were observed within the survey area during the survey or were determined unlikely to occur based on the species-specific reasons presented in Attachment C.

Potential Impacts and Typical Mitigation
Impact 1. Western pond turtle is known to occur within Soquel Creek and has a high potential to occur within the survey area. Construction-phase activities associated with the development of the project have the potential to impact (take) individual western pond turtles. This may include direct injury or mortality as a result of construction activities occurring within the channel of Soquel Creek. This is a potentially significant impact that can be reduced to a less than significant level with the implementation of the mitigation presented below.

Mitigation Measure 1a: Prior to construction activities, the project proponent shall retain a qualified biologist to conduct an Employee Education Program for the construction crew. The biologist shall meet with the construction crew at the project site at the onset of construction to educate the construction crew on the following: a) a review of the project boundaries; b) all special-status species that may be present, their habitat, and proper identification; c) the specific mitigation measures that will be incorporated into the construction effort; d) the general provisions and protections afforded by the regulatory agencies; and e) the proper procedures if a special-status animal is encountered within the project site.

Mitigation Measure 1b: To avoid or minimize impacts to western pond turtle, a qualified biologist shall conduct a pre-construction survey for western pond turtles and their nests within the project site no more than three days prior to construction. If a western pond turtle nest is found, it will be monitored and avoided until the eggs hatch. All western pond turtles discovered within the project site immediately prior to or during project activities shall be allowed to move out of the area of their own volition. If this is not feasible, they shall be captured by a qualified biologist and relocated out of harm's way to the nearest suitable habitat at least 100 feet upstream or downstream from the project site where the individual was found.

Impact 2. Central California coast steelhead and tidewater goby are known to occur within Soquel Creek and have a high potential to occur within the survey area. Construction-phase activities associated with the development of the project have the potential to impact (take) individuals of these species. This may include direct injury or mortality as a result of construction activities occurring within the channel of Soquel Creek.

This is a potentially significant impact that can be reduced to a less than significant level with the implementation of the mitigation presented below.
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Mitigation Measure 2a: The project proponent shall consult with the National Oceanic and Atmospheric Administration (NOAA) National Marine Fisheries Service (NMFS) to ensure compliance with ESA. ESA compliance may result in the need for incidental take coverage through Section 7 or Section 10 of the ESA. The resulting Biological Opinion (BO) and Incidental Take Statement may include typical conservation measures as described below in Mitigation Measures 2b-2g.

Mitigation Measure 2b: Project personnel shall ensure that trash and food items are contained in animal-proof containers and removed at least once a week to avoid attracting opportunistic predators such as coyotes. Plastic water bottles and plastic bags shall be picked up and removed daily even if not generated by on-site personnel.

Mitigation Measure 2c: The project shall utilize erosion control measures throughout all phases of the project where sediment runoff from exposed slopes could enter Soquel Creek.

Mitigation Measure 2d: Construction materials and/or equipment shall not be stockpiled or stored where they may be washed into Soquel Creek or cover adjacent riparian vegetation. Stockpiles shall be covered when measurable rain is forecasted.

Mitigation Measure 2e: All equipment that will be entering the project site shall be cleaned of materials deleterious to aquatic life including oil, grease, hydraulic fluid, soil, other debris and invasive species. Wash water containing mud or silt from washing or other operations shall not be allowed to enter Soquel Creek.

Mitigation Measure 2f: Qualified biologists with expertise in the areas of anadromous salmonid biology shall conduct fish relocation activities associated with construction, if determined necessary. Fish relocation shall be conducted in a manner which minimizes all potential risks to salmonids.

Fish relocation shall first use a seine net without a bag to herd fish out of the work site, if practicable, before capturing fish with other nets or using electrofishing techniques. Herding fish out of the work site with a seine will reduce the number of fish exposed to capture and electrofishing activities and reduce the number of fish subject to risks of mortality.

Salmonids shall be handled with extreme care and kept in water to the maximum extent possible during rescue activities. All captured fish must be kept in cool, shaded, and aerated water protected from excessive noise, jostling, or overcrowding. Fish shall not be held in buckets with potential predators. Fish will not be removed from this water except when released. Captured salmonids will be relocated as soon as possible to an instream location in which suitable habitat conditions are present to allow for adequate survival for transported fish and fish already present.

Mitigation Measure 2g: If any salmonids are found dead or injured, the biologist shall contact NMFS within 24-hours to review the activities resulting in the take and to determine if additional protective measures are required.

Impact 3. Several avian species have the potential to nest on Stockton Bridge and/or the trees adjacent to the bridge. Construction-phase activities associated with the development of the project have the potential to impact active nests either through direct impact (nest removal) or indirect impact (noise disturbance), resulting in nest abandonment or direct mortality. Impacts to active avian nests would be considered significant. This is a potentially significant impact that can be reduced to a less than significant level with the implementation of the mitigation presented below. 415
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Mitigation Measure 3: Construction activities that may directly (e.g., bridge removal) or indirectly affect (e.g., noise/ground disturbance) avian species nests shall be timed to avoid the nesting seasons (February 1 through September 15).

If construction activities must occur during the nesting season (February 1 through September 15), a qualified biologist shall conduct pre-construction surveys for nesting avian species within 500 feet of the proposed construction activities. Pre-construction surveys should be conducted no more than 7 days prior to the start of the construction activities during the early part of the breeding season (February through April) and no more than 14 days prior to the initiation of these activities during the late part of the breeding season (May through August).

If avian nests are identified during the pre-construction surveys, the qualified biologist would notify the contractor and an appropriate no-disturbance buffer would be imposed in which no construction activities or disturbance would take place (generally 500 feet in all directions for raptors; other avian species may have species-specific requirements) until the young of the year have fledged and are no longer reliant upon the nest or parental care for survival, as determined by a qualified biologist.

Once construction begins, the qualified biologist shall continuously monitor nests to detect behavioral changes resulting from the project. If behavioral changes resulting from the project occur, the no-disturbance buffer shall be increased.

Impact 4. Soquel Creek is a navigable waterway therefore it is considered waters of the US and the State. Additionally, Soquel Creek is subject to California Department of Fish and Wildlife (CDFW) jurisdiction under Section 1602 of CDFG code. Impacts associated with the installation of debris mitigation materials or with the removal of the existing bridge, to this sensitive habitat, would be considered significant. This is a potentially significant impact that can be reduced to a less than significant level with the implementation of the mitigation presented below.

Mitigation Measure 4: The project proponent shall coordinate with the ACOE, Regional Water Quality Control Board (RWQCB), and CDFW to procure a permit pursuant to the CWA Section 404, CWA Section 401, and CDFG Code Section 1602, respectively.

CONCLUSION & RECOMMENDATIONS
The discussion below provides a summary of the sensitive natural resources with the potential to occur within and adjacent to the survey area and regulatory permits that may be required if these resources are impacted. In addition, the summary below provides the main environmental concerns and permitting requirements for the alternatives considered.

Comparison of Project Alternatives
As described below, the similarity of the infrastructure proposed under Alternatives 1 through 5 would result in equal impacts to biological resources, regardless of which Alternative is implemented. Each Alternative would result in impacts to the three special-status species described above (western pond turtle, central California coast steelhead, and tidewater goby), as well as impacts to Waters of the U.S. and State.

Additionally, the survey area is located within the Coastal Zone and would result in impacts to the channel of Soquel Creek; therefore, the project is also under the jurisdiction of the California Coastal Commission and California Department of Fish and Wildlife. Impacts to these resources would likely require acquisition of the following regulatory permits:
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• United States Fish and Wildlife Service (USFWS) and National Marine Fisheries Service (NMFS): Section 7 of the Endangered Species Act (ESA).
• California Department of Fish and Wildlife (CDFW): Section 1602 of the California Fish and Game Code (Streambed Alteration Agreement).
• United States Army Corps of Engineers (ACOE): Section 404 of the Clean Water Act (CWA) and/or Rivers and Harbor Act Section 10 Permit.
• Central Coast Regional Water Quality Control Board (RWQCB): Section 401 of the CWA. • California Coastal Commission: Coastal Development Permit.

Alternative 1: Angle Fin
Alternative 1 would include installing fins onto the existing abutments within the channel of Soquel Creek.

The eastern most fin would be installed at an angle to minimize debris catch between the pier and creek wall. This Alternative would include installation of eight reinforced concrete piers within the channel of Soquel Creek. Implementation of Alternative 1 would result in impacts to the three special-status species described above, as well as impacts to Waters of the U.S. and State. This would require acquisition of the regulatory permits outlined above.

Alternative 2: Debris Deflector Cage
Alternative 2 would include installing debris deflector cages onto the existing abutments within the channel of Soquel Creek. This Alternative would include installation of three reinforced concrete piers on each cage within the channel of Soquel Creek, for a total of six piers. Alternative 2 would result in impacts to the same resources described above; therefore, there are no significant differences in the biological impact between the Alternatives and the same regulatory permits would be required.

Alternative 3: Galvanized Pier Poles
Alternative 3 would include installing galvanized pier poles embedded in concrete piers onto the existing abutments within the channel of Soquel Creek. This Alternative would include installation of six reinforced concrete piers on each cage within the channel of Soquel Creek, for a total of 12 piers. Alternative 3 would result in impacts to the same resources described above; therefore, there are no significant differences in the biological impact between the Alternatives and the same regulatory permits would be required.

However, the increased number of piers proposed under Alternative 3 may result in increased mitigation required by the regulatory agencies.

Alternative 4: Manufactured Floating Debris Sweeper
Alternative 4 would include the installation of two manufactured floating debris sweepers adjacent to the existing abutments within the channel of Soquel Creek. The sweepers would require one reinforced concrete pier each, for a total of two piers. The sweepers would rise and fall with the water level of the creek.

Alternative 4 would result in impacts to the same resources described above; therefore, there are no significant differences in the biological impact between the Alternatives and the same regulatory permits would be required. However, the decreased number of piers proposed under Alternative 4 may result in decreased mitigation required by the regulatory agencies.

Alternative 5: Clear Span Bridge
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Alternative 5 would include widening the bridge by 8 feet to accommodate an 8’ sidewalk, 5’ bike lane, and 12’ vehicle travel lane on each side, for a total width of 52 feet. The existing piers would be removed from the channel of Soquel Creek to support a clear span bridge. The existing timber piles will remain in place and the pier footings may remain in place; however, this will be determined at a later date. Alternative 5 would result in impacts to the same resources described above; therefore, the same regulatory permits would be required. However, no new impacts to the channel of Soquel Creek are proposed under this Alternative and existing structures within the channel are proposed for removal. Therefore, this Alternative may result in reduced mitigation requirements from the regulatory agencies.

Conclusion
Each proposed Alternative has the potential to impact federal and state-listed wildlife species and are likely to require acquisition of state and federal ITPs. Additionally, all Alternatives will impact Waters of the U.S. and/or State which will likely require acquisition of regulatory permits from the ACOE and RWQCB.

Additionally, the project is also under the jurisdiction of the California Coastal Commission and CDFW.

As identified above, the infrastructure proposed for Alternatives 1 through 5 are very similar and would result in almost identical impacts to the sensitive resources described in this report. For this reason, the environmental impact of Alternatives 1 through 5 would generally be the same. Therefore, due to the similarity of the proposed Alternatives, there is no preferred Alternative from a biological perspective.

However, the information outlined above regarding potential mitigation requirements from the regulatory agencies may be taken into account when choosing a project Alternative. 418
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References
Baldwin, B. G, et. al. 2012. The Jepson Manual – Vascular Plants of California, Second Edition, Thoroughly Revised and Expanded. University of California Press. Berkeley, CA. 1600 pp.

CDFW. 2018. Protocols for Surveying and Evaluating Impacts to Special Status Native Plant Populations and Natural Communities.
[CDFW] California Department of Fish and Game. 2024a. Natural Communities List. Available Online at: https://wildlife.ca.gov/Data/VegCAMP/Natural-Communities CDFW. 2024b. Special Animals List. Available online at
https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=109406 CDFW. 2024c. California Natural Diversity Database Rare Find 5 Report. Accessed April 2024.

California Native Plant Society (CNPS). 2001. Botanical Survey Guidelines.

CNPS. 2024. Inventory of Rare and Endangered Plants (online inventory, v8-03). California Native Plant Society. Sacramento, CA. Available online at: http://www.rareplants.cnps.org/ Ernst, C. H., and R. W. Barbour. 1972. Turtles of the United States. Univ. Kentucky Press, Lexington. 347pp.

Google LLC. 2023. Google Earth Pro Aerial Imagery.

Holland. 1994. The Western Pond Turtle; Habitat and History, 1993-1994 Final Report. Oregon Dept. of Fish and Wildlife, Portland, OR.

Jennings, M.R. and M.P. Hayes. 1994. Amphibian and reptile species of special concern in California. Final report to the California Department of Fish and Game, Inland Fisheries Division. 255 pp.

Matthews, M.A and M. Mitchell. 2015. The Plants of Monterey County; an Illustrated Field Key (Second Edition). California Native Plant Society, Sacramento, California. 446 pp.

Remsen, J.V. Jr. 1978. Bird species of special concern in California. California Dept. of Fish and Game, Nongame Wildlife Investigations, Wildlife Management Branch Administrative Report No. 78-1.

Sawyer, J.O., T. Keeler-Wolf, and J.M. Evens. 2009. A manual of California vegetation 2nd Edition.

California Native Plant Society, Sacramento, CA. 1300 pp.

Stebbins, R.C. 1972. California Amphibians and Reptiles. University of California Press, Berkeley, CA. 152 pp.

Stebbins, R.C. 1985. Western reptiles and amphibians. Houghton Mifflin Company, Boston, MA. 336 pp Stebbins, R.C. 2003.Western reptiles and amphibians, 3rd edition. Houghton Mifflin Company, New York, NY.533 p
Thelander, C. (ed.). 1994. Life on the edge: A guide to California’s endangered natural resources:
wildlife. BioSystems Books, Santa Cruz, CA.
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U.S. Army Corps of Engineers (ACOE). 1971. Navigable Waterways within the San Francisco District of the Army Corps of Engineers. Found Online at:
https://www.spn.usace.army.mil/Portals/68/docs/regulatory/1%20-%20Sect10waters.pdf ACOE. 2008. Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Arid West Region (Version 2.0). Ed. J.S. Wakeley, R.W. Lichvar, and C.V. Noble. ERDC/EL TR-08-28.

Vicksburg, MS: U.S. Army Engineer Research and Development Center. 123 pp. [USGS] U.S. Geologic Survey. 2023. National Hydrography Dataset. Available online at:
https://www.usgs.gov/programs/national-geospatial-program/national-map [USDA-NRCS] U.S. Department of Agriculture – Natural Resources Conservation Service. 2019. Web Soil Survey. Available online at: https://websoilsurvey.nrcs.usda.gov/app/ USFWS. 2000. Guidelines for Conducting and Reporting Botanical Inventories for Federally Listed, Proposed, and Candidate Plants.
[USFWS] U.S. Fish and Wildlife Service. 2024a. Information Planning and Consultation Reports.

Accessed September 2023.

USFWS. 2023b. National Wetlands Inventory. Available online at:
https://www.fws.gov/program/national-wetlands-inventory/wetlands-mapper Wetland Training Institute, Inc. 1995. Field Guide for Wetland Delineation: 1987 Corps of Engineers Manual. Glenwood, NM. WTI 02-1. 143 pp.

Williams, D. 1986. Mammalian species of special concern in California. California Department of Fish and Game Report 86-1. 112 pp.

Williams, P., R. Thorp, L. Richardson, and S. Colla. 2014. Bumble Bees of North America: An Identification Guide. Princeton University Press, Princeton, New Jersey. 209 pp.

Zeiner, D. C., W. F. Laudenslayer, Jr., K. E. Mayer, and M. White (eds.). 1988. California’s wildlife, Volume I: Amphibians and reptiles. California Department of Fish and Game, Sacramento, CA. 272 pp.

Zeiner, D. C., W. F. Laudenslayer, Jr., K. E. Mayer, and M. White (eds.). 1990. California’s Wildlife, Volume II: Birds. California Department of Fish and Game, Sacramento, CA.731 pp.

Attachments
Attachment A: Figures 1-4
Attachment B: CNDDB and IPaC
Attachment C: Special-Status Species Table
Attachment D: Site Photos
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Attachment A: Figures 1-4
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Item 9 A.

Project Location 1
5/24/2024
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Path: C:\GIS\2024-24 Stockton Bridge Debris\2024-24 Stockton Bridge\2024-24 Stockton Bridge.aprx Scale
Date
Denise Duffy & Associates, Inc.

Planning and Environmental Consulting
Figure
0 0.13 0.25 0.5 Miles
1:18,000
Project Location
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Survey Area 2
5/24/2024
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Path: C:\GIS\2024-24 Stockton Bridge Debris\2024-24 Stockton Bridge\2024-24 Stockton Bridge.aprx Scale
Date
Denise Duffy & Associates, Inc.

Planning and Environmental Consulting
Figure
0 25 50 100 Feet Survey Area
1:450
Soquel Creek
Wharf Road
Cliff Drive
Stockton Ave
423
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Vegetation Types 3
5/24/2024
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Date
Denise Duffy & Associates, Inc.

Planning and Environmental Consulting
Figure
0 25 50 100 Feet Survey Area
Vegetation Types
Developed
Riverine
1:400
424
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Waters of the U.S. and/or State 4
6/7/2024
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Date
Denise Duffy & Associates, Inc.

Planning and Environmental Consulting
Figure
0 25 50 100 Feet Survey Area
Waters of the U.S. and/or State
1:400
425
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Attachment B: CNDDB and IPaC
426
Item 9 A.

Species Element Code Federal Status State Status Global Rank State Rank Rare Plant
Rank/CDFW
SSC or FP
Accipiter cooperii
Cooper's hawk
ABNKC12040 None None G5 S4 WL
Adela oplerella
Opler's longhorn moth
IILEE0G040 None None G2 S2
Agelaius tricolor
tricolored blackbird
ABPBXB0020 None Threatened G1G2 S2 SSC
Agrostis blasdalei
Blasdale's bent grass
PMPOA04060 None None G2G3 S2 1B.2
Ambystoma californiense pop. 1
California tiger salamander - central California DPS
AAAAA01181 Threatened Threatened G2G3T3 S3 WL
Ambystoma macrodactylum croceum
Santa Cruz long-toed salamander
AAAAA01082 Endangered Endangered G5T1T2 S2 FP
Amsinckia lunaris
bent-flowered fiddleneck
PDBOR01070 None None G3 S3 1B.2
Aneides niger
Santa Cruz black salamander
AAAAD01070 None None G3 S3 SSC
Anniella pulchra
Northern California legless lizard
ARACC01020 None None G3 S2S3 SSC
Anomobryum julaceum
slender silver moss
NBMUS80010 None None G5? S2 4.2
Antrozous pallidus
pallid bat
AMACC10010 None None G4 S3 SSC
Aphyllon robbinsii
Robbins' broomrape
PDORO040Q0 None None G1 S1 1B.1
Aquila chrysaetos
golden eagle
ABNKC22010 None None G5 S3 FP
Arctostaphylos andersonii
Anderson's manzanita
PDERI04030 None None G2 S2 1B.2
Arctostaphylos hookeri ssp. hookeri
Hooker's manzanita
PDERI040J1 None None G3T2 S2 1B.2
Arctostaphylos pajaroensis
Pajaro manzanita
PDERI04100 None None G1 S1 1B.1
Arctostaphylos silvicola
Bonny Doon manzanita
PDERI041F0 None None G1 S1 1B.2
Ardea herodias
great blue heron
ABNGA04010 None None G5 S4
Arenaria paludicola
marsh sandwort
PDCAR040L0 Endangered Endangered G1 S1 1B.1
Quad<span style='color:Red'> IS </span>(Felton (3712211)<span style='color:Red'> OR </span>Laurel (3712118)<span style='color:Red'> OR </span>Loma Prieta (3712117)<span style='color:Red'> OR </span>Santa Cruz (3612281)<span style='color:Red'> OR </span>Soquel (3612188)<span style='color:Red'> OR </span>Watsonville West (3612187)) Query Criteria:

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Species Element Code Federal Status State Status Global Rank State Rank Rare Plant
Rank/CDFW
SSC or FP
Astragalus agnicidus
Humboldt County milk-vetch
PDFAB0F080 None Endangered G2 S2 1B.1
Athene cunicularia
burrowing owl
ABNSB10010 None None G4 S2 SSC
Bombus caliginosus
obscure bumble bee
IIHYM24380 None None G2G3 S1S2
Bombus crotchii
Crotch's bumble bee
IIHYM24480 None Candidate
Endangered
G2 S2
Bombus occidentalis
western bumble bee
IIHYM24252 None Candidate
Endangered
G3 S1
Bombus pensylvanicus
American bumble bee
IIHYM24260 None None G3G4 S2
Brachyramphus marmoratus
marbled murrelet
ABNNN06010 Threatened Endangered G3 S2
Calyptridium parryi var. hesseae
Santa Cruz Mountains pussypaws
PDPOR09052 None None G3G4T2 S2 1B.1
Carex comosa
bristly sedge
PMCYP032Y0 None None G5 S2 2B.1
Carex saliniformis
deceiving sedge
PMCYP03BY0 None None G2 S2 1B.2
Ceanothus ferrisiae
Coyote ceanothus
PDRHA041N0 Endangered None G1 S1 1B.1
Central Dune Scrub
Central Dune Scrub
CTT21320CA None None G2 S2.2
Centromadia parryi ssp. congdonii
Congdon's tarplant
PDAST4R0P1 None None G3T2 S2 1B.1
Charadrius nivosus nivosus
western snowy plover
ABNNB03031 Threatened None G3T3 S3 SSC
Chorizanthe pungens var. hartwegiana
Ben Lomond spineflower
PDPGN040M1 Endangered None G2T1 S1 1B.1
Chorizanthe pungens var. pungens
Monterey spineflower
PDPGN040M2 Threatened None G2T2 S2 1B.2
Chorizanthe robusta var. hartwegii
Scotts Valley spineflower
PDPGN040Q1 Endangered None G2T1 S1 1B.1
Chorizanthe robusta var. robusta
robust spineflower
PDPGN040Q2 Endangered None G2T1 S1 1B.1
Cicindela hirticollis gravida
sandy beach tiger beetle
IICOL02101 None None G5T2 S2
Cicindela ohlone
Ohlone tiger beetle
IICOL026L0 Endangered None G1 S1
Clarkia concinna ssp. automixa
Santa Clara red ribbons
PDONA050A1 None None G5?T3 S3 4.3
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California Natural Diversity Database
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Species Element Code Federal Status State Status Global Rank State Rank Rare Plant
Rank/CDFW
SSC or FP
Coastal and Valley Freshwater Marsh
Coastal and Valley Freshwater Marsh
CTT52410CA None None G3 S2.1
Coelus globosus
globose dune beetle
IICOL4A010 None None G1G2 S1S2
Collinsia multicolor
San Francisco collinsia
PDSCR0H0B0 None None G2 S2 1B.2
Corynorhinus townsendii
Townsend's big-eared bat
AMACC08010 None None G4 S2 SSC
Coturnicops noveboracensis
yellow rail
ABNME01010 None None G4 S2 SSC
Cypseloides niger
black swift
ABNUA01010 None None G4 S3 SSC
Dacryophyllum falcifolium
tear drop moss
NBMUS8Z010 None None G2 S2 1B.3
Danaus plexippus plexippus pop. 1
monarch - California overwintering population
IILEPP2012 Candidate None G4T1T2Q S2
Dicamptodon ensatus
California giant salamander
AAAAH01020 None None G2G3 S2S3 SSC
Dipodomys venustus venustus
Santa Cruz kangaroo rat
AMAFD03042 None None G4T1 S1
Eastwoodiella californica
swamp harebell
PDCAM02060 None None G3 S3 1B.2
Elanus leucurus
white-tailed kite
ABNKC06010 None None G5 S3S4 FP
Emys marmorata
western pond turtle
ARAAD02030 Proposed
Threatened
None G3G4 S3 SSC
Eriogonum nudum var. decurrens
Ben Lomond buckwheat
PDPGN08492 None None G5T1 S1 1B.1
Erysimum ammophilum
sand-loving wallflower
PDBRA16010 None None G2 S2 1B.2
Erysimum teretifolium
Santa Cruz wallflower
PDBRA160N0 Endangered Endangered G1 S1 1B.1
Eucyclogobius newberryi
tidewater goby
AFCQN04010 Endangered None G3 S3 SSC
Euphilotes enoptes smithi
Smith's blue butterfly
IILEPG2026 Endangered None G5T2 S2
Fissidens pauperculus
minute pocket moss
NBMUS2W0U0 None None G3? S2 1B.2
Fissilicreagris imperialis
Empire Cave pseudoscorpion
ILARAE5010 None None G1 S1
Gilia tenuiflora ssp. arenaria
Monterey gilia
PDPLM041P2 Endangered Threatened G3G4T2 S2 1B.2
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Species Element Code Federal Status State Status Global Rank State Rank Rare Plant
Rank/CDFW
SSC or FP
Hesperocyparis abramsiana var. abramsiana
Santa Cruz cypress
PGCUP04081 Threatened Endangered G1T1 S1 1B.2
Hoita strobilina
Loma Prieta hoita
PDFAB5Z030 None None G2? S2? 1B.1
Holocarpha macradenia
Santa Cruz tarplant
PDAST4X020 Threatened Endangered G1 S1 1B.1
Horkelia cuneata var. sericea
Kellogg's horkelia
PDROS0W043 None None G4T1? S1? 1B.1
Horkelia marinensis
Point Reyes horkelia
PDROS0W0B0 None None G2 S2 1B.2
Lasiurus cinereus
hoary bat
AMACC05032 None None G3G4 S4
Lasthenia californica ssp. macrantha
perennial goldfields
PDAST5L0C5 None None G3T2 S2 1B.2
Laterallus jamaicensis coturniculus
California black rail
ABNME03041 None Threatened G3T1 S2 FP
Lavinia exilicauda harengus
Monterey hitch
AFCJB19013 None None G4T3 S3 SSC
Lessingia micradenia var. glabrata
smooth lessingia
PDAST5S062 None None G2T2 S2 1B.2
Linderiella occidentalis
California linderiella
ICBRA06010 None None G2G3 S2S3
Lytta moesta
moestan blister beetle
IICOL4C020 None None G2 S2
Malacothamnus arcuatus
arcuate bush-mallow
PDMAL0Q0E0 None None G2Q S2 1B.2
Malacothamnus hallii
Hall's bush-mallow
PDMAL0Q0F0 None None G2 S2 1B.2
Margaritifera falcata
western pearlshell
IMBIV27020 None None G5 S1S2
Maritime Coast Range Ponderosa Pine Forest
Maritime Coast Range Ponderosa Pine Forest
CTT84132CA None None G1 S1.1
Meta dolloff
Dolloff Cave spider
ILARA17010 None None G3 S3
Microseris paludosa
marsh microseris
PDAST6E0D0 None None G2 S2 1B.2
Monardella sinuata ssp. nigrescens
northern curly-leaved monardella
PDLAM18162 None None G3T2 S2 1B.2
Monolopia gracilens
woodland woollythreads
PDAST6G010 None None G3 S3 1B.2
Neochthonius imperialis
Empire Cave pseudoscorpion
ILARAD1010 None None G1 S1
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Species Element Code Federal Status State Status Global Rank State Rank Rare Plant
Rank/CDFW
SSC or FP
Neotoma fuscipes annectens
San Francisco dusky-footed woodrat
AMAFF08082 None None G5T2T3 S2S3 SSC
North Central Coast Drainage Sacramento
Sucker/Roach River
North Central Coast Drainage Sacramento
Sucker/Roach River
CARA2623CA None None GNR SNR
Northern Maritime Chaparral
Northern Maritime Chaparral
CTT37C10CA None None G1 S1.2
Oncorhynchus kisutch pop. 4
coho salmon - central California coast ESU
AFCHA02034 Endangered Endangered G5T2Q S2
Oncorhynchus mykiss irideus pop. 8
steelhead - central California coast DPS
AFCHA0209G Threatened None G5T3Q S3 SSC
Oncorhynchus mykiss irideus pop. 9
steelhead - south-central California coast DPS
AFCHA0209H Threatened None G5T2Q S2 SSC
Pandion haliaetus
osprey
ABNKC01010 None None G5 S4 WL
Pedicularis dudleyi
Dudley's lousewort
PDSCR1K180 None Rare G2 S2 1B.2
Penstemon rattanii var. kleei
Santa Cruz Mountains beardtongue
PDSCR1L5B1 None None G4T2 S2 1B.2
Pentachaeta bellidiflora
white-rayed pentachaeta
PDAST6X030 Endangered Endangered G1 S1 1B.1
Philanthus nasalis
Antioch specid wasp
IIHYM20010 None None G2 S2
Piperia candida
white-flowered rein orchid
PMORC1X050 None None G3? S3 1B.2
Plagiobothrys chorisianus var. chorisianus
Choris' popcornflower
PDBOR0V061 None None G3T1Q S1 1B.2
Plagiobothrys diffusus
San Francisco popcornflower
PDBOR0V080 None Endangered G1Q S1 1B.1
Polygonum hickmanii
Scotts Valley polygonum
PDPGN0L310 Endangered Endangered G1 S1 1B.1
Polyphylla barbata
Mount Hermon (=barbate) June beetle
IICOL68030 Endangered None G1 S2
Rana boylii pop. 4
foothill yellow-legged frog - central coast DPS
AAABH01054 Threatened Endangered G3T2 S2
Rana draytonii
California red-legged frog
AAABH01022 Threatened None G2G3 S2S3 SSC
Riparia riparia
bank swallow
ABPAU08010 None Threatened G5 S3
Scaphinotus behrensi
Behrens' snail-eating beetle
IICOL4L070 None None G2G4 S2S4
Senecio aphanactis
chaparral ragwort
PDAST8H060 None None G3 S2 2B.2
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Species Element Code Federal Status State Status Global Rank State Rank Rare Plant
Rank/CDFW
SSC or FP
Sidalcea malachroides
maple-leaved checkerbloom
PDMAL110E0 None None G3 S3 4.2
Stebbinsoseris decipiens
Santa Cruz microseris
PDAST6E050 None None G2 S2 1B.2
Stygobromus imperialis
Empire Cave amphipod
ICMAL05E30 None None G1 S1
Stygobromus mackenziei
Mackenzie's Cave amphipod
ICMAL05530 None None G1 S1
Taxidea taxus
American badger
AMAJF04010 None None G5 S3 SSC
Thaleichthys pacificus
eulachon
AFCHB04010 Threatened None G5 S1 SSC
Trifolium buckwestiorum
Santa Cruz clover
PDFAB402W0 None None G2 S2 1B.1
Trifolium polyodon
Pacific Grove clover
PDFAB402H0 None Rare G1 S1 1B.1
Trimerotropis infantilis
Zayante band-winged grasshopper
IIORT36030 Endangered None G1 S1
Tryonia imitator
mimic tryonia (=California brackishwater snail)
IMGASJ7040 None None G2 S2
Record Count: 113
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IPaC resource list
This report is an automatically generated list of species and other resources such as critical habitat (collectively referred to as trust resources) under the U.S. Fish and Wildlife Service's (USFWS) jurisdiction that are known or expected to be on or near the project area referenced below. The list may also include trust resources that occur outside of the project area, but that could potentially be directly or indirectly affected by activities in the project area. However, determining the likelihood and extent of effects a project may have on trust resources typically requires gathering additional site-specific (e.g., vegetation/species surveys) and project-specific (e.g., magnitude and timing of proposed activities) information.

Below is a summary of the project information you provided and contact information for the USFWS office(s) with jurisdiction in the defined project area. Please read the introduction to each section that follows (Endangered Species, Migratory Birds, USFWS Facilities, and NWI Wetlands) for additional information applicable to the trust resources addressed in that section.

Location
Santa Cruz County, California
Local office
Ventura Fish And Wildlife Office
 (805) 644-1766
 (805) 644-3958
 [email protected]
2493 Portola Road, Suite B
Ventura, CA 93003-7726
https://www.fws.gov/Ventura
IPaC Information for Planning and Consultation U.S. Fish & Wildlife Service 433
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Endangered species
This resource list is for informational purposes only and does not constitute an analysis of project level impacts.

The primary information used to generate this list is the known or expected range of each species. Additional areas of influence (AOI) for species are also considered. An AOI includes areas outside of the species range if the species could be indirectly affected by activities in that area (e.g., placing a dam upstream of a fish population even if that fish does not occur at the dam site, may indirectly impact the species by reducing or eliminating water flow downstream). Because species can move, and site conditions can change, the species on this list are not guaranteed to be found on or near the project area. To fully determine any potential effects to species, additional site-specific and project-specific information is often required.

Section 7 of the Endangered Species Act requires Federal agencies to "request of the Secretary information whether any species which is listed or proposed to be listed may be present in the area of such proposed action" for any project that is conducted, permitted, funded, or licensed by any Federal agency. A letter from the local office and a species list which fulfills this requirement can only be obtained by requesting an official species list from either the Regulatory Review section in IPaC (see directions below) or from the local field office directly.

For project evaluations that require USFWS concurrence/review, please return to the IPaC website and request an official species list by doing the following:

1. Draw the project location and click CONTINUE.

2. Click DEFINE PROJECT.

3. Log in (if directed to do so).

4. Provide a name and description for your project.

5. Click REQUEST SPECIES LIST.

Listed species and their critical habitats are managed by the Ecological Services Program of the U.S. Fish and Wildlife Service (USFWS) and the fisheries division of the National Oceanic and Atmospheric Administration (NOAA Fisheries ).

Species and critical habitats under the sole responsibility of NOAA Fisheries are not shown on this list. Please contact NOAA Fisheries for species under their jurisdiction.

1. Species listed under the Endangered Species Act are threatened or endangered; IPaC also shows species that are candidates, or proposed, for listing. See the listing status page for more information. IPaC only shows species that are regulated by USFWS (see FAQ).

2. NOAA Fisheries, also known as the National Marine Fisheries Service (NMFS), is an office of the National Oceanic and Atmospheric Administration within the Department of Commerce.

The following species are potentially affected by activities in this location:

Birds
1 2

NAME STATUS
California Condor Gymnogyps californianus
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/8193
Endangered
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Reptiles
Amphibians
California Least Tern Sternula antillarum browni
Wherever found
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/8104
Endangered
Least Bell's Vireo Vireo bellii pusillus
Wherever found
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/5945
Endangered
Marbled Murrelet Brachyramphus marmoratus
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/4467
Threatened
Short-tailed Albatross Phoebastria (=Diomedea) albatrus Wherever found
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/433
Endangered
Western Snowy Plover Charadrius nivosus nivosus
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/8035
Threatened
Yellow-billed Cuckoo Coccyzus americanus
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/3911
Threatened

NAME STATUS
Northwestern Pond Turtle Actinemys marmorata
Wherever found
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/1111
Proposed Threatened
San Francisco Garter Snake Thamnophis sirtalis tetrataenia Wherever found
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/5956
Endangered

NAME STATUS
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Fishes
Insects
Flowering Plants
California Red-legged Frog Rana draytonii
Wherever found
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/2891
Threatened
California Tiger Salamander Ambystoma californiense
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/2076
Threatened
Foothill Yellow-legged Frog Rana boylii
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/5133
Threatened

NAME STATUS
Tidewater Goby Eucyclogobius newberryi
Wherever found
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/57
Endangered

NAME STATUS
Monarch Butterfly Danaus plexippus
Wherever found
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/9743
Candidate

NAME STATUS
Lassics Lupine Lupinus constancei
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/7976
Endangered
Marsh Sandwort Arenaria paludicola
Wherever found
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/2229
Endangered
Monterey Gilia Gilia tenuiflora ssp. arenaria
Wherever found
No critical habitat has been designated for this species. https://ecos.fws.gov/ecp/species/856
Endangered
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Critical habitats
Potential effects to critical habitat(s) in this location must be analyzed along with the endangered species themselves.

There are no critical habitats at this location.

You are still required to determine if your project(s) may have effects on all above listed species.

Bald & Golden Eagles
Santa Cruz Tarplant Holocarpha macradenia
Wherever found
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/6832
Threatened
Scotts Valley Polygonum Polygonum hickmanii
Wherever found
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/3222
Endangered
Scotts Valley Spineflower Chorizanthe robusta var. hartwegii Wherever found
There is final critical habitat for this species. Your location does not overlap the critical habitat.
https://ecos.fws.gov/ecp/species/7108
Endangered
Bald and golden eagles are protected under the Bald and Golden Eagle Protection Act and the Migratory Bird Treaty Act .

Any person or organization who plans or conducts activities that may result in impacts to bald or golden eagles, or their habitats , should follow appropriate regulations and consider implementing appropriate conservation measures, as described in the links below. Specifically, please review the "Supplemental Information on Migratory Birds and Eagles".

Additional information can be found using the following links:

Eagle Management https://www.fws.gov/program/eagle-management Measures for avoiding and minimizing impacts to birds https://www.fws.gov/library/collections/avoiding-andminimizing-incidental-take-migratory-birds Nationwide conservation measures for birds https://www.fws.gov/sites/default/files/documents/nationwidestandard-conservation-measures.pdf Supplemental Information for Migratory Birds and Eagles in IPaC https://www.fws.gov/media/supplementalinformation-migratory-birds-and-bald-and-golden-eagles-may-occur-project-action 1 2
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There are likely bald eagles present in your project area. For additional information on bald eagles, refer to Bald Eagle Nesting and Sensitivity to Human Activity
For guidance on when to schedule activities or implement avoidance and minimization measures to reduce impacts to migratory birds on your list, see the PROBABILITY OF PRESENCE SUMMARY below to see when these birds are most likely to be present and breeding in your project area.

BREEDING SEASON
Probability of Presence Summary
The graphs below provide our best understanding of when birds of concern are most likely to be present in your project area. This information can be used to tailor and schedule your project activities to avoid or minimize impacts to birds. Please make sure you read "Supplemental Information on Migratory Birds and Eagles", specifically the FAQ section titled "Proper Interpretation and Use of Your Migratory Bird Report" before using or attempting to interpret this report.

Probability of Presence ( )
Each green bar represents the bird's relative probability of presence in the 10km grid cell(s) your project overlaps during a particular week of the year. (A year is represented as 12 4-week months.) A taller bar indicates a higher probability of species presence. The survey effort (see below) can be used to establish a level of confidence in the presence score. One can have higher confidence in the presence score if the corresponding survey effort is also high.

How is the probability of presence score calculated? The calculation is done in three steps:

1. The probability of presence for each week is calculated as the number of survey events in the week where the species was detected divided by the total number of survey events for that week. For example, if in week 12 there were 20 survey events and the Spotted Towhee was found in 5 of them, the probability of presence of the Spotted Towhee in week 12 is 0.25.

2. To properly present the pattern of presence across the year, the relative probability of presence is calculated.

This is the probability of presence divided by the maximum probability of presence across all weeks. For example, imagine the probability of presence in week 20 for the Spotted Towhee is 0.05, and that the probability of presence at week 12 (0.25) is the maximum of any week of the year. The relative probability of presence on week 12 is 0.25/0.25 = 1; at week 20 it is 0.05/0.25 = 0.2.

3. The relative probability of presence calculated in the previous step undergoes a statistical conversion so that all possible values fall between 0 and 10, inclusive. This is the probability of presence score.

To see a bar's probability of presence score, simply hover your mouse cursor over the bar.

Breeding Season ( )
Yellow bars denote a very liberal estimate of the time-frame inside which the bird breeds across its entire range. If there are no yellow bars shown for a bird, it does not breed in your project area.

Survey Effort ( )
NAME
Bald Eagle Haliaeetus leucocephalus
This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities.

Breeds Jan 1 to Aug 31
Golden Eagle Aquila chrysaetos
This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities.
https://ecos.fws.gov/ecp/species/1680
Breeds Jan 1 to Aug 31
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probability of presence breeding season survey effort no data Vertical black lines superimposed on probability of presence bars indicate the number of surveys performed for that species in the 10km grid cell(s) your project area overlaps. The number of surveys is expressed as a range, for example, 33 to 64 surveys.

To see a bar's survey effort range, simply hover your mouse cursor over the bar.

No Data ( )
A week is marked as having no data if there were no survey events for that week.

Survey Timeframe
Surveys from only the last 10 years are used in order to ensure delivery of currently relevant information. The exception to this is areas off the Atlantic coast, where bird returns are based on all years of available data, since data in these areas is currently much more sparse.

SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Bald Eagle
Non-BCC Vulnerable
Golden Eagle
Non-BCC Vulnerable
What does IPaC use to generate the potential presence of bald and golden eagles in my specified location? The potential for eagle presence is derived from data provided by the Avian Knowledge Network (AKN). The AKN data is based on a growing collection of survey, banding, and citizen science datasets and is queried and filtered to return a list of those birds reported as occurring in the 10km grid cell(s) which your project intersects, and that have been identified as warranting special attention because they are a BCC species in that area, an eagle (Eagle Act requirements may apply). To see a list of all birds potentially present in your project area, please visit the Rapid Avian Information Locator (RAIL) Tool.

What does IPaC use to generate the probability of presence graphs of bald and golden eagles in my specified location? The Migratory Bird Resource List is comprised of USFWS Birds of Conservation Concern (BCC) and other species that may warrant special attention in your project location.

The migratory bird list generated for your project is derived from data provided by the Avian Knowledge Network (AKN). The AKN data is based on a growing collection of survey, banding, and citizen science datasets and is queried and filtered to return a list of those birds reported as occurring in the 10km grid cell(s) which your project intersects, and that have been identified as warranting special attention because they are a BCC species in that area, an eagle (Eagle Act requirements may apply), or a species that has a particular vulnerability to offshore activities or development.

Again, the Migratory Bird Resource list includes only a subset of birds that may occur in your project area. It is not representative of all birds that may occur in your project area. To get a list of all birds potentially present in your project area, please visit the Rapid Avian Information Locator (RAIL) Tool.

What if I have eagles on my list?
If your project has the potential to disturb or kill eagles, you may need to obtain a permit to avoid violating the Eagle Act should such impacts occur. Please contact your local Fish and Wildlife Service Field Office if you have questions.

Migratory birds
Certain birds are protected under the Migratory Bird Treaty Act and the Bald and Golden Eagle Protection Act .

Any person or organization who plans or conducts activities that may result in impacts to migratory birds, eagles, and their habitats should follow appropriate regulations and consider implementing appropriate conservation measures, as described in the links below. Specifically, please review the "Supplemental Information on Migratory 1 2
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Item 9 A.

The birds listed below are birds of particular concern either because they occur on the USFWS Birds of Conservation Concern (BCC) list or warrant special attention in your project location. To learn more about the levels of concern for birds on your list and how this list is generated, see the FAQ below. This is not a list of every bird you may find in this location, nor a guarantee that every bird on this list will be found in your project area. To see exact locations of where birders and the general public have sighted birds in and around your project area, visit the E-bird data mapping tool (Tip: enter your location, desired date range and a species on your list). For projects that occur off the Atlantic Coast, additional maps and models detailing the relative occurrence and abundance of bird species on your list are available. Links to additional information about Atlantic Coast birds, and other important information about your migratory bird list, including how to properly interpret and use your migratory bird report, can be found below.

For guidance on when to schedule activities or implement avoidance and minimization measures to reduce impacts to migratory birds on your list, see the PROBABILITY OF PRESENCE SUMMARY below to see when these birds are most likely to be present and breeding in your project area.

BREEDING SEASON
Birds and Eagles".

1. The Migratory Birds Treaty Act of 1918.

2. The Bald and Golden Eagle Protection Act of 1940.

Additional information can be found using the following links:

Eagle Management https://www.fws.gov/program/eagle-management Measures for avoiding and minimizing impacts to birds https://www.fws.gov/library/collections/avoiding-andminimizing-incidental-take-migratory-birds Nationwide conservation measures for birds https://www.fws.gov/sites/default/files/ documents/nationwidestandard-conservation-measures.pdf Supplemental Information for Migratory Birds and Eagles in IPaC https://www.fws.gov/media/supplementalinformation-migratory-birds-and-bald-and-golden-eagles-may-occur-project-action NAME
Allen's Hummingbird Selasphorus sasin
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/9637
Breeds Feb 1 to Jul 15
Bald Eagle Haliaeetus leucocephalus
This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities.

Breeds Jan 1 to Aug 31
Belding's Savannah Sparrow Passerculus sandwichensis beldingi This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
https://ecos.fws.gov/ecp/species/8
Breeds Apr 1 to Aug 15
Black Oystercatcher Haematopus bachmani
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/9591
Breeds Apr 15 to Oct 31
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Black Skimmer Rynchops niger
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/5234
Breeds May 20 to Sep 15
Black Swift Cypseloides niger
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/8878
Breeds Jun 15 to Sep 10
Black Tern Chlidonias niger surinamenisis
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/3093
Breeds May 15 to Aug 20
Black Turnstone Arenaria melanocephala
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds elsewhere
Bullock's Oriole Icterus bullockii
This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
Breeds Mar 21 to Jul 25
California Gull Larus californicus
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds Mar 1 to Jul 31
California Thrasher Toxostoma redivivum
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds Jan 1 to Jul 31
Clark's Grebe Aechmophorus clarkii
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds Jun 1 to Aug 31
Common Yellowthroat Geothlypis trichas sinuosa
This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
https://ecos.fws.gov/ecp/species/2084
Breeds May 20 to Jul 31
Elegant Tern Thalasseus elegans
This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
https://ecos.fws.gov/ecp/species/8561
Breeds Apr 5 to Aug 5
Golden Eagle Aquila chrysaetos
This is not a Bird of Conservation Concern (BCC) in this area, but warrants attention because of the Eagle Act or for potential susceptibilities in offshore areas from certain types of development or activities.
https://ecos.fws.gov/ecp/species/1680
Breeds Jan 1 to Aug 31
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Heermann's Gull Larus heermanni
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds Mar 15 to Aug 31
Lawrence's Goldfinch Spinus lawrencei
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/9464
Breeds Mar 20 to Sep 20
Marbled Godwit Limosa fedoa
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/9481
Breeds elsewhere
Northern Harrier Circus hudsonius
This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
https://ecos.fws.gov/ecp/species/8350
Breeds Apr 1 to Sep 15
Nuttall's Woodpecker Dryobates nuttallii
This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
https://ecos.fws.gov/ecp/species/9410
Breeds Apr 1 to Jul 20
Oak Titmouse Baeolophus inornatus
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/9656
Breeds Mar 15 to Jul 15
Olive-sided Flycatcher Contopus cooperi
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/3914
Breeds May 20 to Aug 31
Red Knot Calidris canutus roselaari
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/8880
Breeds elsewhere
Santa Barbara Song Sparrow Melospiza melodia graminea
This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
https://ecos.fws.gov/ecp/species/5513
Breeds Mar 1 to Sep 5
Short-billed Dowitcher Limnodromus griseus
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/9480
Breeds elsewhere
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Probability of Presence Summary
The graphs below provide our best understanding of when birds of concern are most likely to be present in your project area. This information can be used to tailor and schedule your project activities to avoid or minimize impacts to birds. Please make sure you read "Supplemental Information on Migratory Birds and Eagles", specifically the FAQ section titled "Proper Interpretation and Use of Your Migratory Bird Report" before using or attempting to interpret this report.

Probability of Presence ( )
Each green bar represents the bird's relative probability of presence in the 10km grid cell(s) your project overlaps during a particular week of the year. (A year is represented as 12 4-week months.) A taller bar indicates a higher probability of species presence. The survey effort (see below) can be used to establish a level of confidence in the presence score. One can have higher confidence in the presence score if the corresponding survey effort is also high.

How is the probability of presence score calculated? The calculation is done in three steps:

1. The probability of presence for each week is calculated as the number of survey events in the week where the species was detected divided by the total number of survey events for that week. For example, if in week 12 there were 20 survey events and the Spotted Towhee was found in 5 of them, the probability of presence of the Spotted Towhee in week 12 is 0.25.

2. To properly present the pattern of presence across the year, the relative probability of presence is calculated.

This is the probability of presence divided by the maximum probability of presence across all weeks. For example, imagine the probability of presence in week 20 for the Spotted Towhee is 0.05, and that the probability of presence at week 12 (0.25) is the maximum of any week of the year. The relative probability of presence on week 12 is 0.25/0.25 = 1; at week 20 it is 0.05/0.25 = 0.2.

Tricolored Blackbird Agelaius tricolor
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/3910
Breeds Mar 15 to Aug 10
Western Grebe aechmophorus occidentalis
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.
https://ecos.fws.gov/ecp/species/6743
Breeds Jun 1 to Aug 31
Western Gull Larus occidentalis
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds Apr 21 to Aug 25
Western Screech-owl Megascops kennicottii cardonensis
This is a Bird of Conservation Concern (BCC) only in particular Bird Conservation Regions (BCRs) in the continental USA
Breeds Mar 1 to Jun 30
Willet Tringa semipalmata
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds elsewhere
Wrentit Chamaea fasciata
This is a Bird of Conservation Concern (BCC) throughout its range in the continental USA and Alaska.

Breeds Mar 15 to Aug 10
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probability of presence breeding season survey effort no data

3. The relative probability of presence calculated in the previous step undergoes a statistical conversion so that all possible values fall between 0 and 10, inclusive. This is the probability of presence score.

To see a bar's probability of presence score, simply hover your mouse cursor over the bar.

Breeding Season ( )
Yellow bars denote a very liberal estimate of the time-frame inside which the bird breeds across its entire range. If there are no yellow bars shown for a bird, it does not breed in your project area.

Survey Effort ( )
Vertical black lines superimposed on probability of presence bars indicate the number of surveys performed for that species in the 10km grid cell(s) your project area overlaps. The number of surveys is expressed as a range, for example, 33 to 64 surveys.

To see a bar's survey effort range, simply hover your mouse cursor over the bar.

No Data ( )
A week is marked as having no data if there were no survey events for that week.

Survey Timeframe
Surveys from only the last 10 years are used in order to ensure delivery of currently relevant information. The exception to this is areas off the Atlantic coast, where bird returns are based on all years of available data, since data in these areas is currently much more sparse.

SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Allen's Hummingbird
BCC Rangewide (CON)
Bald Eagle
Non-BCC Vulnerable
Belding's Savannah
Sparrow

BCC - BCR
Black Oystercatcher
BCC Rangewide (CON)
Black Skimmer
BCC Rangewide (CON)
Black Swift
BCC Rangewide (CON)
Black Tern
BCC Rangewide (CON)
Black Turnstone
BCC Rangewide (CON)
Bullock's Oriole

BCC - BCR
California Gull
BCC Rangewide (CON)
California Thrasher
BCC Rangewide (CON)
Clark's Grebe
BCC Rangewide (CON)
SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC444 Item 9 A.

Common
Yellowthroat

BCC - BCR
Elegant Tern

BCC - BCR
Golden Eagle
Non-BCC Vulnerable
Heermann's Gull
BCC Rangewide (CON)
Lawrence's Goldfinch
BCC Rangewide (CON)
Marbled Godwit
BCC Rangewide (CON)
Northern Harrier

BCC - BCR
Nuttall's Woodpecker

BCC - BCR
Oak Titmouse
BCC Rangewide (CON)
Olive-sided Flycatcher
BCC Rangewide (CON)
Red Knot
BCC Rangewide (CON)
Santa Barbara Song
Sparrow

BCC - BCR

SPECIES JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC Short-billed
Dowitcher
BCC Rangewide (CON)
Tricolored Blackbird
BCC Rangewide (CON)
Western Grebe
BCC Rangewide (CON)
Western Gull
BCC Rangewide (CON)
Western Screech-owl

BCC - BCR
Willet
BCC Rangewide (CON)
Wrentit
BCC Rangewide (CON)
Tell me more about conservation measures I can implement to avoid or minimize impacts to migratory birds.

Nationwide Conservation Measures describes measures that can help avoid and minimize impacts to all birds at any location year round. Implementation of these measures is particularly important when birds are most likely to occur in the project area. When birds may be breeding in the area, identifying the locations of any active nests and avoiding their destruction is a very helpful impact minimization measure. To see when birds are most likely to occur and be breeding in your project area, view the Probability of Presence Summary. Additional measures or permits may be advisable depending on the type of activity you are conducting and the type of infrastructure or bird species present on your project site. 445
Item 9 A.

What does IPaC use to generate the list of migratory birds that potentially occur in my specified location? The Migratory Bird Resource List is comprised of USFWS Birds of Conservation Concern (BCC) and other species that may warrant special attention in your project location.

The migratory bird list generated for your project is derived from data provided by the Avian Knowledge Network (AKN). The AKN data is based on a growing collection of survey, banding, and citizen science datasets and is queried and filtered to return a list of those birds reported as occurring in the 10km grid cell(s) which your project intersects, and that have been identified as warranting special attention because they are a BCC species in that area, an eagle (Eagle Act requirements may apply), or a species that has a particular vulnerability to offshore activities or development.

Again, the Migratory Bird Resource list includes only a subset of birds that may occur in your project area. It is not representative of all birds that may occur in your project area. To get a list of all birds potentially present in your project area, please visit the Rapid Avian Information Locator (RAIL) Tool.

What does IPaC use to generate the probability of presence graphs for the migratory birds potentially occurring in my specified location?
The probability of presence graphs associated with your migratory bird list are based on data provided by the Avian Knowledge Network (AKN). This data is derived from a growing collection of survey, banding, and citizen science datasets.

Probability of presence data is continuously being updated as new and better information becomes available. To learn more about how the probability of presence graphs are produced and how to interpret them, go the Probability of Presence Summary and then click on the "Tell me about these graphs" link.

How do I know if a bird is breeding, wintering or migrating in my area? To see what part of a particular bird's range your project area falls within (i.e. breeding, wintering, migrating or year-round), you may query your location using the RAIL Tool and look at the range maps provided for birds in your area at the bottom of the profiles provided for each bird in your results. If a bird on your migratory bird species list has a breeding season associated with it, if that bird does occur in your project area, there may be nests present at some point within the timeframe specified. If "Breeds elsewhere" is indicated, then the bird likely does not breed in your project area.

What are the levels of concern for migratory birds?
Migratory birds delivered through IPaC fall into the following distinct categories of concern:

1. "BCC Rangewide" birds are Birds of Conservation Concern (BCC) that are of concern throughout their range anywhere within the USA (including Hawaii, the Pacific Islands, Puerto Rico, and the Virgin Islands);

2. "BCC - BCR" birds are BCCs that are of concern only in particular Bird Conservation Regions (BCRs) in the continental USA; and

3. "Non-BCC - Vulnerable" birds are not BCC species in your project area, but appear on your list either because of the Eagle Act requirements (for eagles) or (for non-eagles) potential susceptibilities in offshore areas from certain types of development or activities (e.g. offshore energy development or longline fishing).

Although it is important to try to avoid and minimize impacts to all birds, efforts should be made, in particular, to avoid and minimize impacts to the birds on this list, especially eagles and BCC species of rangewide concern. For more information on conservation measures you can implement to help avoid and minimize migratory bird impacts and requirements for eagles, please see the FAQs for these topics.

Details about birds that are potentially affected by offshore projects For additional details about the relative occurrence and abundance of both individual bird species and groups of bird species within your project area off the Atlantic Coast, please visit the Northeast Ocean Data Portal. The Portal also offers data and information about other taxa besides birds that may be helpful to you in your project review. Alternately, you may download the bird model results files underlying the portal maps through the NOAA NCCOS Integrative Statistical Modeling and Predictive Mapping of Marine Bird Distributions and Abundance on the Atlantic Outer Continental Shelf project webpage.

Bird tracking data can also provide additional details about occurrence and habitat use throughout the year, including migration.

Models relying on survey data may not include this information. For additional information on marine bird tracking data, see the Diving Bird Study and the nanotag studies or contact Caleb Spiegel or Pam Loring. 446 Item 9 A.

What if I have eagles on my list?
If your project has the potential to disturb or kill eagles, you may need to obtain a permit to avoid violating the Eagle Act should such impacts occur.

Proper Interpretation and Use of Your Migratory Bird Report The migratory bird list generated is not a list of all birds in your project area, only a subset of birds of priority concern. To learn more about how your list is generated, and see options for identifying what other birds may be in your project area, please see the FAQ "What does IPaC use to generate the migratory birds potentially occurring in my specified location". Please be aware this report provides the "probability of presence" of birds within the 10 km grid cell(s) that overlap your project; not your exact project footprint.

On the graphs provided, please also look carefully at the survey effort (indicated by the black vertical bar) and for the existence of the "no data" indicator (a red horizontal bar). A high survey effort is the key component. If the survey effort is high, then the probability of presence score can be viewed as more dependable. In contrast, a low survey effort bar or no data bar means a lack of data and, therefore, a lack of certainty about presence of the species. This list is not perfect; it is simply a starting point for identifying what birds of concern have the potential to be in your project area, when they might be there, and if they might be breeding (which means nests might be present). The list helps you know what to look for to confirm presence, and helps guide you in knowing when to implement conservation measures to avoid or minimize potential impacts from your project activities, should presence be confirmed. To learn more about conservation measures, visit the FAQ "Tell me about conservation measures I can implement to avoid or minimize impacts to migratory birds" at the bottom of your migratory bird trust resources page.

Facilities
National Wildlife Refuge lands
Any activity proposed on lands managed by the National Wildlife Refuge system must undergo a 'Compatibility Determination' conducted by the Refuge. Please contact the individual Refuges to discuss any questions or concerns.

There are no refuge lands at this location.

Fish hatcheries
There are no fish hatcheries at this location.

Wetlands in the National Wetlands Inventory (NWI)
Impacts to NWI wetlands and other aquatic habitats may be subject to regulation under Section 404 of the Clean Water Act, or other State/Federal statutes.

For more information please contact the Regulatory Program of the local U.S. Army Corps of Engineers District.

Please note that the NWI data being shown may be out of date. We are currently working to update our NWI data set. We recommend you verify these results with a site visit to determine the actual extent of wetlands on site.

This location overlaps the following wetlands:

RIVERINE
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NOTE: This initial screening does not replace an on-site delineation to determine whether wetlands occur.

Additional information on the NWI data is provided below.

Data limitations
The Service's objective of mapping wetlands and deepwater habitats is to produce reconnaissance level information on the location, type and size of these resources. The maps are prepared from the analysis of high altitude imagery. Wetlands are identified based on vegetation, visible hydrology and geography. A margin of error is inherent in the use of imagery; thus, detailed on-the-ground inspection of any particular site may result in revision of the wetland boundaries or classification established through image analysis.

The accuracy of image interpretation depends on the quality of the imagery, the experience of the image analysts, the amount and quality of the collateral data and the amount of ground truth verification work conducted. Metadata should be consulted to determine the date of the source imagery used and any mapping problems.

Wetlands or other mapped features may have changed since the date of the imagery or field work. There may be occasional differences in polygon boundaries or classifications between the information depicted on the map and the actual conditions on site.

Data exclusions
Certain wetland habitats are excluded from the National mapping program because of the limitations of aerial imagery as the primary data source used to detect wetlands. These habitats include seagrasses or submerged aquatic vegetation that are found in the intertidal and subtidal zones of estuaries and nearshore coastal waters. Some deepwater reef communities (coral or tuberficid worm reefs) have also been excluded from the inventory. These habitats, because of their depth, go undetected by aerial imagery.

Data precautions
Federal, state, and local regulatory agencies with jurisdiction over wetlands may define and describe wetlands in a different manner than that used in this inventory. There is no attempt, in either the design or products of this inventory, to define the limits of proprietary jurisdiction of any Federal, state, or local government or to establish the geographical scope of the regulatory programs of government agencies. Persons intending to engage in activities involving modifications within or adjacent to wetland areas should seek the advice of appropriate Federal, state, or local agencies concerning specified agency regulatory programs and proprietary jurisdictions that may affect such activities.

R1UBV
A full description for each wetland code can be found at the National Wetlands Inventory website 448
Item 9 A.

Attachment C: Special-Status Species Table
449
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Special-Status Species Table
Soquel, Felton, Laurel, Loma Prieta, Santa Cruz, and Watsonville West Quadrangles Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area

MAMMALS
Antrozous pallidus
Pallid bat
-- / CSC / -- Occurs in a wide variety of habitats including grasslands, shrublands, arid desert areas, oak
savanna, coastal forested areas, and coniferous
forests of the mountain regions of California. Most
common in open, dry habitats with rocky areas for
roosting. Day roosts include caves, crevices, mines,
and occasionally hollow trees and buildings. Seems
to prefer rocky outcrops, cliffs, and crevices with
access to open habitats for foraging. Similar
structures are used for night roosting and will also
use more open sites such as eaves, awnings, and
open areas under bridges for feeding roosts.

Low
Suitable roosting habitat may be present under the
bridge; however, limited foraging habitat is present
surrounding the survey area.

Corynorhinus townsendii
Townsend’s big-eared bat
-- / CSC / -- Found primarily in rural settings from inland deserts to coastal redwoods, oak woodland of the inner
Coast Ranges and Sierra foothills, and low to midelevation mixed coniferous-deciduous forests.

Typically roost during the day in limestone caves,
lava tubes, and mines, but can roost in buildings
that offer suitable conditions. Night roosts are in
more open settings and include bridges, rock
crevices, and trees.

Low
Suitable roosting habitat may be present under the
bridge; however, limited foraging habitat is present
surrounding the survey area.

Neotoma fuscipes annectens
San Francisco dusky-footed
woodrat
-- / CSC / -- Forest habitats of moderate canopy with moderate to dense understory. Also occurs in chaparral
habitats.

Unlikely
No suitable habitat is present within the survey area.

Taxidea taxus
American badger
-- / CSC / -- Dry, open grasslands, fields, pastures savannas, and mountain meadows near timberline are preferred.

The principal requirements seem to be sufficient
food, friable soils, and relatively open, uncultivated
grounds.

Unlikely
No suitable habitat is present within the survey area.

BIRDS
Agelaius tricolor
Tricolored blackbird
(nesting colony)
-- / SC&CSC / -- Nest in colonies in dense riparian vegetation, along rivers, lagoons, lakes, and ponds. Forages over
grassland or aquatic habitats.

Unlikely
Suitable habitat is not present in riparian habitat
adjacent to the survey area.
450
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Athene cunicularia
Burrowing owl (burrow sites &
some wintering sites)
-- / CSC / -- Year-round resident of open, dry grassland and desert habitats, and in grass, forb and open shrub
stages of pinyon-juniper and ponderosa pine
habitats. Frequents open grasslands and shrublands
with perches and burrows. Use rodent burrows
(often California ground squirrel) for roosting and
nesting cover. Pipes, culverts, and nest boxes may
be substituted for burrows in areas where burrows
are not available.

Unlikely
No suitable habitat is present within the survey area.

Aquila chrysaetos
Golden eagle (nesting & wintering)
--/ CFP / -- Use rolling foot-hills, mountain terrain, wide arid plateaus deeply cut by streams and canyons, open
mountain slopes, cliffs, and rocky outcrops. Nest in
secluded cliffs with overhanging ledges as well as
large trees.

Unlikely
No suitable nesting or wintering habitat is present
within the survey area.

Brachyramphus marmoratus
Marbled Murrelet
FT / SE / -- Occur year-round in marine subtidal and pelagic habitats from the Oregon border to Point Sal. Partial
to coastlines with stands of mature redwood and
Douglas-fir. Requires dense mature forests of
redwood and/or Douglas-fir for breeding and
nesting.

Unlikely
No suitable habitat within the survey area.

Coccyzus americanus occidentalis
Western yellow-billed cuckoo
FT / SE / -- Inhabits extensive deciduous riparian thickets or forests with dense, low-level or understory foliage,
slow-moving watercourses, backwaters, or seeps.

Willow almost always a dominant component of the
vegetation.

Unlikely
Marginal habitat is present in the riparian habitat
adjacent to the survey area; however, the riparian
area does not provide the dense canopy this species
requires. There are no CNDDB occurrences of this
species within the quadrangles reviewed.

Coturnicops noveboracensis
Yellow rail
-- / CSC / -- Wet meadows and coastal tidal marshes. Occurs year round in California, but in two primary
seasonal roles: as a very local breeder in the
northeastern interior and as a winter visitor (early
Oct to mid-Apr) on the coast and in the Suisun
Marsh region.

Unlikely
No suitable habitat is present within the survey area.

Charadrius alexandrinus nivosus
Western snowy plover (nesting)
FT / CSC / -- Sandy beaches on marine and estuarine shores, also salt pond levees and the shores of large alkali lakes.

Requires sandy, gravelly or friable soil substrate for
nesting.

Unlikely
No suitable habitat is present within the survey area.

Cypseloides niger
Black swift
(nesting)
-- / CSC / -- Regularly nests in moist crevice or cave on sea cliffs above the surf, or on cliffs behind, or adjacent to, waterfalls in deep canyons. Forages widely over
many habitats.

Unlikely
No suitable habitat is present within the survey area.
451
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Elanus leucurus
White-tailed kite (nesting)
-- / CFP / -- Open groves, river valleys, marshes, and grasslands.

Prefer such areas with low roosts (fences etc.). Nest
in shrubs and trees adjacent to grasslands.

Low
Trees within the survey area may provide suitable
nesting habitat; however, limited foraging habitat is
available surrounding the survey area.

Gymnogyps californianus
California condor
FE / SE / -- Roosting sites in isolated rocky cliffs, rugged chaparral, and pine covered mountains 2000-6000
feet above sea level. Foraging area removed from
nesting/roosting site (includes rangeland and coastal
area - up to 19-mile commute one way). Nest sites
in cliffs, crevices, potholes.

Unlikely
No suitable nesting habitat is present within the
survey area. There are no CNDDB occurrences of
this species within the quadrangles reviewed.

Laterallus jamaicensis coturniculus
California black rail
-- / ST&CFP / -- Inhabits freshwater marshes, wet meadows & shallow margins of saltwater marshes bordering
larger bays. Needs water depths of about 1 inch that
does not fluctuate during the year & dense
vegetation for nesting habitat.

Unlikely
No suitable habitat is present within the survey area.

Phoebastria albatrus
Short-tailed albatross
FE / -- / -- During the non-breeding season, short-tailed albatross range along the Pacific Rim, from
southern Japan to the west coast of Canada and the
United States, primarily along continental shelf
margin. The species breeds primarily on remote
islands in the western Pacific.

Unlikely
No suitable habitat is present within the survey area.

Riparia riparia
Bank swallow (nesting)
-- / ST / -- Nest colonially in sand banks. Found near water; fields, marshes, streams, and lakes.

Unlikely
No suitable habitat is present within the survey area
as the banks of Soquel Creek are channelized.

Sternula antillarum browni
California least tern
FE / SE / -- Prefers undisturbed nest sites on open,
sandy/gravelly shores near shallow-water feeding
areas in estuaries. Sea beaches, bays, large rivers,
bars.

Unlikely
No suitable habitat is present within the survey area.

No CNDDB occurrences are reported within the
quadrangles evaluated.

Vireo bellii pusillus
Least Bell’s vireo
FE / SE / -- Riparian areas and drainages. Breed in willow riparian forest supporting a dense, shrubby
understory. Oak woodland with a willow riparian
understory is also used in some areas, and
individuals sometimes enter adjacent chaparral,
coastal sage scrub, or desert scrub habitats to
forage.

Unlikely
Marginal habitat is present in the riparian habitat
adjacent to the survey area; however, the riparian
area does not provide the dense canopy this species
requires.
452
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area

REPTILES AND AMPHIBIANS
Ambystoma californiense
California tiger salamander
FT / ST / -- Annual grassland and grassy understory of valleyfoothill hardwood habitats in central and northern California. Need underground refuges and vernal
pools or other seasonal water sources.

Unlikely
No suitable breeding or upland habitat is present
within the survey area. There are no CNDDB
occurrences within the dispersal range (1.3 miles, 2.2
km) of this species. The nearest CNDDB occurrence
is located approximately seven miles from the survey
area in Ellicott Pond, a known CTS breeding
resource.

Ambystoma macrodactylum
croceum
Santa Cruz long-toed salamander
FE / SE&CFP / -- Preferred habitats include ponderosa pine, montane hardwood-conifer, mixed conifer, montane riparian,
red fir and wet meadows. Occurs in a small number
of localities in Santa Cruz and Monterey Counties.

Adults spend the majority of the time in
underground burrows and beneath objects. Larvae
prefer shallow water with clumps of vegetation.

Unlikely
No suitable breeding or upland habitat is present
within the survey area. There are no CNDDB
occurrences or potential breeding resources within
the dispersal range (1.0-mile, 1.6 km) of this species.

The nearest CNDDB occurrence is located
approximately 4.0 miles from the survey area in
Valencia Lagoon, a known SCLTS breeding
resource.

Aneides niger
Santa Cruz black salamander
-- / CSC / -- Occurs in the fog belt of the outer Coastal Range in mesic forests. This species occurs in moist
streamside microhabitats. This species is often
found in shallow standing water or seeps. Small
geographical range consisting of woodland habitat
within the Santa Cruz Mountains in western Santa
Clara, northern Santa Cruz, and southernmost San
Mateo Counties.

Unlikely
No suitable habitat is present within the survey area.

Anniella pulchra
Northern California legless lizard
-- / CSC / -- Requires moist, warm habitats with loose soil for burrowing and prostrate plant cover, often forages
in leaf litter at plant bases; may be found on
beaches, sandy washes, and in woodland, chaparral,
and riparian areas.

Unlikely
No suitable habitat is present within the survey area.

Dicamptodon ensatus
California giant salamander
-- / CSC / -- Occurs within the Coast Range from just north of the southern border of Mendocino County to
southern Santa Cruz County. Found in wet coastal
forests in or around clear, cold permanent and semipermanent streams and seepages. Typically, within elevations ranging from sea level to approximately
3000 feet.

Unlikely
No suitable habitat is present within the survey area.

Emys marmorata
Western pond turtle
FC / CSC / -- Associated with permanent or nearly permanent water in a wide variety of habitats including
streams, lakes, ponds, irrigation ditches, etc.

Require basking sites such as partially submerged
logs, rocks, mats of vegetation, or open banks.

Moderate
Suitable habitat is present within the survey area in
Soquel Creek. The nearest CNDDB occurrence is
located approximately one mile upstream from the
survey area in Soquel Creek.
453
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Rana boylii
Foothill yellow-legged frog
-- / SC&CSC / -- Partly shaded, shallow streams and riffles with a rocky substrate in a variety of habitats, including
hardwood, pine, and riparian forests, scrub,
chaparral, and wet meadows. Rarely encountered
far from permanent water.

Low
This species is known to occur in upstream areas of
Soquel Creek, however suitable habitat is not present
within the survey area within Soquel Creek. The
creek within the survey area is confined to the
engineered channel that does not provide the
constituent elements necessary for this species to
breed or forage. The nearest CNDDB occurrence
(#102) is located approximately one mile upstream in
Soquel Creek where all life stages of the species have
been found as recently as 2021.

Rana draytonii
California red-legged frog
FT / CSC / -- Lowlands and foothills in or near permanent or lateseason sources of deep water with dense, shrubby, or emergent riparian vegetation. During late
summer or fall adults are known to utilize a variety
of upland habitats with leaf litter or mammal
burrows.

Unlikely
No suitable breeding habitat is present within the
survey area. The creek within the survey area is
confined to the engineered channel that does not
provide the constituent elements necessary for this
species to breed or forage. There are no CNDDB
occurrences located within the known dispersal
distance of this species (1.0-mile, 1.6 km). The
nearest CNDDB occurrence is located approximately

4.0 miles from the survey area in Valencia Lagoon.

Thamnophis sirtalis tetrataenia
San Francisco garter snake
FE / SE&CFP / -- An extremely scarce subspecies which only occurs in the vicinity of ponds and reservoirs in San Mateo
County. Observed most often in the vicinity of
standing water (mainly ponds, lakes, marshes, and
sloughs); however, temporary ponds and other
seasonal water bodies are also used. Emergent and
bankside vegetation (such as cattails, bulrush, and
spike rushes) are preferred for cover. Use open
spaces between stream/pond habitats and grasslands
for basking.

Unlikely
Marginal habitat is present within the survey area;
however, there are no CNDDB occurrences of this
species within the quadrangles reviewed.

FISH
Eucyclogobius newberryi
Tidewater goby
FE / CSC / -- Brackish water habitats, found in shallow lagoons and lower stream reaches. Tidewater gobies appear
to be naturally absent (now and historically) from
three large stretches of coastline where lagoons or
estuaries are absent and steep topography or swift
currents may prevent tidewater gobies from
dispersing between adjacent localities. The
southernmost large, natural gap occurs between the
Salinas River in Monterey County and Arroyo del
Oso in San Luis Obispo County.

High
This species is known to occur within Soquel Creek.
454
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Lavinia exilicauda harengus
Monterey hitch
(Pajaro/Salinas hitch)
-- / CSC / -- Found only within the Pajaro and Salinas River systems. Can occupy a wide variety of habitats,
however, they are most abundant in lowland areas
with large pools or small reservoirs that mimic such
conditions. May be found in brackish water
conditions within the Salinas River lagoon during
the early summer months when the sandbar forms at
the mouth of the river.

Not Present
This species is only known to occur within the Pajaro
and Salinas Rivers.

Oncorhynchus kisutch
Coho salmon
(central California coast ESU)
FE / SE / -- All naturally spawned populations from Punta Gorda south to and including the San Lorenzo
River; populations in tributaries to San Francisco
Bay, excluding the Sacramento–San Joaquin River
system; and four artificial propagation programs.

Unlikely
This species is known to occur within the San
Lorenzo River and its tributaries in Santa Cruz
County but is not known to occur in other water
bodies.

Oncorhynchus mykiss irideus
Steelhead
(central California coast DPS)
FT / -- / -- Coastal perennial and near perennial streams, with suitable spawning and rearing habitat and no major
barriers.

High
This species is known to occur within Soquel Creek.

Oncorhynchus mykiss irideus
Steelhead
(south-central California coast
DPS)
FT / -- / -- Cold headwaters, creeks, and small to large rivers and lakes; anadromous in coastal streams.

Unlikely
This species is known to occur within the Pajaro
River and its tributaries in Santa Cruz County but is
not known to occur in other water bodies.

Thaleichthys pacificus
Eulachon
FT / -- / -- Occur in nearshore ocean waters and to 1,000 feet in depth, except for the brief spawning runs into
their natal streams. Spawning grounds are typically
in the lower reaches of larger snowmelt-fed rivers
with water temperatures ranging from 39 to 50°F.

Spawning occurs over sand or coarse gravel
substrates.

Low
Soquel Creek provides a suitable habitat for this
species. There is one CNDDB occurrence (#10) of
this species within the quadrangles reviewed which
encompasses the entirety of the survey area,
consisting of a historic occurrence of the species in
Soquel Lagoon estimated around 1911; however, this
species has not been documented in the vicinity
since.

INVERTEBRATES
Bombus crotchii
Crotch bumble bee
-- / SC / -- Occurs in open grassland and scrubs at relatively warm and dry sites. Requires plants that bloom and
provide adequate nectar and pollen throughout the
colony’s life cycle, which is from early February to
late October. Generally, nests underground, often in
abandoned mammal burrows. Within California this
species is known to occur in the Mediterranean,
Pacific Coast, Western Desert, as well as Great
Valley and adjacent foothill regions.

Unlikely
No suitable habitat is present within the survey area.
455
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Bombus occidentalis
Western bumble bee
-- / SC / -- Occurs in open grassy areas, urban parks, urban gardens, chaparral, and meadows. This species
generally nest underground. Western bumble bee
populations are currently largely restricted to high
elevation sites in the Sierra Nevada.

Unlikely
No suitable habitat is present within the survey area.

Cicindela ohlone
Ohlone tiger beetle
FE / -- / -- Coastal terraces with remnant stands of open native grassland with clay or sandy soils. Hunt, breed, and
dig small vertical burrows along sunny single-track
trails and dirt roads (maintained by cattle, hikers,
etc.) in coast terrace meadows that still support
native grasses. Current range from the City of
Scotts Valley to the eastern edge of the City of
Santa Cruz.

Unlikely
No suitable habitat is present within the survey area
and the survey area is outside of the known range of
this species.

Danaus plexippus
Monarch butterfly
FC / -- / -- Overwinters in coastal California using colonial roosts generally found in Eucalyptus, pine and
acacia trees. Overwintering habitat for this species
within the Coastal Zone represents ESHA. Local
ordinances often protect this species as well.

Unlikely
No suitable habitat is present within the survey area
and no overwintering populations have been
documented within the survey area.

Euphilotes enoptes smithi
Smith’s blue butterfly
FE / -- / -- Most commonly associated with coastal dunes and coastal sage scrub plant communities in Monterey
and Santa Cruz Counties. Plant hosts are
Eriogonum latifolium and E. parvifolium.

Not Present
No suitable habitat is present within the survey area.

The host plant species were not identified during the
survey.

Polyphylla barbata
Mount Hermon (=barbate) June
beetle
FE / -- / -- Ponderosa pine-chaparral habitat with sandy soil and open, sparsely vegetated areas. May also occur
in more vegetated areas of chaparral. While not
always present, silver-leaved manzanita is often an
indicator of suitable habitat. Restricted to the
Zayante sandhills habitat of the Ben LomondMount Harmon-Scotts Valley area.

Unlikely
No suitable habitat is present within the survey area
and the survey area is outside of the known range of
this species.

Trimerotropis infantillis
Zayante band-winged grasshopper
FE / -- / -- Open sandy areas with sparse, low annual and perennial herbs on high ridges with sparse
ponderosa pine. Often occurs with Ben Lomond
wallflower. Restricted to sand parkland habitat
found on ridges and hills within the Zayante
sandhills habitat in Santa Cruz County. Flight
season extends from late May through August.

Unlikely
No suitable habitat is present within the survey area
and the survey area is outside of the known range of
this species.

PLANTS
Agrostis blasdalei
Blasdale’s bent grass
-- / -- / 1B Coastal bluff scrub, coastal dunes, and coastal prairie at elevations from 0-150 meters. Perennial
rhizomatous herb in the Poaceae family; blooms
May–July.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.
456
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Amsinckia lunaris
Bent-flowered fiddleneck
-- / -- / 1B Coastal bluff scrub, cismontane woodland, and valley and foothill grassland at elevations of 3-500
meters. Annual herb in the Boraginaceae family;
blooms March-June.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Aphyllon robbinsii
Robbin’s broomrape
-- / -- / 1B Sandy or loose soils of coastal bluffs at elevations of less than 100 meters. Annual herb in the
Orobanchaceae family; blooms April-June.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Arctostaphylos andersonii
Anderson’s manzanita
-- / -- / 1B Openings and edges of broadleaved upland forest, chaparral, and north coast coniferous forest at
elevations of 60-760 meters. Evergreen shrub in the
Ericaceae family; blooms November-May.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Arctostaphylos hookeri ssp. hookeri
Hooker’s manzanita
-- / -- / 1B Closed-cone coniferous forest, chaparral,
cismontane woodland, and coastal scrub on sandy
soils at elevations of 85-536 meters. Evergreen
shrub in the Ericaceae family; blooms January-June.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Arctostaphylos pajaroensis
Pajaro manzanita
-- / -- / 1B Chaparral on sandy soils at elevations of 30-760 meters. Evergreen shrub in the Ericaceae family;
blooms December-March.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Arctostaphylos silvicola
Bonny Doon manzanita
-- / -- / 1B Chaparral, closed-cone coniferous forest, and lower montane coniferous forest on inland marine sands at
elevations of 120-600 meters. Evergreen shrub in
the Ericaceae family; blooms February-March.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Arenaria paludicola
Marsh sandwort
FE / SE / 1B Known from only two natural occurrences in Black Lake Canyon and at Oso Flaco Lake. Sandy
openings of freshwater of brackish marshes and
swamps at elevations of 3-170 meters. Stoloniferous
perennial herb in the Caryophyllaceae family;
blooms May-August.

Not Present
No suitable habitat is present within the survey area.

The project site is outside of the accepted range of
this species.

Astragalus agnicidus
Humbolt milk vetch
-- / SE / 1B Broadleaved upland forest and North Coast
coniferous forest in disturbed/open areas and
roadsides at elevations of 120-800 meters. Perennial
herb in the Fabaceae family; blooms AprilSeptember.

Not Present
No suitable habitat is present within the survey area.

The project site is outside of the accepted range of
this species.

Calyptridium parryi var. hesseae
Santa Cruz Mountains pussypaws
-- / -- / 1B Sandy or gravelly openings of chaparral and cismontane woodlands at elevations of 305-1530
meters. Annual herb in the Montiaceae family;
blooms May-August.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.
457
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Carex comosa
Bristly sedge
-- / -- / 2B Coastal prairie, marshes and swamps on lake margins, and valley and foothill grassland at
elevations of 0-625 meters. Perennial rhizomatous
herb in the Cyperaceae family; blooms MaySeptember.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Carex saliniformis
Deceiving sedge
-- / -- / 1B Mesic areas of coastal prairie, coastal scrub, meadows and seeps, and coastal salt marshes and
swamps at elevations of 3-230 meters. Perennial
rhizomatous herb in the Cyperaceae family; blooms
June-July.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Ceanothus ferrisiae
Coyote ceanothus
FE / -- / 1B Chaparral, coastal scrub, and valley and foothill grassland on serpentinite soils, at elevations of 120-
460 meters. Perennial evergreen shrub in the
Rhamnaceae family; blooms January-May.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Centromadia parryi ssp. congdonii
Congdon’s tarplant
-- / -- / 1B Valley and foothill grassland on heavy clay, saline, or alkaline soils at elevations of 0-230 meters.

Annual herb in the Asteraceae family; blooms MayNovember.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Chorizanthe pungens var. pungens
Monterey spineflower
FT / -- / 1B Maritime chaparral, cismontane woodland, coastal dunes, coastal scrub, and valley and foothill
grassland on sandy soils at elevations of 3-450
meters. Annual herb in the Polygonaceae family;
blooms April-July.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Chorizanthe robusta var. hartwegii
Scott’s Valley spineflower
FE / -- / 1B Meadows and seeps on sandy soils and valley and foothill grassland on mudstone and Purisima
outcrops at elevations of 230-245 meters. Annual
herb in the Polygonaceae family; blooms AprilJuly.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Chorizanthe robusta var. robusta
Robust spineflower
FE / -- / 1B Openings in cismontane woodland, coastal dunes, maritime chaparral, and coastal scrub on sandy or
gravelly soils at elevations of 3-300 meters. Annual
herb in the Polygonaceae family; blooms AprilSeptember.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Collinsia multicolor
San Francisco collinsia
-- / -- / 1B Closed-cone coniferous forest and coastal scrub, sometimes on serpentinite soils, at elevations of 30-
250 meters. Annual herb in the Plantaginaceae
family; blooms March-May.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Dacryophyllum falcifolium
Tear drop moss
-- / -- / 1B North coast coniferous forests on carbonate soils at elevations of 50-275 meters. Moss. Known only in
Monterey and Santa Cruz counties.

Unlikely
No suitable habitat is present within the survey area
and the survey area is outside the elevational range of this species.
458
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Eastwoodiella californica
Swamp harebell
-- / -- / 1B Bogs and fens, closed cone coniferous forest, coastal prairie, meadows and seeps, and freshwater
marshes and swamps at elevations of 1-405 meters.

Perennial rhizomatous herb in the Campanulaceae
family; blooms June-October.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Eriogonum nudum var. decurrens
Ben Lomond buckwheat
-- / -- / 1B Chaparral, cismontane woodland, and lower
montane coniferous forest (maritime ponderosa pine
sandhills) on sandy soils, at elevations of 50-800
meters. Perennial herb in the Polygonaceae family;
blooms June-October.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Erysimum ammophilum
Sand-loving wallflower
-- / -- / 1B Openings in maritime chaparral, coastal dunes, and coastal scrub on sandy soils at elevations of 0-60
meters. Perennial herb in the Brassicaceae family;
blooms February-June.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Erysimum teretifolium
Santa Cruz wallflower
FE / SE / 1B Chaparral and lower montane coniferous forest on inland marine sands, at elevations of 120-610
meters. Perennial herb in the Brassicaceae family;
blooms March-July.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Fissidens pauperculus
Minute pocket moss
-- / -- / 1B North coast coniferous forest on damp coastal soil at elevations of 10-1024 meters. Moss in the
Fissidentaceae family.

Unlikely
No suitable habitat is present within the survey area.

Gilia tenuiflora ssp. arenaria
Monterey gilia
FE / ST / 1B Openings in maritime chaparral, cismontane woodland, coastal dunes, and coastal scrub on
sandy soils at elevations of 0-45 meters. Annual
herb in the Polemoniaceae family; blooms AprilJune.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Hesperocyparis abramsiana var.
abramsiana
Santa Cruz cypress
FT / SE / 1B Closed-cone coniferous forest, chaparral, and lower montane coniferous forest on sandstone or granitic
soils at elevations of 280-800 meters. Evergreen
tree in the Cupressaceae family.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Hoita strobilina
Loma Prieta hoita
-- / -- / 1B Mesic areas of chaparral, cismontane woodland, and riparian woodland, usually on serpentinite soils,
at elevations of 30-860 meters. Perennial herb in the
Fabaceae family; blooms May-October.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Holocarpha macradenia
Santa Cruz tarplant
FT / SE / 1B Coastal prairies and valley foothill grasslands, often clay or sandy soils, at elevations of 10-220 meters.

Annual herb in the Asteraceae family; blooms JuneOctober.

Unlikely
No suitable habitat is present within the survey area.

Horkelia cuneata var. sericea
Kellogg’s horkelia
-- / -- / 1B Openings of closed-cone coniferous forests, maritime chaparral, coastal dunes, and coastal scrub
on sandy or gravelly soils at elevations of 10-200
meters. Perennial herb in the Rosaceae family;
blooms April-September.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.
459
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Horkelia marinensis
Point Reyes horkelia
-- / -- / 1B Coastal dunes, coastal prairie, and coastal scrub on sandy soils at elevations of 5-350 meters. Perennial
herb in the Rosaceae family; blooms MaySeptember.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Lasthenia californica ssp.
macrantha
Perennial goldfields
-- / -- / 1B Coastal bluff scrub, coastal dunes, and coastal scrub at an elevation of 5-520 meters. Perennial herb in
the Asteraceae family. Blooms January-November.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Lessingia micradenia var. glabrata
Smooth lessingia
-- / -- / 1B Chaparral and cismontane woodlands on
serpentinite soils, often on roadsides, at elevations
of 120-420 meters. Annual herb in the Asteraceae
family; blooms July-November.

Unlikely
No suitable habitat is present within the survey area.

Lupinus constancei
Lassics lupine
FE / SE / 1B Lower montane coniferous forest, associated with serpentine soils at elevations of 1500-2000 meters.

This species is restricted to Humboldt and Trinity
Counties within the Six Rivers National Forest.

Perennial herb in the Fabaceae family; blooms July.

Not Present
No suitable habitat is present within the survey area
and the survey area is outside the elevational range
for this species.

Malacothamnus arcuatus
Arcuate bush-mallow
-- / -- / 1B Chaparral and cismontane woodland at elevations of 15-355 meters. Perennial evergreen shrub in the
Malvaceae family; blooms April-September.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Malacothamnus hallii
Hall’s bush mallow
-- / -- / 1B Chaparral and coastal scrub at elevations of 10-760 meters. Perennial evergreen shrub in the Malvaceae
family; blooms May-October.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Microseris paludosa
Marsh microseris
-- / -- / 1B Closed-cone coniferous forest, cismontane
woodland, coastal scrub, and valley and foothill
grassland at elevations of 5-300 meters. Perennial
herb in the Asteraceae family; blooms April-July.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Monardella sinuata ssp. nigrescens
Northern curly-leaved monardella
-- / -- / 1B Chaparral, coastal dunes, coastal scrub, and lower montane coniferous forest (ponderosa pine
sandhills) on sandy soils at elevations of 0-300
meters. Annual herb in the Lamiaceae family;
blooms April-September.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Monolopia gracilens
Woodland wollythreads
-- / -- / 1B Openings of broadleaved upland forest, chaparral, cismontane woodland, North Coast coniferous
forest, and valley and foothill grassland on
serpentinite soils at elevations of 100-1200 meters.

Annual herb in the Asteraceae family; blooms
February-July.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.
460
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Pedicularis dudleyi
Dudley’s lousewort
-- / SR / 1B Maritime chaparral, cismontane woodland, North Coast coniferous forest, and valley and foothill
grassland at elevations of 60-900 meters. Perennial
herb in the Orbanchaceae family; blooms AprilJune.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Penstemon rattanii var. kleei
Santa Cruz Mountains beardtongue
-- / -- / 1B Chaparral and lower montane and North Coast coniferous forests at elevations of 400-1100 meters.

Perennial herb in the Plantaginaceae family; blooms
May-June.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Pentachaeta bellidiflora
White-rayed pentachaeta
FE / SE / 1B Cismontane woodland and valley and foothill grasslands, often on serpentinite soils, at elevations
of 35-620 meters. Annual herb in the Asteraceae
family; blooms March-May.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Piperia candida
White-flowered rein orchid
-- / -- / 1B Broadleaved upland forest, lower montane
coniferous forest, and North Coast coniferous
forest, sometimes on serpentinite soils, at elevations
of 30-1310 meters. Perennial herb in the
Orchidaceae family; blooms May-September.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Plagiobothrys chorisianus var.
chorisianus
Choris’ popcorn-flower
-- / -- / 1B Mesic areas of chaparral, coastal prairie, and coastal scrub at elevations of 15-160 meters. Annual herb
in the Boraginaceae family; blooms March-June.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Plagiobothrys diffusus
San Francisco popcorn-flower
-- / SE / 1B Coastal prairie and valley and foothill grassland at elevations of 60-360 meters. Annual herb in the
Boraginaceae family; blooms March-June.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Polygonum hickmanii
Scotts Valley polygonum
FE / SE / 1B Valley and foothill grassland on mudstone and sandstone at elevations of 210-250 meters. Annual
herb in the Polygonaceae family; blooms: MayAugust.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Senecio aphanactis
Chaparral ragwort
-- / -- / 2B Chaparral, cismontane woodland, and coastal scrub, sometimes on alkaline soils, at elevations of 15-800
meters. Annual herb in the Asteraceae family;
blooms January-April.

Unlikely
No suitable habitat is present within the survey area.

Sidalcea malachroides
Maple-leaved checkerbloom
-- / -- / 4 Broadleaved upland forest, coastal prairie, coastal scrub, North Coast coniferous forest, and riparian
woodlands, often in disturbed areas, at elevations of
2-730 meters. Perennial herb in the Malvaceae
family; blooms March-August.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.
461
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Species Status
(Service/CDFW/CNPS) General Habitat Potential Occurrence within Survey Area Stebbinsoseris decipiens
Santa Cruz microseris
-- / -- / 1B Broadleaved upland forest, closed-cone coniferous forest, chaparral, coastal prairie, coastal scrub, and
openings in valley and foothill grassland,
sometimes on serpentinite, at elevations of 10-500
meters. Annual herb in the Asteraceae family;
blooms April-May.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Trifolium buckwestiorum
Santa Cruz clover
-- / -- / 1B Gravelly margins of broadleaved upland forest, cismontane woodland, and coastal prairie at
elevations of 105-610 meters. Annual herb in the
Fabaceae family; blooms April-October.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

Trifolium polyodon
Pacific Grove clover
-- / SR / 1B Mesic areas of closed-cone coniferous forest, coastal prairie, meadows and seeps, and valley and
foothill grassland at elevations of 5-120 meters.

Annual herb in the Fabaceae family; blooms AprilJuly.

Not Present
No suitable habitat is present within the survey area
and this species was not identified during the May
2024 survey.

STATUS DEFINITIONS
Federal
FE = listed as Endangered under the federal Endangered Species Act FT = listed as Threatened under the federal Endangered Species Act FC = Candidate for listing under the federal Endangered Species Act UR = Species that have been petitioned for listing under the ESA and for which a 90 day and/or 12 Month finding has not been published in the Federal Register, as well as species being reviewed through the candidate process but the CNOR has not yet been signed -- = no listing
State
SE = listed as Endangered under the California Endangered Species Act ST = listed as Threatened under the California Endangered Species Act SC = Candidate for listing under California Endangered Species Act SR = listed as Rare under the California Endangered Species Act CFP = California Fully Protected Species
CSC = CDFW Species of Concern
-- = no listing
California Native Plant Society
1B = California Rare Plant Rank 1B species; plants rare, threatened, or endangered in California and elsewhere 2B = California Rare Plant Rank 2B species; plants rare, threatened, or endangered in California, but more common elsewhere -- = no listing

POTENTIAL TO OCCUR
Present = known occurrence of species within the site; presence of suitable habitat conditions; or observed during field surveys High = known occurrence of species in the vicinity from the CNDDB or other documentation; presence of suitable habitat conditions Moderate = known occurrence of species in the vicinity from the CNDDB or other documentation; presence of marginal habitat conditions within the site Low = species known to occur in the vicinity from the CNDDB or other documentation; lack of suitable habitat or poor quality 462
Item 9 A.

Stockton Bridge Debris Project Special-Status Species Table Unlikely = species not known to occur in the vicinity from the CNDDB or other documentation, no suitable habitat is present within the site Not Present = species was not observed during surveys
463
Item 9 A.

Attachment D: Site Photos
464
Item 9 A.

Stockton Bridge Debris Mitigation Project Site Photos Attachment D
Photo 2. OHWM on the south pier of Stockton Bridge (5/14/2024).

Photo 1. Close Up Photo of OWHM on the south pier of Stockton Bridge (5/14/2024). 465
Item 9 A.

Stockton Bridge Debris Mitigation Project Site Photos Attachment D
Photo 4. Swallow nests observed on the underside of Stockton Bridge deck Photo 3. OHWM on the north pier of Stockton Bridge (5/14/2024). 466
Item 9 A.

Stockton Avenue Bridge – Bridge Pier Debris Mitigation Feasibility Report CSWST2 |
Appendix E – Stockton Avenue Bridge at Soquel Creek (Bridge No. 36C0110) Storm Debris Diversions – Structural Evaluation

467
Item 9 A.

MEMORANDUM
TO: Julia Harberson, PE, Project Manager
CSW/ST2
Date: June 27, 2024
Job No: 2024083
FROM: Thomas L. Swayze, SE
Biggs Cardosa Associates, Inc.

SUBJECT: Stockton Avenue Bridge at Soquel Creek (Bridge No. 36C0110) Storm Debris Diversions
Capitola, California
Structural Evaluation

EXECUTIVE SUMMARY
The City of Capitola has suffered an ongoing seasonal accumulation of storm debris at the Stockton Avenue Bridge (Br. No. 36C0110). The City has requested to have the existing Stockton Avenue Bridge evaluated for the potential augmentation with various storm debris diversion systems.

CSW/ST2 has been contracted by the City to provide alternatives for installation of measures to prevent storm debris accumulation at the Stockton Avenue Bridge. Biggs Cardosa is providing structural commentary and support for the development of these measures.

The following documents were provided for our review:
• Structural Plans Sheets 1-4 Capitola Bridge over Soquel Creek, dated October 23,1933
• Caltrans Bridge Inspection Reports, dated May 8, 2022, September 17, 2021, September 25,2019, September 1, 2015, September 9, 2013, October 5, 2011, October 1, 2009, May 8, 2007, May 25, 2005, May 7, 2003, May 2, 2001, and August 10, 1999,
• Caltrans Summary Load Rating Sheet dated September 3, 2019 • Emergency Coastal Development Permit from the California Coastal Commission, Emergency CDP G-3-23-0065 (Stockton Avenue Bridge, dated October 2, 2023 • City of Capitola Special Provisions and Plans for Construction of Capitola Bridge over Soquel Creek (Stockton Bridge) Repairs, Federal Project No. ER-15J7(85), dated December 5, 2023
468
Item 9 A.

Stockton Avenue Bridge
Storm Debris Diversions