Coastal Development Permit 2026 04 Wastewater Treatment and Sewer Line Rehabilit

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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APPLICANT: City of Point Arena
451 School Street
Point Arena, California 95468
OWNERS: City of Point Arena
451 School Street
Point Arena, California 95468
AGENTS: City of Point Arena
REQUEST: The City of Point Arena Wastewater District (PAWW) has requested a Coastal Development Permit to allow the repair and maintenance of the electrical system of the Wastewater Treatment Facility and related sewer main infrastructure repair. Some of the proposed work would occur within 100 feet of known wetlands. The project includes the following components:

1. Electrical and Control System will be replaced, and a new permanent standby diesel-powered generator and
automatic transfer switch will be installed to address
frequent power outages due to increased storm severity.

2. The project includes a new permanent standby dieselpowered generator, utility service transformer enclosure, meter, breaker, and automatic transfer switch. A new
concrete pad of 75 SF will be added to an already
developed area to house the new generator for electrical backup.

3. Installation of a new headworks automatic screening
system to remove non-organic solids on a continuous basis and divert these from discharge.

4. Less than one-mile length of sewer main will be replaced or repaired within existing roadways. This work will also
include three new manholes and the separation and repair of private laterals.

LOCATION: In the Coastal Zone, in the City of Point Arena, Mendocino County, at 105 Iversen Ave, and portions of Iverson Avenue, Main Street, Port Road, School Street, Mill Street and Scott Place within Point Arena, CA
APPEALABLE AREA: Appealable
TOTAL ACREAGE: APN 027-101-10 1.25 acres
GENERAL PLAN: Public Facility (PF)
ZONING: Public Facility (PF)
STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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EXISTING LAND USE(S): Sewer Treatment facility, public streets and associated utility infrastructure.

ADJACENT LAND
USE(S):

North: Residential development
South: Undeveloped open space, Arena Creek
East: Undeveloped open space, residential development
West: Arena Creek, undeveloped open space, residential
development.

ENVIRONMENTAL
DETERMINATION:

Categorically exempt under sections 15301b, 15302c, 15303e and 15282k of CEQA regulations.

PROJECT DESCRIPTION: See above under request.

APPEALS: This project is appealable to the Coastal Commission.

CITY COUNCIL’S ACTION:

City Council will consider adopting approving a Coastal Development Permit by minute order for the Wastewater Treatment Facility and Sewer Main Repair and Replacement Project.

STAFF RECOMMENDATION:

The proposed project, as conditioned and mitigated, is consistent with the applicable goals and policies and regulations of the Local Coastal Program (LCP) as described in further detail in this report, therefore staff recommends approval of the CDP for this project.

SUMMARY OF REFERRAL AGENCY COMMENTS:

Coastal Commission
California Dept. of Fish and Wildlife
US Dept. of Fish and Wildlife
California Coastal Commission .

Manchester Band of Pomo
Dept. of Public Works
Water Board
STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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PROJECT BACKGROUND
Project Permitting. Generally, repair and maintenance projects are exempt from the requirement to obtain a Coastal Development Permit. However, this project requires a CDP because the City’s ordinance does not allow “repair or maintenance to facilities or structures or work located in an environmentally sensitive habitat area or within 50 feet of the edge of a environmentally sensitive habitat area, or within 20 feet of coastal waters or streams that include: b. The presence, whether temporary or permanent, of mechanized equipment or construction materials.” This project includes elements within 50 feet of ESHA wetland and within 20 feet of a stream that require mechanized equipment (to build the concrete pad for the generator and to dig out and replace lateral and main sewer lines), therefore a CDP is required.

Project History. This project was initiated in 2022, however it was stalled due to a lack of funding and staffing. The City recently entered into a contract with an engineering firm to design the improvements for the WWTF and a portion of the City’s sewer main. The City received funding from the Water Board to undertake this design and permitting process and the Water Board may fund a portion of the project construction.

The proposed project includes the following key environmentally beneficial components:

1. Abandonments of a failing sewer main.

1. Replacement of failing sewer laterals to reduce I&I.

2. Replacement of sewer main lines.

3. Installation of a backup generator to allow the sewer treatment facility to function at maximum capacity in storm events when power is most likely to be shut off.

4. Installation of a screening devise to remove all non-organics from the sewer treatment system, so that it functions optimally.

GENERAL PLAN CONSISTENCY
A sewer treatment facility is a conditionally permitted use in the Public Facilities zoning district, per the General Plan.
(C) Public Facility--(PF) This designation accommodates such uses as schools, public utilities, public facilities, publicly-owned libraries and publicly-owned parking lots and facilities, public utility service and storage yards, sewer facilities, community centers, and similar uses. All proposed uses and developments shall be subject to securing a use permit.

However, a Use Permit is not required in this case as this property is already utilized as a sewer treatment plant and the proposed activities are limited to repair and maintenance.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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A few policies in the Coastal General Plan are relevant to this project. The table below analyzes project consistency with relevant policies of the City’s General Plan.

Sewage Collection & Disposal
Policies
Project Conformance to Policy
Throughout the General Plan, connection to
municipal water and sewer systems are required
by many different policies and regulations.

Connection to municipal water and sewer
systems shall be required and the availability of
adequate municipal water and sewer systems as
well as adequate roadway capacity shall be
demonstrated prior to approval of the permit.

The proposed project conforms with these
policies as it would result in the repair and
maintenance of existing sewer services and
distribution system to existing development
throughout the downtown core.

7.3. No sewer service may be extended to
lands zoned Agriculture Exclusive-AE or to areas
outside the "urban limit line".

The proposed project includes only work
within the urban limit line.

7.8. To reduce the sewage collection
infiltration problem, and to further expand wetweather sewage treatment capacity, the City should continue applying a testing and repair
program to the sewage collection system.

This project is designed to repair and
address some of the stormwater infiltration
into the sewer system.

7.16. All sewer improvement programs shall
conform with the provisions of the
environmentally sensitive habitat areas (ESHA)
policies, including but not limited to the riparian
buffer zone for Point Arena Creek.

The proposed project conforms with this
policy as discussed in the biological section
of this staff report.

Development Standards
The zoning code does not set explicit development standards for the Public Facilities zoning district.

Section 4.11.B Minimum lot area, depth, setbacks, and building heights to be determined by the Planning Commission.

The proposed project is located within the existing development footprint of the WWTF, however the proposed generator and fuel tank is proposed to extend further to the south and closer to Arena Creek, which is analyzed in the biological section of the report.

The image below illustrates the proposed plan set overlayed on the aerial for the WWTF.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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Traffic & Parking
The proposed project will not result in an increase in sewer treatment capacity or an increase in staffing at the sewer treatment plant. Therefore, the project does not include additional parking nor is additional parking required by the zoning code.

Landscaping and Screening 18.25.140
The project site currently includes mature landscaping and fencing adjacent to the street.

The proposed application does not include any new landscaping or changes to the existing landscaping. The existing landscaping complies with the requirements of the zoning ordinance as illustrated in the image below.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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Coastal Development Permit Analysis

PUBLIC ACCESS
The City’s LCP and the
Community Action Plan
(CAP) do not identify any
existing or proposed trail
routes through the project
site. This location is not
appropriate for public
access, and should not be
required as part of this
project.

HAZARDS
The proposed Project will comply with the policies of the General Plan Community Health and Safety Element as follows:

Community Health And Safety Element Compliance Analysis

3.2.2. Buildings within flood prone areas subject
to inundation or erosion shall be prohibited
unless no alternative building site exists on the
property and proper mitigation measures are
provided to minimize or eliminate risks to life and
property from flood hazard.

The existing WWTF is located in an area
subject to 100- and ten-year storm flooding.

There is no alternative building site for the
project that is less susceptible to flooding.

6.B.1. Development shall be designed and
managed to minimize the introduction of pollutants
into coastal waters (including the ocean, estuaries,
wetlands, rivers, streams, and lakes) to the
maximum extent practicable.

6.B.2. Development shall be designed and
managed to minimize increases in runoff volume
and peak runoff flow rate, to avoid detrimental
water quality impacts caused by excessive erosion
and sedimentation.

The project proposes to reduce potential
detrimental water quality impacts through the
reduction of I&I, the utilization of a screening
devise to remove all non-organics from the
waste stream, and the installation of a
generator for power backup. Both of these
systems will minimize the introduction of
pollutants into coastal waters in the event of
large storms and flooding.

The project includes no net increase to
impervious surfaces so it will not increase
runoff volume or peak flow rate.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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Flooding: The property is located in the 100-Year Flood Zone, according to the FEMA flood map (Flood Insurance Rate Map 060185-1740-G).

Staff recommends the special condition below to reduce the potential for accidental release of diesel fuel as a result of the generator installation.

Special Condition 1. The applicant shall only use propane fuel to power the generator. Diesel fuel is not permitted.

Geology: The project is located in a flat area without steep slopes, according to the General Plan’s Natural Hazards Map.

Fire. The Project site is relatively flat and is adjacent to Arena Creek and residential development. This area is a moderate fire severity zone on the State Calfire Fire Hazard Severity Zone Map. The proposed generator has the potential to increase fire risk, however this risk is somewhat offset by the special condition that requires a propane rather than a diesel storage tank.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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VISUAL RESOURCES
Visual resource policies apply to how development is viewed from public areas, with the intent that any adverse impacts to public views are avoided to the extent feasible.

While the proposed project is located within the City’s mapped viewshed, as depicted on the Point Arena Scenic Corridors map, the project would not have an impact on visual resources because the treatment plant is located in a ravine out of the viewshed from the public right of way on Port Road.

The Coastal General Plan includes
one relevant visual resources
policy as follows:

14. Public views, viewsheds, view
corridors, buildings of architectural and
historical merit, existing topographic
features, and existing important clusters of
trees, shall be preserved and maintained.

Figure 1: View of WWTF from Public Right of way
STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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NATURAL RESOURCES
Open Space & Conservation Element Compliance Analysis

7.1. Environmentally-sensitive habitat areas shall be protected against any significant disruption of habitat values, and only uses dependent on such resources shall be allowed within such areas.

All proposed repair and
maintenance activities will occur in
already developed areas. Existing
fencing at the sewer treatment
plant prohibits further
encroachment into Arena Creek
and the Shining Willow Grove,
thereby protecting environmentally
sensitive habitat.

7.3. Every effort should be made to enhance wildlife habitats and maintain wildlife travel corridors along waterways and within riparian corridors, within the city and its environs.

The project does not include new
development in wildlife travel
corridors.

7.14. Since the Point Arena Mountain Beaver was listed as an endangered species on December 12, 1991, with beaver habitat potentially located along Point Arena Creek, the City shall establish a 500 feet riparian setback area ("Mountain Beaver Buffer Area") from the centerline of the stream as recommended by the United States Fish and Wildlife Service (USFWS). In addition, fences are prohibited within 15 feet of the center line to allow for wildlife migration along the travel corridor. Disturbance of the streambed is prohibited. Through zoning and subdivision regulations, the City shall restrict development in areas which contain identified rare or endangered species of plants and animals, including the Point Arena Mountain Beaver.

All proposed repair and
maintenance activities will occur in
already developed areas.

Proposed development is minor
and would not directly or indirectly
impact PAMB or PAMB habitat.

Section 18.25.220 provides standards for development to protect natural resources. This section includes policies prohibiting and regulating new development (including vegetation removal) within or adjacent to environmentally sensitive habitat areas (ESHAs), and ESHA buffer zones are required between proposed development and identified ESHA.

Wetlands. SHN prepared a wetland delineation and biological resources studies for the entirety of the project site area as illustrated in the map on the next page. As illustrated in the map and the table below, SHN identified two wetland features, namely TP4 a USACE and Coastal Act 917 SF wetland ditch along School Street and TP2 a 1,332 SF coastal act wetland on Iverson Avenue. These wetland features are described in grater detail below.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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• TP4. A three-parameter wetland feature was observed south of SR 1 at TP4 within a roadside drainage ditch. Very little vegetation was present within the wetland, reflecting regular flooding and dense shade from planted Monterey cypress trees along the road. Soils were completely saturated at the time of inspection and best professional judgment was used to determine hydric soil conditions within this feature (see Appendix 4, TP4 for more information).

This wetland totaled approximately 719 square feet (SF). The wetland was artificially induced for the drainage of stormwater from SR 1 and wetland habitat is marginal due to the proximity to the roadway and lack of herbaceous vegetation.
• TP2. A single two-parameter feature meeting the CCC wetland definition occurs off Iverson Avenue at TP2 within a single continuous roadside swale connected by a culvert. A drainage inlet (DI) adjacent to the feature collects stormwater from the north side of Iverson Avenue and directs it into wetlands on the south side of Iverson Avenue. The total area of the coastal wetland covered approximately 1,332 SF. Dominant species included pennyroyal (Mentha pulegium), tall flatsedge (Cyperus eragrostis), and English plantain (Plantago lanceolata). Non-native planted landscape vegetation was also present within the area, but were not included in hydrophytic vegetation-dominance calculations because they do not reflect wetland conditions. Wetland hydrology STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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indicators were observed, but no hydric soils were present. The coastal wetland was artificially induced for the drainage of stormwater from Iverson Avenue and wetland habitat is marginal due to the proximity to the roadway, non-native species dominance, and lack of standing water due to artificial drainage.

Special Status Plans and Natural Communities. The biological survey also identified a small patch of Horkelia just uphill from the sewer treatment facility along Iverson Ave and a grove of Shinning Willow in the riparian corridor adjacent to Arena Creek. • Shining Willow Grove. One sensitive vegetation community, a shining willow grove (Salix lucida ssp. lasiandra Forest & Woodland Alliance), was observed along the southwestern boundary of the study area along Point Arena Creek.

Sensitive vegetation communities, with a rank of S3 or lower, require California Environmental Quality Act (CEQA) analysis if potential impacts may occur because of the proposed project and are considered ESHA by the CCC. However, this vegetation alliance has a global heritage rank of G3/G4 and a state rank of S3.2, as defined by the Manual of California Vegetation and subsequent online revisions of CDFW Natural Communities list. Therefore, the presence of this species does not necessitate the preparation of a CEQA document. Additionally, the project will not result in any encroachment on this natural community. However, the project as proposed includes the development of a new generator and standby diesel tank which would encroach into the Shining Willow Grove buffer (to the south) and the Arena Creek buffer than the existing building. Therefore, the special condition below is recommended to address this issue:

Special Condition 2: The applicant shall relocate the proposed generator to the east or north side of the sewer treatment plant building to avoid encroaching into the buffer area for the Shinning Willow Grove and Arena Creek.
• Horkelia. The botanical survey was able to identify the Horkelia species only to a genus level, due to a lack of diagnostic features present, as the plants were in a vegetative state. One special-status Horkelia species was found to have a moderate or high potential to occur within this region. The biological study recommended a follow-up late-season survey prior to construction is needed to verify the species observed. However, the location of the Horkelia genus population is on a steep hillside between Iverson Ave and the Sewer Treatment Facility. Due to the topography of this area, no inadvertent disturbance will occur in this area during construction. Therefore, a further biological survey is not necessary because this species will be avoided and habitat protective fencing will be installed along the length of the road adjacent to the Horkelia population to STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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ensure that the population (whether special status or not) is not impacted by the project.

Figure 2: area of Potential ESHA (Horkelia Sp.)
• PAMB. The bluff face to the west of the project location is a known PAMB habitat location. However, the proposed scope of work at the Sewer Treatment Plant is minor and will not result in any noises or activities that would be disruptive to PAMB or PAMB habitat.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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SHN’s biological analysis included a number of avoidance and minimization measure to incorporate into the Coastal Development Permit as special conditions as follows:

Special Condition 3. For the repair and maintenance activities at the WWTF, the applicant shall place temporary fencing and sediment and/or erosion control barriers (such as, silt fence, fiber rolls, etc.) between the construction boundaries and the sensitive biological resources (shining willow grove sensitive vegetation community and Point Arena Creek). Appropriate barriers shall be utilized based on substrate and slope, and a combination of barriers may be prudent. Fencing placement will ensure the maximum buffer possible between construction activities and sensitive resources.

Special Condition 4. For all sewer main repairs and replacements along existing roadways the applicant shall:
a. Install temporary construction fencing between the wetlands within the roadside drainages and the Horkelia population and project-related areas of disturbance to minimize the risk of accidental encroachment or impact. b. Any off-road activities, including excavation and equipment staging areas, shall be clearly delineated outside of the 100-ft buffer zones from all sensitive resources identified along the roadways (such as the USACE and California Coastal wetlands and Horkelia).
c. When excavation is to occur within 100 ft of sensitive resources, it shall stay within the established roadway. In addition, appropriate temporary sediment control measures shall be implemented to prevent any impacts to such resources during construction activities.

Special Condition 5. Prior to issuing a grading permit the applicant shall submit final plans and specifications to the City planner for review. The City planner shall ensure the following:
a. All temporary construction fencing locations shall be illustrated on all construction documents and plans.
b. A ‘Do Not Disturb’ area shall be noted within the buffer area surrounding sensitive resources on all construction-related documents. c. In areas where soil disturbance and vegetation removal is inevitable, only native species (seed) shall be specified and used to revegetate. This includes erosion control seed mixes.
d. The specification shall allow only seed-free straw as ground cover to minimize erosion potential and non-native species introduction following project completion.
e. Overall, the project shall limit ground disturbance to the extent necessary to STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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accomplish project goals.

Special Condition 6. A qualified biologist shall flag or stake the location of the temporary fencing to ensure correct placement.

ARCHAEOLOGICAL RESOURCES
A cultural resources inventory was not prepared for the project as it is not feasible to dig within the roadway to complete an archaeological survey prior to the start of actual construction, as the roads are fully paved. Furthermore, Staff recommends Special Condition 7 and 8 to address any accidental discovery.

Special Condition 7: Unanticipated Discovery of Cultural Resources.

If cultural resources are encountered during construction activities, all onsite work shall cease in the immediate area and within a 50-foot buffer of the discovery location. A qualified archaeologist will be retained to evaluate and assess the significance of the discovery, and develop and implement an avoidance or mitigation plan, as appropriate. For discoveries known or likely to be associated with Native American heritage (precontact sites and select historic period sites), the Manchester Band of Pomo Indians (contact: F. Jaime Cobarrubia, Chairperson, (707) 882-2788 or (707) 882-3417) should also be contacted immediately to evaluate the discovery and, in consultation with the project proponent, the County, and consulting archaeologist, develop a treatment plan in any instance where significant impacts cannot be avoided. Precontact materials which could be encountered include obsidian and chert debitage or formal tools, grinding implements, (e.g., pestles, handstones, bowl mortars, slabs), locally darkened midden, deposits of shell, faunal remains, and human burials. Historic archaeological discoveries may include 19th century building foundations, structural remains, or concentrations of artifacts made of glass, ceramics, metal or other materials found in buried pits, wells or privies.

Special Condition 8: Encountering Native American Remains.

If potential human remains are discovered during the project, the following steps will be taken:
• Stop all work within 100 feet.
• Immediately contact the City of Point Arena and the county coroner. • Secure location, but do not touch or remove remains and associated artifacts.
• Do not remove associated spoils or pick through them. • Record the location and keep notes of all calls and events; and • Treat the find as confidential and do not publicly disclose the location.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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Provided these treatment measures are undertaken during any inadvertent discovery of archaeological resources or human remains, the project will not have a significant impact on cultural resources and is consistent with the City’s cultural resource protection policies.

PROJECT FINDINGS AND CONDITIONS
Recommended Action
Pursuant to the provisions of Chapter 18.30.080 and Chapter 18.30.090 of the Point Arena Municipal Code, the City Council approves the proposed project and adopts the following findings and conditions of approval.

Coastal Development Permit Findings (18.30.080)

1. The proposed development as described in the application and accompanying materials, as modified by any conditions of approval, is in conformity with the city of Point Arena’s certified local coastal program and will not adversely affect coastal resources.

2. Feasible mitigation measures and/or alternatives have been incorporated to substantially lessen any significant adverse effects of the development on the environment.

3. The proposed use is consistent with the purposes of the zone in which the site is located.

4. The proposed development is in conformance with the city of Point Arena’s general plan.

5. The proposed location of the use and conditions under which it may be operated or maintained will not be detrimental to the public health, safety, or welfare, or materially injurious to properties or improvements in the vicinity.

6. Services, including, but not limited to, water supply, sewage disposal, solid waste, and public roadway capacity have been considered and are adequate to serve the proposed development.

Required Findings for Development Located within ESHA and ESHA Buffers Sec. 5.22

1. The proposed development has been sited and designed to prevent significant impacts to the habitat values, functional capacity, and species diversity of the adjacent riparian habitat area, and

2. The proposed development is compatible with the continuance of such habitat areas.

3. Soils and vegetation removal and disturbances shall be minimized.

4. Non-native vegetation shall not be planted except for the continuance of existing agricultural practices.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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Standard Conditions

1. This action shall become final on the date of approval. No appeal periods apply.

The permit shall expire and become null and void at the expiration of two years after the effective date, except where construction and use of the property in reliance on such permit has been initiated prior to its expiration. To remain valid, progress towards completion of the project must be continuous. The applicant has sole responsibility for renewing this application before the expiration date. The City will not provide a notice prior to the expiration date.

2. The use and occupancy of the premises shall be established and maintained in conformance with the provisions of Title 18 of the Point Arena Municipal Code.

3. The application, along with supplemental exhibits and related material, shall be considered elements of this permit, and that compliance therewith is mandatory, unless an amendment has been approved by the City of Point Arena Planning Commission or its successor agency.

4. This permit shall be subject to the securing of all necessary permits for the proposed development from City, State and Federal agencies having jurisdiction.

5. The applicant shall secure all required building permits for the proposed project as required by the Building Inspection Division of the Mendocino County Department of Planning and Building Services.

6. This permit shall be subject to revocation or modification upon a finding of any one or more of the following:
a. The permit was obtained or extended by fraud.
b. One or more of the conditions upon which the permit was granted have been violated.
c. The use for which the permit was granted is conducted so as to be detrimental to the public health, welfare or safety, or to be a nuisance. d. A final judgment of a court of competent jurisdiction has declared one or more conditions to be void or ineffective or has enjoined or otherwise prohibited the enforcement or operation of one or more such conditions.

7. This permit is issued without a legal determination having been made upon the number, size or shape of parcels encompassed within the permit described boundaries. Should, at any time, a legal determination be made that the number, size or shape of parcels within the permit described boundaries are different than that which is legally required by this permit, this permit shall become null and void.

8. A two-year limitation applies to all coastal development, variance, conditional use, design review, planned residential development, or comprehensive development plan permits. If development has not commenced within two years from the granting of a permit, the permit shall be void, except where construction and or use of the property in reliance on such permit has been initiated prior to its expiration.

To remain valid, progress toward completion of the project must be continuous.

On or before the date of expiration of a coastal development permit, variance, conditional use permit, design review, planned residential development, or STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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comprehensive development plan, the person holding the permit shall apply for a renewal of said permit if the use is to be continued beyond the date of expiration or the development cannot be initiated prior to expiration. A renewal could be processed under Administrative review by the City, on a cost-recovery basis, for a renewal period of two years.

Special Conditions

1. The applicant shall only use propane fuel to power the generator. Diesel fuel is not permitted.

2. The applicant shall relocate the proposed generator to the east or north side of the sewer treatment plant building to avoid encroaching into the buffer area for the Shinning Willow Grove and Arena Creek.

3. For the repair and maintenance activities at the WWTF, the applicant shall place temporary fencing and sediment and/or erosion control barriers (such as, silt fence, fiber rolls, etc.) between the construction boundaries and the sensitive biological resources (shining willow grove sensitive vegetation community and Point Arena Creek). Appropriate barriers shall be utilized based on substrate and slope, and a combination of barriers may be prudent. Fencing placement will ensure the maximum buffer possible between construction activities and sensitive resources.

4. For all sewer main repairs and replacements along existing roadways the applicant shall:
a. Install temporary construction fencing between the wetlands within the roadside drainages and the Horkelia population and project-related areas of disturbance to minimize the risk of accidental encroachment or impact. b. Any off-road activities, including excavation and equipment staging areas, shall be clearly delineated outside of the 100-ft buffer zones from all sensitive resources identified along the roadways (such as the USACE and California Coastal wetlands and Horkelia).
c. When excavation is to occur within 100 ft of sensitive resources, it shall stay within the established roadway. In addition, appropriate temporary sediment control measures shall be implemented to prevent any impacts to such resources during construction activities.

5. Prior to issuing a grading permit the applicant shall submit final plans and specifications to the City planner for review. The City planner shall ensure the following:
a. All temporary construction fencing locations shall be illustrated on all construction documents and plans.
b. A ‘Do Not Disturb’ area shall be noted within the buffer area surrounding sensitive resources on all construction-related documents. c. In areas where soil disturbance and vegetation removal is inevitable, only native species (seed) shall be specified and used to revegetate. This includes erosion control seed mixes.

STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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d. The specification shall allow only seed-free straw as ground cover to minimize erosion potential and non-native species introduction following project completion.
e. Overall, the project shall limit ground disturbance to the extent necessary to accomplish project goals.

6. A qualified biologist shall flag or stake the location of the temporary fencing to ensure correct placement.

7. Unanticipated Discovery of Cultural Resources. If cultural resources are encountered during construction activities, all onsite work shall cease in the immediate area and within a 50-foot buffer of the discovery location. A qualified archaeologist will be retained to evaluate and assess the significance of the discovery, and develop and implement an avoidance or mitigation plan, as appropriate. For discoveries known or likely to be associated with Native American heritage (precontact sites and select historic period sites), the Manchester Band of Pomo Indians (contact: F. Jaime Cobarrubia, Chairperson, (707) 882-2788 or (707) 882-3417) should also be contacted immediately to evaluate the discovery and, in consultation with the project proponent, the County, and consulting archaeologist, develop a treatment plan in any instance where significant impacts cannot be avoided. Precontact materials which could be encountered include obsidian and chert debitage or formal tools, grinding implements, (e.g., pestles, handstones, bowl mortars, slabs), locally darkened midden, deposits of shell, faunal remains, and human burials. Historic archaeological discoveries may include 19th century building foundations, structural remains, or concentrations of artifacts made of glass, ceramics, metal or other materials found in buried pits, wells or privies.

8. Encountering Native American Remains. If potential human remains are discovered during the project, the following steps will be taken:
• Stop all work within 100 feet.
• Immediately contact the City of Point Arena and the county coroner. • Secure location, but do not touch or remove remains and associated artifacts.
• Do not remove associated spoils or pick through them. • Record the location and keep notes of all calls and events; and • Treat the find as confidential and do not publicly disclose the location.

Staff Report prepared by:
________________________________ ________________
Marie Jones, City Planner Date
STAFF REPORT CDP# 2026-04 (City of Point Arena Wastewater Treatment Facility) July 21, 2026
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ATTACHMENTS

1. Project Site Plan

2. WWTF Floor Plan Illustrating Repairs and Upgrades

3. Narrative of Electrical upgrades

4. Biological Report

5. Draft Notice of Exemption (CEQA)

6. Memo Analyzing Project for Notice of Exemption
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City of Point Arena
Collection System Improvements
Point Arena, California
Sanitary Sewer Main Lines
SHN 421062
August 2022 421062-SS-PROJECT-FIG

POINT ARENA WWTP ELECTRICAL UPGRADE

RICHARD SAMPLE, PE
MAY 13, 2022

BUILDING AREA PLAN - EXISTING ELECTRICAL

HEADWORKS
PumpRoom
Workshop
ToiletRoom
LaundryRoom
LabRoom Elect
Room
ChlorineShed

PROPOSED NEW FEEDER
NORTH SCALE: 3/16"=1'-0"

POINT ARENA WWTP ELECTRICAL UPGRADE

RICHARD SAMPLE, PE
MAY 13, 2022 HEADWORKS Pump Room Workshop
ToiletRoom
LaundryRoom
LabRoom Elect
Room
ChlorineShed

BUILDING AREA PLAN - PROPOSED NEW ELECTRICAL SEE EXISTING ELECTRICAL PLAN FOR FURTHER ROUTING

OF PROPOSED NEW FEEDER
NORTH SCALE: 3/16"=1'-0"
Point Arena WWTP Elect Equip List 5-13-22 1

POINT ARENA WWTP ELECTRICAL UPGRADE

ELECTRICAL EQUIPMENT / FEEDER LIST

NO EQUIPMENT DESCRIPTION STATUS
1 UTILITY SERVICE CTS, METER, DISCONNECT BREAKER Remove 2 MOTOR CONTROL CENTER (MCC) Remove
3 PLANT CONTROL PANEL (PCP) Remove
4 PUMP NO. 2 PACKAGED VFD CONTROLLER Remove
5 EXISTING UNDERGROUND POWER UTILITY SERVICE FEEDER Remove 6 POWER / TELEPHONE UTILITY SERVICE POLE Remain
7 POLE MOUNTED UTILITY SERVICE TRANSFORMERS (2) Remain
8 POWER HANDHOLE TO INTERCEPT EXISTING FEEDER Provide
9 NEW UNDERGROUND POWER UTILITY SERVICE FEEDER Provide
10 UTILITY SERVICE CURRENT TRANSFORMER ENCLOSURE Provide 11 UTILITY SERVICE METER Provide
12 UTILITY SERVICE BREAKER Provide
13 AUTOMATIC TRANSFER SWITCH Provide
14 STANDBY GENERATOR Provide
15 DIESEL FUEL TANK Provide
16 NEW PLANT CONTROL PANEL (PCP) Provide
17 NEW MOTOR CONTROL CENTER (MCC) Provide
1 R ic h a r d S a m p le E n g in e e r in g
1 1 9 7 M a g n o lia A v e . R e d d in g , C A 9 6 0 0 1 5 3 0 -2 4 2 -1 1 3 4 E -m a il:R ic h a rd @ rs e in te g rity .c o m DATE: May 13, 2022
TO: LORY WIDMER, SHN ENGINEERS AND GEOLOGISTS, INC.

FROM: RICHARD A. SAMPLE, P.E.

PROJECT: POINT ARENA WASTEWATER TREATMENT PLANT UPGRADE SUBJECT: PROPOSED ELECTRICAL MODIFICATIONS
On Wednesday, May 11, I performed an onsite inspection of the electrical power distribution, motor control center and plant SCADA system equipment to document the condition of the equipment and propose necessary upgrades.

The present electrical equipment, originally provided during 1979 plant upgrades, has surpassed the normal expected life and is showing significant signs of wear and corrosion.

The motor control center has been modified numerous times and has been left in a condition which has compromised both reliability of system performance and operator safety. Components used in both the motor control center and plant SCADA panel are outdated making replacement either difficult or impossible. All power service equipment (except pole mounted utility transformers), motor control center equipment and plant SCADA panel equipment should be replaced as soon as reasonably possible.

The following list is a description of proposed electrical modifications to be made at the Point Arena Wastewater Treatment Plant.

Existing equipment and material to be removed

1. Power utility service equipment including utility current transformers and meter, service breaker and associated enclosure. Service feeder conductors routed between base of pole and service equipment are to be removed. Underground portion of conduit is to be abandoned. Pole mounted transformers are to remain.

2. Motor control center (MCC) containing surface aerator, Tornado mixer/blower unit, effluent pump motor starters associated with process equipment and breaker serving Panel A and various package process system panels.

3. Freestanding enclosure containing variable frequency drive (VFD) controller serving Effluent Pump No. 2.

4. Plant control panel.

5. Auto dialer equipment.

6. Effluent wet well level sensing floats.

7. Ultrasonic level sensor at Parshall flume.

8. Selector switches and solenoid valve associated with chlorine mixing.

9. Power feeder conductors originally routed between the MCC and disconnect switches associated with lagoon aerators and mixer/blower equipment. Conduits are to be reused.

10. Power feeder conductors originally routed between the MCC and effluent pump Nos 1 & 2. Portion of conduits routed underfloor are to be reused. 2 Proposed new equipment to be provided

1. Power utility service consisting of underground feeder between pole and building exterior, utility current transformers, meter and service disconnect surface mounted on outside of building south wall.

2. Standby power system equipment consisting of 100KW diesel engine driven generator, and automatic transfer switch surface mounted on outside of building south wall.

3. Motor control center (MCC) equipment containing electronic soft starter for control of two effluent pumps, constant speed starters for control of two aerators and breakers to power various packaged control panels.

4. Plant control panel consisting of freestanding enclosure, Allen Bradley Micrologics processor, panel door mounted HMI, UPS power backup, discrete and analog I/O as required for interface with MCC mounted motor controllers, packaged system equipment panels, influent flowmeter, effluent wet well level sensors, chlorine alarm, standby power equipment status signals and interface with auto dialer equipment.

5. Auto dialer equipment with 16 discrete alarm points for remote alarm annunciation over utility phone service.

6. Power and signal interface with new bar screen equipment packaged system panel.

7. Signal interface with existing comminutor packaged system panel.

8. Signal devices and circuitry associated with upgrades to chlorine system equipment.

9. Level transducer equipment for primary effluent wet level sensing.

10. Level float switches for secondary effluent wet well level sensing.

Attachments:
 Existing Electrical Configuration Plan
 Proposed New Electrical Configuration Plan
 Electrical Equipment / Feeder List

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc Botanical Resources and Wetland
Delineation Report
Point Arena Sanitary Collections System
Improvement Project
Point Arena, California
Phone: (707) 822-5785 Email: [email protected]
Web: shn-engr.com • 1062 G Street, Ste. I, Arcata, CA 95521-5800 Prepared for:

City of Point Arena
October 2023
421062
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc

Botanical Resources and Wetland
Delineation Report

Point Arena Sanitary Collections System
Improvement Project
Point Arena, California
Prepared for:

City of Point Arena
Prepared by:

1062 G Street
Arcata, CA 95521-5800
707-822-5785
October 2023
QA/QC:JLS
Reference: 421069
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc i
Table of Contents
Page
Abbreviations and Acronyms .....................................................................................................................ii

1.0 Introduction ...........................................................................................................................................1

1.1 Project Location .......................................................................................................................1

1.2 Project Description ..................................................................................................................1

1.3 Existing Conditions ..................................................................................................................4

1.4 Site Hydrology ..........................................................................................................................5

1.5 National Wetlands Inventory .................................................................................................5

2.0 Methods..................................................................................................................................................6

2.1 Botanical and ESHA Survey Methods....................................................................................6

2.2 Wetland Delineation Methods ...............................................................................................7

2.2.1 Wetland Delineation Vegetation Methods ..........................................................8

2.2.2 Soils Methods ..........................................................................................................9

2.2.3 Hydrology Methods ................................................................................................9

2.2.4 Ordinary High Water Mark Methods....................................................................9

3.0 Results...................................................................................................................................................10

3.1 Special-status Botanical Species..........................................................................................10

3.2 Environmentally Sensitive Habitat Areas ...........................................................................11

3.2.1 Sensitive Natural Communities ..........................................................................11

3.3 Wetland Results and Discussion..........................................................................................12

3.3.1 Three-parameter wetlands..................................................................................12

3.3.2 CCC wetlands.........................................................................................................12

3.3.3 Upland Area...........................................................................................................13

3.3.4 Ordinary High Water Mark ..................................................................................13

4.0 Conclusions ..........................................................................................................................................13

5.0 Recommended Avoidance and Minimization Measures ...............................................................16 References ..................................................................................................................................................17 Appendices

1. Site Photos

2. Soil Map and National Wetlands Inventory

3. Species Lists

4. Data Forms
List of Illustrations
Figures Follows Page

1. Project Location Map .......................................................................................................1

2. Wetlands and ESHA..........................................................................................................1 Tables Follows Page

1. Project Location Map .......................................................................................................2

2. Wetlands and ESHA..........................................................................................................3

3. WETS Rainfall Data ...........................................................................................................5

4. TP Results, April 2023.....................................................................................................15

5. Wetland Delineation Results, April 2023 .....................................................................15 P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc ii
Abbreviations and Acronyms
Units of Measure
ft feet
in/hr inches per hour
m meters
SF square feet
Additional Terms
BIOS Biogeographical Information and
Observation System
BMP best management practice
C candidate
CC closed-circuit television
CCA California Coastal Act
CCC California Coastal Commission
CDEC California Data Exchange Center
CDFW California Department of Fish and
Wildlife
CEQA California Environmental Quality Act
CNDDB California Natural Diversity
Database
CNPS California Native Plant Society
CT candidate threatened species status
CWA Clean Water Act
D delisted species status
DI drainage inlet
DPS distinct population segment species
status
E endangered species status
ESHA Environmentally Sensitive Habitat
Area
ESU evolutionarily significant unit species
status
FAC Facultative plant species
FACU Facultative-upland wetland plant
species
FACW Facultative-wet wetland plant
species
FP fully protected species status
G1/S1 critically imperiled species heritage
rank
G2/S2 imperiled species heritage rank
G3/S3 vulnerable species heritage rank
G4/S4 apparently secure species heritage
rank
G5/S5 secure species heritage rank
GPS Global Positioning System
I/I inflow and infiltration
IPaC Information for Planning and
Conservation
Ksat Capacity of the most limiting layer to
transmit water
NGTOC National Geospatial Technical
Operations Center
NL Not listed plant species
NRCS National Resources Conservation
Service
NWI National Wetlands Inventory
OBL Obligate wetland plant species
OHWM ordinary high water mark
PAMB Point Arena Mountain Beaver
PT proposed threatened species status
PVC polyvinyl chloride
RA Rapid Assessment
Redox redoximorphic
S sensitive species status
SR State Route
SSC species of special concern
T threatened species status
TNW Traditional Navigable Waterway
TP test pit
UPL Upland plant species
U.S. United States
USACE United States Army Corps of
Engineers
USDA United States Department of
Agriculture
USFWS United States Fish and Wildlife
Service
USGS United States Geological Survey
WETS Climate Analysis for Wetlands Table
WL watch list species status
WoS Waters of the State
WoUS Waters of the United States
WWTF wastewater treatment facility
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 1 1.0 Introduction
SHN has prepared this Botanical Resources and Wetland Delineation Report for the Sanitary Collections System Improvement Project in Point Arena, California (Figure 1). This report is intended to be a summary of findings for the botanical and Environmentally Sensitive Habitat Area (ESHA) surveys, as well as to identify wetlands and other waters of the United States (WoUS) and State (WoS) within the project area, as defined by the United States Army Corps of Engineers (USACE) three-parameter wetland methodology and Ordinary High Water Mark (OHWM) methodology. Additionally, the site is within the coastal zone, requiring conformance to the California Coastal Commission’s (CCC) wetland definition.

Results from this report will help determine setbacks, guide planning and construction, and aid in project permitting to reduce impacts to botanical, non-wetland ESHA, and wetland ESHA resources potentially occurring within the study area. An assessment of impacts to the Point Arena Mountain Beaver (PAMB) is being conducted separately and is addressed in another report.

1.1 Project Location
The project is located within the city limits of the City of Point Arena, California (Figure 1) which is located within the United States Geological Survey (USGS) Point Arena 7.5-minute Quadrangle (USGS, 2015); Township 12 north, Range 17 west, Sections 12 and 13, Mount Diablo Meridian. The study area is approximately 4.77 acres and is comprised of the existing wastewater treatment facility (WWTF) facilities between the two treatment ponds, as well as the roadways containing the proposed sewer main and lateral replacement alignments, including a 15-foot buffer beyond the edge of pavement (Figure 2). The WWTF is in the southwestern border of commercial and residential development within the City of Point Arena and has a center point at 38.908401° longitude and -123.696607° latitude. (Figure 2). The site is approximately 750 meters (m) east of the Pacific Ocean at its nearest point, and the WWTF fence is approximately 7 ft northeast of Point Arena Creek at its nearest point.

1.2 Project Description
The proposed improvements to the collection system are categorized into four groupings:

1. Main Replacements

2. Lateral Separation

3. Point Repairs

4. WWTF Improvements
Improvements were selected based on their ability to prevent sanitary sewer overflows and provide inflow and infiltration (I/I) reductions, which will result in a reduction in hydraulic loading to the treatment facility.

Main Replacements
The proposed main replacements for the selected project are summarized in Table 1.

HEALDSBURG

WINDSOR
LAKE
COUNTY
SONOMA
COUNTY

WILLITS
FORT
BRAGG
UKIAH

GARBERVILLE

LAYTONVILLE
TEHAMA
COUNTY

TRINITY
COUNTY

HUMBOLDT
COUNTY
GLENN
COUNTY

MENDOCINO
COUNTY

PROJECT

VICINITY
1" = 2,000'±
0 2,000'
N

PROJECT

LOCATION
P:\Willits\2021\421062-PACollSysSRF\GIS\BA_Fig1_ProjectLocation.mxd USER: jsousa DATE: 5/31/23, 2:45PM City of Point Arena
Sanitary Collections System Improvement Project
Point Arena, California
Project Location Map
May 2023 - 421062.250 1
Figure
&3&3
& &
&
&
&
&
& &
3 3
3 3
3 3
3 3
o

RIPARIAN

SHINING
WILLOW
GROVE HORKELIA SP.

PORT RD.

IVERSON AVE.

SCHOOL ST. / SHORELINE HWY. / SR-1
SCOTT PL.

RIVERSIDE DR.

MILL ST.
"

CCC WETLAND
1,332 SF
"
3-P WETLAND
719 SF
" OFFSITE WETLAND
(CONTINUES,

NOT MAPPED)

WASTEWATER

TREATMENT

FACILITY
MAIN ST. / SR-1
OHWM
18FT

RIPARIAN RA
VEG PLOT TP1
(SEE
TP1) DI
TP2
TP3
(SEE
TP2)
TP4 TP5

EXPLANATION
&3 WETLAND TEST PIT
&3 UPLAND TEST PIT
&3 OHWM DELINEATION POINT
&3 RIPARIAN RA VEG PLOT
o DI

CULVERT
3-PARAMTER WETLAND

CCC WETLAND
HORKELIA SP.

OHWM

SHINING WILLOW GROVE EDGE

STUDY AREA
N
PHOTO SOURCE:

USDA NAIP, 2022
P:\Willits\421062-PACollSysSRF\GIS\BA_Fig2_WetlandsAndSensitiveHabitat.mxd USER: jsousa DATE: 10/30/23, 4:39PM City of Point Arena
Sanitary Collections System Improvement Project
Point Arena, California
Wetlands and Sensitive Habitat
October 2023 - 421062.250 2
Figure
0 250
1" = 250'±

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 2 Table 1. Proposed Project: Main Replacements
Sanitary
Sewer Main Proposed Project
Estimated
Length of
New Main, ft
Iverson
Avenue
Remove and replace main from SSMH-5 to SSMH-1 with PVC pipe; 8” PVC from SSMH-5 to proposed SSMH-3A; 12” PVC from proposed SSMH-3A to SSMH-1.

Add additional manhole on Iverson Avenue to join mains from Port Road and Iverson Avenue before dropping down to SSMH-1 at WWTF.
1166
Main Street
Install new main from SSMH-11 to SSMH-5 with 8" PVC. Add additional laterals to selected properties on west side of street currently served by West Main Street. Adjust depth of main to provide consistent fall and allow for proposed tie ins. Install new manhole at intersection with Scott Place. Abandon existing main in place.
1528
Port Road Replace with 8" PVC and provide consistent fall. 1070 West Main
Street
Reroute connections north of SSMH-P10 to mains on School and Main Streets. Abandon line north of SSMH-P10.

Obtain easement for remaining line between SSMH-P10 and -P5. 0 School
Street
Install new 12" PVC main. Adjust depths to provide consistent fall.

Realign main to provide sufficient separation from water main; abandon in place existing main.

Add laterals to tie in houses south of School Street which are currently served by a shared lateral that ties into West Main. 1035
Mill Street
Install 8" PVC main from SSMH-M1 to new manhole at intersection of Mill and Main Streets. Abandon main between SSMH-M1 and SSMH6.20 Scott Place
Install 8-inch PVC main and connect Scott Place residents to it.

Provide laterals to all houses on Scott Place, with cleanouts to back of walk.
262
For all main replacements, the following shall apply:
• All work will be completed within the existing public road with the exception of West Main Street. • Sewer alignment shall provide suitable separation between sanitary sewer and water utilities consistent with the California Code of Regulations.
• All laterals that are not currently polyvinyl chloride (PVC) and in good condition shall be replaced from the sewer main to the back of walk (or edge of right-of-way) where new cleanouts will be installed if they do not already exist. The City will be responsible for ownership of the lower lateral from cleanout to the main; the property owner will be responsible for the upper lateral, from the cleanout to the building.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 3 Lateral Separation
The project includes the separation of numerous residences and businesses from three shared laterals.

Lateral separation is included as part of the project because it improves the opportunities for I/I reduction by clearly delegating ownership and maintenance responsibility to a single party. When multiple parties share a failing lateral, responsibility for repairs may be ambiguous and physical access to make repairs may be limited if it is located on private property owned by others.

New Lateral to City Hall
In addition to separating laterals, the project would include a new sewer connection to City Hall. Point Arena’s City Hall building is located on State Route (SR) 1, also known as Shoreline Highway, north of the new Cypress Meadows lift station. As part of the City Hall upgrade project (separate project and permitting), the City Hall building will be taken off its existing failing septic system and be connected to the Cypress Meadows lift station. When the lift station was constructed, in preparation for this future change, the City installed approximately 285 feet of 4-inch force main pipe from the lift station along the east side of SR 1 to the north and terminated and capped the line across SR1 from the south property line of the City Hall parcel. In order to complete this new service to City Hall, the pipe must be extended across SR 1. The project will also include a directional bore across SR 1 to provide a new lateral connection to City Hall, thereby allowing it to connect to the City’s collection system when City Hall upgrades are constructed.

Point Repairs
The selected project includes a limited number of pipe repairs where root masses and/or line breaks were discovered during closed-circuit television (CCTV) inspections. These recommended point repairs are summarized in Table 2.

Table 2. Recommended Point Repairs
Pipe Segment Problem Recommended Repair
West Main north of SSMH-P9 Broken pipe and root intrusion Replace approximately 20 feet section of pipe with new to
address breaks at 3 locations.

West Main north of SSMH-P5 Root intrusion Remove root mass and perform point repair.

Riverside Main, 32 feet east of
SSMH-9
Lateral may be collapsed in
roadway.

Add cleanout at road shoulder
to provide inspection access.

Repair lateral in roadway, if
found to be damaged.

Wastewater Treatment Facility Improvements
Headworks Screening
The project includes the installing of an automatic screening device at the WWTF’s headworks. The project includes the installation of an automatic screen to remove non-organic solids on a continuous basis and divert the screenings directly into a trash receptacle.

Automatic screening technologies suitable for this size treatment facility will be evaluated and a design created for interface with the existing headworks. The existing headworks channel is narrow and may require widening in order to fit the selected automatic screening device.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 4 Plant Electrical System Upgrades
The project includes the replacement of the WWTF’s aging electrical and controls system, which has reached the end of its expected useful life. A new permanent standby diesel-powered generator, utility service transformer enclosure, meter, breaker, and automatic transfer switch will be added. These additions will power the treatment facility during power outages, which are expected to become more frequent with severe storms and public safety power outages imposed by PG&E. In addition, a new underground power utility service feeder will be installed via trenching. Both the plant electrical upgrades and the emergency generator are critically needed to provide the City with a reliable means to treat wastewater and pump effluent to the percolation ponds on a continuous basis, including during grid power outages.

1.3 Existing Conditions
The study area is comprised of approximately 4.77 acres, including a portion of the WWTF and approximately 1 mile of roadway, with estimated 15-ft buffers on either side of the pavement, within the City of Point Arena, California (Appendix 1, Photos 1-12). The existing WWTF off Iverson Avenue consists of two buildings, a paved driveway and parking area, and two wastewater treatment ponds (Figure 2), The area is surrounded by a chain-link fence, which is immediately bordered to the west and south by dense riparian vegetation along Point Arena Creek. Point Arena Creek is approximately 7 feet from the perimeter fence at its nearest point. Vegetation east of the facility includes grass and herbaceous species, small shrubs and scattered planted trees. Within the fenced area around the facility, little vegetation is present, however there is some herbaceous cover around the treatment ponds and sparse shrub cover along the perimeter fence line. The WWTF is situated at the bottom of a southwest-facing slope with rural residential development for the City of Point Arena and is approximately 60 ft above sea level.

The linear portion of the study area extends along approximately one mile of roadways and includes 15- ft buffers on either side of the road. The study area along the road includes residential and commercial development within the City of Point Arena, associated landscaped vegetation, and several grassland areas, scattered shrubs, and some planted trees along the roadside (Figure 2).

The regional geology is primarily composed of marine sedimentary rocks such as sandstone, shale, siltstone, conglomerate, and breccia (California Department of Conservation, 2015). The underlying soils in the study area have the United States Department of Agriculture (USDA)-National Resources Conservation Service (NRCS) soil series of Biaggi loam, 5 to 15 percent slopes (map unit 106); Dystropepts, 30 to 75 percent slopes (map unit 139); Mallopass loam, 5 to 15 percent slopes (map unit 183), and urban land (map unit 219), as shown on the web soil map (USDA-NCRS, 2023a; Appendix 2).

Soils are well-drained or moderately well-drained throughout the site.

A mix of native species and non-native species dominate the study area. Non-native pasture grass and ruderal species exist along the roadways throughout the project area (see Appendix 1, Photos 1, 2, and 3). Dominant species within the grassland portion of the study area included hairy oat grass (Rhytidosperma penicillatum), sweet vernal grass (Anthoxanthum odoratum), subterranean clover (Trifolium subterraneum), creeping bentgrass (Agrostis stolonifera), and velvet grass (Holcus lanatus).

Tree cover within the study area mainly includes planted roadside trees such as Monterey pine (Pinus radiata), Monterey cypress (Hysperocyparis macrocarpa), and black acacia (Acacia melanoxylon), among others. Dominant shrubs include coyote brush (Baccharis pilularis ssp. consanguinea), milkflower

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 5 cotoneaster (Cotoneaster lacteus), and California blackberry (Rubus ursinus), among others. See Appendix 3, Table 2 for a complete list of the botanical species observed within the study area, and Figure 2 for a map of the study area.

Riparian vegetation occurs along Point Arena Creek southwest of the WWTF. Wetland vegetation occurs within roadside ditches along Iverson Avenue near the WWTF and along SR 1. These features are described within Section 3.0 of this report.

The study area has seen little change over the past 20 years, as the WWTF and current development footprint in southwest Point Arena have remained in much the same way since 2003 (Google Earth, 2023).

1.4 Site Hydrology
The USDA-NRCS Climate Analysis for Wetlands Table (WETS) method was used to determine the precipitation pattern prior to the wetland assessment, compared to long-term precipitation records which establish normal precipitation levels. Certain aspects of the delineation are guided by using the WETS dataset. These norms can be compared with recent rainfall data records (Fort Bragg Station 5 N, Fort Bragg) to determine whether the field work was performed during a “below normal,” “normal,” or “above normal” rainfall period. The WETS method reviews current rainfall conditions for the previous three months prior to the initial site and test pit (TP) investigations (or the same month and two months prior if after the 15
th; Table 1; USDA-NRCS, 2023b). The TP investigations occurred on April 20, 2023. The rainfall data for April 2023, March 2023, and February 2023 were compared to the 30-year rainfall average at the Fort Bragg weather station (1991-2020). If the current rainfall of each month is between 30% and 70% of the 1991-2020 precipitation average, it is a “normal” rainfall period; if above 70%, it’s ranked “above normal”; if below 30%, it’s ranked “below normal.” The rainfall for this time period is considered “normal”, as shown in Table 3 (NOAA, 2023; USDA-NRCS, 2023b).

Table 3. WETS Rainfall Data April
Point Arena, CA
Month WETS data Rank Weight Value
April 20, 2023: TP Excavation
April 2023 Normal 2 3 6
March 2023 Above Normal 3 2 6
February 2023 Normal 2 1 2
Total
a
Normal 14
a A sum of 6-9 prior to site investigation is considered a drier than normal rainfall 10-14 prior to site investigation is considered a normal rainfall. 15-18 prior to site investigation is considered above normal rainfall.

Sources: CDEC, 2023; USDA-NRCS, 2023b

1.5 National Wetlands Inventory
The United States Fish and Wildlife Service (USFWS) National Wetlands Inventory (NWI) website has several wetland/riparian features mapped within the study area (see Appendix 2). These include freshwater emergent wetlands along Point Arena Creek, which runs south of Iverson Avenue and

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 6 directly adjacent to the WWTF, and along SR 1. The general categorization and mapping by the NWI are not intended for planning purposes because of the lack of ground-truthing. In the “Data Limitations, Exclusions and Precaution” disclaimer, it states that:
“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.”
(USFWS, 2022b)
The intention of this report is to verify this data with the addition of onsite soils, hydrology, and vegetation mapping investigations.

2.0 Methods

2.1 Botanical and ESHA Survey Methods
The botanical and ESHA survey conducted on April 20, 2023 consisted of a focused early/mid-season survey, conducted pursuant to the California Department of Fish and Wildlife (CDFW) Protocols for Surveying and Evaluating Impacts to Special-status Native Plant Populations and Natural Communities (CDFW, 2018), however only one survey was conducted. Vegetation communities were identified using the CDFW-California Native Plant Society (CNPS) Protocol for the Combined Vegetation Rapid Assessment and Releve’ Form (CDFW, 2019).

The survey protocol consisted of botanical database queries and focused botanical field survey for target species and vegetation communities within suitable and potentially suitable habitat. Prior to conducting fieldwork, the following references were reviewed:
• California Natural Diversity Database (CNDDB) query for the Point Arena and surrounding USGS

7.5-minute topographic quadrangles1(CDFW, 2023a);
• Electronic Inventory of Rare and Endangered Vascular Plants of California (CNPS, 2023b) query for a list of all botanical species reported for the Point Arena and surrounding USGS 7.5-minute topographic quadrangles
1 ;
• USFWS Information for Planning and Conservation (IPaC; USFWS, 2023a); and • Biogeographical Information and Observation System (BIOS; CDFW, 2023b).

From the database queries, lists of special-status botanical species potentially occurring within the study area were compiled and include all species reported by the CNDDB, CNPS, and IPaC. Results from the database queries are included in Appendix 3, Table 1.
1Mallo Pass Creek, Cold Spring, Eureka Hill, Gualala, Saunders Reef

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 7 Field surveys were conducted by an SHN Biologist with 12 years of experience on April 20, 2023, for all special-status botanical species potentially present in the study area. The survey was conducted over the course of 2 hours. The survey covered the entire study area totaling 4.77 acres, shown on Figure 2.

In addition to surveying for target species, a list of all botanical species encountered was compiled.

Plants were identified to the lowest taxonomic level possible to distinguish special-status species from others. A list of observed botanical species is included as Appendix 3, Table 2. Botanical nomenclature follows The Jepson Manual, Vascular Plants of California (Baldwin et al., 2012) and subsequent online revisions as well as Calflora (Calflora, 2023).

During the surveys, habitat types and vegetation composition were recorded to map vegetation communities within the study area. All vegetation communities were identified using Combined Vegetation Rapid Assessment and Releve’ Protocol (CDFW, 2019) and the Manual of California Vegetation (CNPS, 2023a) and any subsequent additions recorded in the California Natural Community List (CDFW, 2023c). Vegetation communities within the study area are discussed further in the Sensitive Natural Communities and Other Habitats section and are mapped on Figure 2, which shows ESHA vegetation communities.

2.2 Wetland Delineation Methods
Wetland delineation fieldwork was conducted on April 20, 2023. Wetland delineation methods described in U.S. Army Corps of Engineers Wetlands Delineation Manual (Environmental Laboratory, 1987) and The Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountains, Valleys, and Coast Region (Version 2.0; USACE, 2010) were used to identify potential wetlands and other waters. The routine method for wetland delineation described in the Environmental Laboratory 1987 manual was used to identify potential wetlands within the study area. The USACE method relies on a three-parameter approach, in which criteria for hydrophytic vegetation, hydric soils, and wetland hydrology must each be met (present at the point of field investigation) to conclude that an area qualifies as a wetland. Additionally, the CCC requires one of the three wetland parameters be present for an area to qualify as a coastal wetland, with particular focus on hydrology indicators. Mapping reflects CCC and USACE requirements by showing areas meeting one, two, and three parameters (see Figure 2).

Hydrophytic vegetation refers to plant species known to be adapted to wetland sites. To classify the hydrophytic plants onsite, the most recent Western Mountains, Valleys, and Coast 2020 Regional Wetland Plant List was used (USACE, 2020). Synonyms were checked for species that did not appear on the USACE wetland plant list. Plant species were classified as:
• Obligate (OBL)–almost always occurs in wetlands
• Facultative-wet (FACW)–usually occurs in wetlands, but may occur in non-wetlands • Facultative (FAC)–occurs in wetlands and non-wetlands • Facultative-upland (FACU)–usually occurs in non-wetlands, but may occur in wetlands • Upland (UPL)–almost never occurs in wetlands
• Not listed (NL)–scored as an upland plant and calculated as such on wetland determination data forms
Hydric soils are those formed under saturated conditions, flooding, or ponding long enough during the growing season to develop anaerobic conditions in the upper part of the soil profile (USDA, 2018).

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 8 Wetland hydrology is demonstrated through direct evidence (primary indicators) or indirect evidence (secondary indicators) of flooding, ponding, or saturation for a significant portion of the growing season (USACE, 2010).

Prior to conducting the field investigation, SHN staff reviewed the USGS topographic quadrangle map (Figure 1); Google Earth (Google Earth, 2023); USDA-NRCS Web Soil Survey website (USDA, 2023b; Appendix 2); and NWI map (USFWS, 2023b; Appendix 2). Prior to the TP investigation, a preliminary site investigation was performed to assess site conditions. During the subsequent TP subsurface investigation, sample points were characterized at each pit for the aforementioned botanical, hydrologic, and soil parameters.

Wetland TP locations were selected to:
• achieve appropriate coverage and characterization of wetland and upland habitats, • document potential changes in the vegetative community (such as, a shift in the dominant species), and
• determine the approximate boundary line between wetlands and uplands by evaluating the extent of key wetland criteria (hydrology, hydric soils, and hydrophytic vegetation).

All field mapping was completed with a Trimble DA2 sub-meter Global Positioning System (GPS) unit with Samsung Tablet interface.

2.2.1 Wetland Delineation Vegetation Methods
Site investigations were performed during a “normal” rainfall period for the April 20, 2023 site visit by reviewing rainfall data (see Section 1.4 Site Hydrology, Table 3). Absolute percent cover of each plant species was visually estimated within the sample point and within each vegetation stratum. The tree stratum was inspected at a 30-foot radius centered on the sample point, and the herb and sapling/shrub strata at a 5-foot radius. Botanical nomenclature follows the methods described in Section 2.1 Botanical and ESHA Survey Methods.

The 50/20 method
2 was applied to each stratum to determine the dominant plant species and to satisfy the hydrophytic vegetation criteria. If hydric soils and wetland hydrology were present, the prevalence index3 was applied. The occurrence and type of plant cover determine whether jurisdictional areas are identified as satisfying the vegetation criteria of a wetland or other waters. Those sites with little or no hydrophytic plant cover, or other sites not capable of supporting hydrophytic plant communities in normal circumstances, are identified as wetlands if other wetland parameters are present, or other waters provided they have an OHWM.
2 The 50/20 rule: for each stratum of the plant community, dominant species are the most abundant species that (when ranked in descending order of abundance and cumulatively totaled) immediately exceed 50% of total dominance measure for the stratum, plus any additional species that individually comprise 20% or more of the total dominance measure for the stratum (USACE, 2010).
3 The prevalence index is a weighted-average wetland indicator status of all plant species in the sampling plot or other sampling unit, where each indicator status category is given a numeric code (OBL = 1, FACW = 2, FAC = 3, FACU = 4, and UPL = 5) and weighting is by abundance (absolute percent cover).

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 9 2.2.2 Soils Methods
Soils were field verified for the presence or absence of hydric conditions. All TPs were dug to a minimum depth of 24 inches (if feasible), and the thickness of each soil horizon was measured. The Munsell Soil Color Chart (Munsell Color, 2010) was referenced to determine the colors of the moist soil matrix and redoximorphic (redox) features (if present). Soils were closely inspected for hydric soil indicators, as defined by the NRCS “Field Indicators of Hydric Soils in the United States” (USDA-NRCS, 2018). TPs were excavated to ascertain the presence or absence of hydric soils within the study area, and any potential wetland boundaries.

2.2.3 Hydrology Methods
Wetland hydrology observations were made during TP excavations on April 20, 2023. This included the presence or absence of standing water, soil saturation, and a water table, in addition to indirect hydrologic indicators (such as, water marks, drift deposits, sediment deposits, alpha-alpha dipyridyl, drainage patterns, geomorphic position, water-stained leaves, and similar features). Indicators of extended periods of saturation would include oxidized rhizospheres surrounding living roots or the presence of reduced iron or sulfur in the soil profile. A TP must contain at least one primary indicator or two secondary indicators to qualify for the hydrology parameter. Wetland hydrology observations were made during a normal rainfall period.

2.2.4 Ordinary High Water Mark Methods
For purposes of Section 404 of the Clean Water Act (CWA), the lateral limits of federal jurisdiction over non-tidal water bodies in the absence of adjacent wetlands extend to the OHWM. When adjacent wetlands are present with a continuous aboveground connection, CWA jurisdiction extends beyond the OHWM to the limits of the adjacent wetlands. For purposes of Sections 9 and 10 of the Rivers and Harbors Act of 1899, the lateral extent of federal jurisdiction, which is limited to the traditional navigable waters of the United States, extends to the OHWM, whether or not adjacent wetlands extend landward of the OHWM (USACE, 2014).

USACE regulations define the term OHWM for the purposes of the CWA lateral jurisdiction as follows:
“The term “ordinary high water mark” means 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 terrestrial vegetation, the presence of litter and debris, or other appropriate means that consider the characteristics of the surrounding areas at 33 CFR 328.3(e).”
The OHWM in streams corresponds with the boundaries of the active channel, which are typically expressed by some combination of three primary indicators: a topographic break in slope, change in sediment characteristics, and change in vegetation characteristics (USACE, 2014). The following supporting features should be considered when making an OHWM determination, to the extent that they can be identified and are deemed reasonably reliable (USACE, 2014):
• Drift/wrack
• Erosion/scour
• Litter removal
• Silt deposits

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 10 • Bank undercutting
• Root exposure
• Point bars
• Water staining
• Shelving
• Headcut/knickpoint
• Macroinvertebrates

3.0 Results

3.1 Special-status Botanical Species
During the biological scoping process, a total of 57 special-status botanical species were identified as occurring within the Point Arena and surrounding USGS quadrangles. A total of twenty-one (21) specialstatus botanical species were determined to have a moderate or high potential of occurring within the study area. Special-status species with moderate or high potential of occurring within the study area are listed below:
o Astragalus rattanii var. rattannii (Rattan’s milk vetch) o Calystegia purpurata ssp. saxicola (coastal bluff morning glory) o Ceanothus gloriosus var. exaltatus (glory brush)
o Ceanothus gloriosus var. gloriosus (Point Reyes ceanothus) o Erigeron supplex (supple daisy)
o Erysimum concinnum (bluff wallflower)
o Fritillaria roderickii (Roderick’s fritillary)
o Gilia capitata ssp. pacifica (Pacific gilia)
o Glyceria grandis (American manna grass)
o Hesperevax sparsiflora var. breviflora (short-leaved evax) o Horkelia marinensis (Pt. Reyes horkelia)
o Hosackia gracilis (harlequin lotus)
o Lasthenia californica ssp. macrantha (perennial goldfields) o Lilium maritmum (coast lily)
o Oenothera wolfii (Wolf’s evening primrose)
o Perideridia gairdneri ssp. gairdneri (Gairdner’s yampah) o Sidalcea malachroides (maple-leaved checkerbloom)
o Sidalcea malviflora ssp. purpurea (purple-stemmed checkerbloom)

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 11 o Sulcaria spiralifera (twisted horsehair lichen)
o Trifolium amoenum (showy Indian clover)
o Trifolium buckwestiorum (Santa Cruz clover)
All special-status species reported from the Point Arena and surrounding quadrangles were searched for, however the species with moderate or high potential for occurrence were specifically searched for during the surveys. Only one botanical survey was conducted. As such, it is possible that later blooming species may have been missed on account of the single survey in April.

Three plant species observed during the April survey could only be determined to genus due to a lack of diagnostic features present, as the plants were in a vegetative state. These included two species in the Lupinus genus and one in the Horkelia genus (see Appendix 3 Table 2 for a complete list of botanical species observed). One special-status Horkelia species was found to have a moderate or high potential to occur within this region, therefore a follow-up late-season survey prior to construction is needed to verify the species observed. The location of the Horkelia is shown on Figure 2, so that during planning, the area will be avoided, in the case that it is determined to be a sensitive species. While no specialstatus species were definitively observed during surveys, marginal suitable habitat does exist within the study area for several special-status species. The vegetation within much of the study area experiences regular disturbance from mowing, weed whacking, and associated roadside maintenance activities. High cover by non-native species occurs throughout the study area and further reduces the likelihood of special-status species occurrences. Additional habitat for special-status species exists in less disturbed areas outside of the study area and it is likely that these areas are occupied by special-status species. In particular, the area around Point Arena Creek contains suitable riparian habitat for many special-status species. This area will not be impacted by the proposed project.

3.2 Environmentally Sensitive Habitat Areas
ESHA is defined in the California Coastal Act as "any area in which plant or animal life or their habitats are either rare or especially valuable because of their special nature or role in an ecosystem and which could be easily disturbed or degraded by human activities and developments”. Within the project area, this includes wetlands and other waters, sensitive vegetation communities and PAMB habitat. Sensitive vegetation communities occurring within the study area are described in detail below.

3.2.1 Sensitive Natural Communities
Sensitive vegetation communities, with a rank of S3 or lower, require California Environmental Quality Act (CEQA) analysis if potential impacts may occur because of the proposed project and are considered ESHA by the CCC. One sensitive vegetation community, a shining willow grove (Salix lucida ssp. lasiandra Forest & Woodland Alliance), was observed along the southwestern boundary of the study area along Point Arena Creek. This vegetation alliance has a global heritage rank of G3/G4 and a state rank of S3.2, as defined by the Manual of California Vegetation and subsequent online revisions or CDFW Natural Communities list (Sawyer, 2009; CNPS 2023; CDFW, 2019; Figure 2). This riparian woodland was dominated by shining willow (Salix lasiandra var. lasiandra) with 45 percent cover, and Sitka willow (Salix sitchensis) with 35 percent cover in the tree stratum, California blackberry with 15 percent cover, and red elderberry (Sambucus racemosa var. racemosa) with 10 percent cover in the shrub stratum, and common nettle (Urtica dioica) with 50 percent cover, and sword fern (Polystichum munitum) with 15 percent cover in the herbaceous stratum (see Appendix 1, Photos 4 and 5). Shining

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 12 willow dominance varies along the Point Arena Creek with coast willow (Salix hookeriana) and Sitka willow co-dominants.

No other natural communities were observed within the study area. The majority of the study area is developed and does not support sensitive vegetation communities.

3.3 Wetland Results and Discussion

3.3.1 Three-parameter wetlands
Two isolated wetland features meeting the three-parameter wetland definition were observed within the study area off SR 1. These features were isolated and do not have aboveground connectivity to a Traditional Navigable Waterway (TNW) and therefore may not be federally jurisdictional wetlands given the 2023 Sackett Supreme Court ruling. These wetlands are still California State jurisdictional wetlands as defined by the California State Waterboard and California Coastal Act (CCA).

A three-parameter wetland feature was observed south of SR 1 at TP4 within a roadside drainage ditch (Figure 2; Appendix 1, Photos 6 and 7). Very little vegetation was present within the wetland, reflecting regular flooding and dense shade from planted Monterey cypress trees along the road. Soils were completely saturated at the time of inspection and best professional judgment was used to determine hydric soil conditions within this feature (see Appendix 4, TP4 for more information). This wetland totaled approximately 719 square feet (SF). The wetland was artificially induced for the drainage of stormwater from SR 1 and wetland habitat is marginal due to the proximity to the roadway and lack of herbaceous vegetation.

Another three-parameter wetland was observed just outside of the study area west of SR 1 near commercial downtown Point Arena. This feature was located on private property and could not be accessed to verify that three parameters were present, but dominance by hydrophytic vegetation, standing water, aquatic invertebrates, and algal mats suggest all three wetland parameters and wetland habitat conditions are present. This feature occurs directly adjacent to the proposed project; it is assumed to be a three-parameter feature and associated buffers and/or protection measures should be implemented (see Section 5.0 Recommendations).

3.3.2 CCC wetlands
A single two-parameter feature meeting the CCC wetland definition occurs off Iverson Avenue at TP2 within a single continuous roadside swale connected by a culvert (Figure 2; Appendix 1 Photos 8 and 9).

A drainage inlet (DI) adjacent to the feature collects stormwater from the north side of Iverson Avenue and directs it into wetlands on the south side of Iverson Avenue. The total area of the coastal wetland covered approximately 1,332 SF. Dominant species included pennyroyal (Mentha pulegium), tall flatsedge (Cyperus eragrostis), and English plantain (Plantago lanceolata). Non-native planted landscape vegetation were also present within the area, but were not included in hydrophytic vegetationdominance calculations because they do not reflect wetland conditions. Wetland hydrology indicators were observed, but no hydric soils were present. The coastal wetland was artificially induced for the drainage of stormwater from Iverson Avenue and wetland habitat is marginal due to the proximity to the roadway, non-native species dominance, and lack of standing water due to artificial drainage. This feature likely represents stormwater input from Iverson Avenue but may be a relictual portion of those wetlands separated from the main body of the wetland by Iverson Avenue.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 13 3.3.3 Upland Area
The majority of the study area had no wetland parameters present and is considered upland as represented at TP 1, TP3, and TP5 (Figure 2; Appendix 1). The majority of the study area was roadside, and thus regularly maintained by mowing, weed whacking, or other associated roadside maintenance methods.

TP1 was excavated in a roadside swale within a low point, but wetland conditions were not observed.

Dominant species within this upland area included slender wild oat (Avena barbata), coast willow, and coast redwood (Sequoia sempervirens). The presence of willows, typically associated with wet conditions, may represent historical conditions or deep hydrology.

TP3 was excavated just east of the roadside swale wetland conditions represented by TP2. This area was characterized by coast redwood, creeping bentgrass, and Italian ryegrass (Festuca perennis). This area was determined to be transitional, as vegetation was dominated by weakly hydrophytic non-native vegetation, which were not acting as hydrophytes at this location. Both hydric soils and hydrologic indicators were not present.

TP5 was excavated within an elevated area above the wetland roadside ditch represented by TP4.

Dominant species included Monterey cypress and greater quaking grass (Briza maxima). This area was well drained and no wetland conditions were observed.

Table 4 summarizes the type, location, and description of the TPs. Results from the field work completed on April 20, 2023 are recorded on the Wetland Determination Data Forms located in Appendix 4. See Figure 2 for TP locations and Appendix 1 for photos of the study area.

3.3.4 Ordinary High Water Mark
OHWM indicators were observed within Point Arena Creek, which runs along the southwestern boundary of the study area adjacent to the WWTF (Figure 2; Appendix 1, Photos 11 and 12). An OHWM point was delineated and the datasheet for this location (OHWM1) is included in Appendix 4. This OHWM is associated with a perennial channel (Point Arena Creek) and is characterized by dense willow and herbaceous vegetation along clay and silt banks above a gravelly stream bottom.

4.0 Conclusions
No special-status botanical species were definitively observed within the study area. However, a lateseason botanical survey is necessary to confirm the species of Horkelia that was observed, as it is possibly a special-status species. ESHA occurs in several areas within the study area represented by a shining willow grove sensitive vegetation community, one three-parameter wetland feature, and one coastal wetland feature, as well as a three-parameter wetland feature immediately outside of the study area (Figure 2). The three-parameter wetland occupies a total of 719 SF, and the coastal wetland feature occupies 1,332 SF within the study area (see Figure 2). In addition, the boundary of the wetland on private property west of the study area off SR 1 was estimated based on the topography and vegetation (Figure 2). Finally, an OHWM was delineated along Point Arena Creek just southwest of the study area boundary.

The project proposes upgrades to the existing WWTF as well as excavation along roadways with associated heavy equipment staging along roadsides, and therefore has potential to impact sensitive vegetation communities and wetlands. In accordance with the Point Arena General Plan/Local Coastal

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 14 Plan, a buffer area of 100 feet should be established where feasible around the shining willow grove, the three-parameter wetlands, and the California coastal wetland feature “to serve as transitional habitat and provide distance and physical barriers to human intrusion,” (City of Point Arena, 1995, Rev. 2006; Figure 2).

The current development footprint at the WWTF includes two buildings, a paved driveway and parking lot, two wastewater storage ponds, and a chain-link fence boundary. Several of these features are within the 100-foot buffer of the shining willow grove sensitive vegetation community and Point Arena Creek. The project has been designed to minimize impacts to environmentally sensitive habitat areas occurring within the study area by siting improvements to remain within the existing development footprint. Therefore, no long-term impacts are anticipated and any short-term impacts that could occur during construction will be minimized by following Best Management Practices (BMPs) outlined in Section 5.0.

The proposed sewer line improvements will occur along established paved roadways within 100 ft of three-parameter and coastal wetland features. To ensure sensitive resources are avoided, SHN recommends all construction activities within and adjacent to sensitive resources (such as, within 100-ft buffer zones) be restricted to roadways. Any off-road areas that will be utilized for additional excavations or as vehicle and equipment staging areas should occur outside of all 100-ft buffer areas (see Figure 2). Additional measures to prevent impacts are included in Section 5.0 Avoidance and Minimization Measures below.

In compliance with the City of Point Arena Municipal Code section 18.25.220, the current siting and design of the Sanitary Collections System Improvement Project is intended to prevent significant impacts to the habitat values, functional capacity, and species diversity of sensitive natural communities (including California Coastal wetlands) and to be compatible with the continuance of these habitats. Soil disturbance and vegetation removal will not be conducted within sensitive vegetation communities and all wetlands and suitable BMPs will be utilized within the 100-ft buffer.

Every effort was taken to conduct the wetland delineation and early-season botanical survey during the optimal floristic window to enhance detection of special-status species and aid in proper identification of species present within the study area; however, only one survey was conducted, and it is possible that later blooming species were not detected. Results in this report do represent conditions at the time of field work and therefore some species (such as, Horkelia and Lupinus ssp.; see Appendix 3, Table 2) could not be identified at the time of the survey. In addition, it is possible that other botanical species were not detected. This can result from years of dormancy resulting from sub-optimal conditions, lack of proper germinating conditions, and early dehiscence. However, the historical and ongoing use and maintenance of the area make it unlikely that additional special-status species will occur within the study area prior to project implementation. SHN recommends a late-season botanical survey be conducted to determine the species of the aforementioned unidentified plants, as discussed in Section

5.0 Avoidance and Minimization Measures.

With the incorporation of the BMPs and Avoidance and Minimization Measures included herein, in addition to any Conditions of Approval deemed necessary by the City of Point Arena, it is unlikely that project activities will significantly impact resources present within and adjacent to the study area.

Table 4 describes the number and type of parameters for each TP and Table 5 describes the wetland areas occurring within the study area.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 15 Table 4. TP Results, April 2023
Point Arena Sanitary Collections System Improvement Project City of Point Arena, CA
TP Number
Parameters
Met
Parameter Type Onsite Location Jurisdiction
TP1 0 N/Aa
Roadside swale north of
Iverson Avenue None
TP2 2
Hydrophytic vegetation and
wetland hydrology
Roadside swale north of
Iverson Avenue, east of
TP1.

CCCb
TP3 0 N/A
Roadside swale north of
Iverson Avenue, east of TP2
and associated feature.

None
TP4 3
Hydrophytic vegetation, hydric
soils, and wetland hydrology
Roadside ditch south of
SR 1.

USACEc,
CCC
TP5 0 N/A
Just west of, and elevated
above, the roadside ditch
represented by TP 4, south
of SR 1.

None
a N/A: Not applicable
b CCC: California Coastal Commission
c USACE: United States Army Corps of Engineers
Table 5. Wetland Delineation Results, April 2023
Point Arena Sanitary Collections System Improvement Project City of Point Arena, CA
Wetland and
Other Waters
Area
Test
Pits/Transect
Cowardin Type
Centerpoint
(within study area)
Latitude/Longitude
Approximate
Area within
study area
(square feet)
Threeparameter
wetland
TP4 PFO4Cx0n
a 38.912077°/-123.695047° 719
Twoparameter
feature
TP2 N/A 38.907847°/-123.693972° 1,332
Upland TP1, TP3, TP5 N/A

38.908016°/-123.694898°

38.907778°/-123.693610°

38.912092°/-123.695116°
Remaining
Areas
a Palustrine forested needle-leaved evergreen, seasonally flooded, excavated, freshwater wetland with mineral soils.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 16 5.0 Recommended Avoidance and Minimization
Measures
The following construction BMPs and Avoidance and Minimization Measures should be implemented prior to and/or during construction:

Late-season botanical survey
• A qualified biologist shall conduct a late-season botanical survey preferably over the entire study area. The minimum area to be surveyed shall include locations where the unidentified Horkelia species had been observed (see Figure 2), to verify whether a special-status botanical species is present at the site.
• A brief memorandum shall be submitted providing the results of the late-season survey and any additional recommendations, if applicable.

WWTF improvements:
• Temporary fencing and sediment and/or erosion control barriers (such as, silt fence, fiber rolls, etc.) shall be placed between the construction boundaries and the sensitive biological resources (shining willow grove sensitive vegetation community and Point Arena Creek). Appropriate barriers shall be utilized based on substrate and slope, and a combination of barriers may be prudent. Fencing placement will ensure the maximum buffer possible between construction activities and sensitive resources.

Sewer main repairs and replacements along existing roadways • Install temporary construction fencing between the wetlands within the roadside drainages and the project-related disturbance to minimize the risk of accidental encroachment or impact. • Any off-road activities, including excavation and equipment staging areas, shall be clearly delineated outside of the 100-ft buffer zones from all sensitive resources identified along the roadways (such as, USACE and California Coastal wetlands). • When excavation is to occur within 100 ft of sensitive resources, it shall stay within the established roadway. In addition, appropriate temporary sediment control measures shall be implemented to prevent any impacts to such resources during construction activities.

Additional general measures
• Show temporary construction fencing locations on all construction documents and plans. • Include a ‘Do Not Disturb’ area within the buffer area surrounding sensitive resources on all construction-related documents.
• Have a qualified biologist flag or stake the location of the temporary fencing to ensure correct placement.
• Minimize vegetation removal during project implementation. In areas where soil disturbance and vegetation removal is inevitable, use only native species to revegetate. This includes erosion control seed mixes.
• Utilize seed-free straw as ground cover to minimize erosion potential and non-native species introduction following project completion.
• Limit ground disturbance to the extent necessary to accomplish project goals.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 17 • No work will be conducted during rain events.
• Collect and dispose of spoils from excavations at an appropriately permitted upland disposal facility if required to leave the site. If spoils are to be temporarily stockpiled onsite, they must be covered and secured prior to the onset of precipitation. • All trash shall be removed from the work site and disposed of on a regular basis. • All equipment used during construction shall be monitored for oil and fuel leaks at all times. • Fully implement all conditions of approval required by permit terms.

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The Calflora Database. Accessed March and July 2022 at: http://www.calflora.org/.

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Accessed May 2023 at: https://maps.conservation.ca.gov/cgs/gmc/ California Department of Fish and Wildlife. (2018). Protocols for Surveying and Evaluating Impacts to Special-status Native Plant Populations and Natural Communities. Sacramento, CA:CDFW. ---. (2019). CDFW-CNPS Protocol for the Combined Vegetation Rapid Assessment and Releve’ Form.

Sacramento, CA:CDFW.
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https://wildlife.ca.gov/Data/VegCAMP/Natural-Communities.

California Native Plant Society. (2023a). A Manual of California Vegetation Online. Accessed May 2023 at:
https://vegetation.cnps.org.
---. (2023b). Inventory of Rare and Endangered Plants of California (online edition, v8-03 0.45).

Accessed May 2023 at: http://www.rareplants.cnps.org.

City of Point Arena. (1995; Rev. 2006). General Plan/Local Coastal Plan. Point Arena, CA.

Environmental Laboratory. (1987). Corps of Engineers Wetland Delineation Manual. Technical Report Y87-1. Vicksburg, MS:USACE Waterways Experiment Station.

Google Earth. (2023), Mendocino County, California. 38.914193° and -123.709156°. Accessed March and July 2022. NR: Google Earth.

Munsell Color (Firm). (2010). Munsell Soil Color Charts: with Genuine Munsell Color Chips. Grand Rapids, MI:Munsell Color.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231031-BioWetlandRpt.doc 18 National Oceanic and Atmospheric Administration (NOAA). (2023). National Weather Service. NOAA Online Weather Data. Accessed May, 2023 at: https://www.weather.gov/wrh/Climate?wfo=eka.

Sawyer, G. O., T. Keeler-Wolf, and J. Evans. (2009). A Manual of California Vegetation, Second Edition.

Sacramento, CA:CNPS Press.

U.S. Army Corps of Engineers (USACE). (2010). Regional Supplement to the Corps of Engineers Wetland Delineation Manual: Western Mountain, Valleys, and Coast Region, J.S. Wakeley, R.W. Lichvar, and C.V. Noble (eds) ERDC/EL TR-08-03. Vicksburg, MS: USACE Research and Development Center.
---. (2014). A Guide to Ordinary High Water Mark (OHWM) Delineation for Non-Perennial Streams in the Western Mountains, Valleys, and Coast Region of the United States, M. K. Mersel and R. W.

Lichvar (eds) ERDC/CRREL TR-14-13. Vicksburg, MS: USACE Research and Development Center. ---. (2020). Western Mountains, Valleys, and Coast: 2020 Regional Wetland Plant List, Lichvar, R.W., D.L.

Banks, W.N. Kirchner, and N.C. Melvin (eds), ERDC/CRREL. Vicksburg, MS: USACE Research and Development Center.

U.S. Department of Agriculture, Natural Resources Conservation Service. (2018). Field Indicators of Hydric Soils in the United States, Version 8.2. G.W. Hurt, L.M. Vasilas (eds.). NR: USDA, NRCS in cooperation with the National Technical Committee for Hydric Soils. ---. (2023a). Web Soil Survey. Accessed May 2023 at:
https://websoilsurvey.nrcs.usda.gov/app/WebSoilSurvey.aspx. ---. (2023b). WETS Database. Ft. Bragg, CA Weather Station. Accessed May 2023 at: https://agacis.rccacis.org/?fips=06045.

United States Fish & Wildlife Service. (2023a). “IPaC Trust Resources Report”. Accessed May 2023 at:
https://ecos.fws.gov/ipac/.
---. (2023b). National Wetlands Inventory. Accessed May 2023 at:
http://www.fws.gov/wetlands/data/mapper.HTML/.

United States Geological Survey. (2015). USGS U.S. Topo 7.5-minute map for Point Arena, CA. 2015:USGS – National Geospatial Technical Operations Center (NGTOC). NR:USGS.

Site Photos 1
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix1_Photos.docx 1 Photo 1. Downtown Point Arena on SR 1 looking north. Conditions are typical for much of the study area in the City. Photo taken April 20, 2023.

Photo 2. Grassland and wetland south of the study area bordering Iverson Rd in Point Arena. Photo taken April 20, 2023.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix1_Photos.docx 2 Photo 3. Dense herbaceous vegetation, including several non-native and invasive species off CA Highway 1 in Point Arena looking west from TP5 (upland). Photo taken April 20, 2023.

Photo 4. Shining willow grove sensitive vegetation community along Point Arena Creek, looking west (downstream). Note dense willow cover and understory. Photo taken April 20, 2023.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix1_Photos.docx 3 Photo 5. Riparian vegetation community along Point Arena Creek, looking east (upstream). Note willows have not fully leafed out behind the red elderberry understory. Photo taken April 20, 2023.

Photo 6. Three-parameter wetland feature located in a drainage ditch off of SR 1 in Point Arena, looking east. Note minimal vegetation within the wetland. Photo taken April 20, 2023.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix1_Photos.docx 4 Photo 7. TP4 within three-parameter wetland feature in the drainage ditch off SR 1, looking west. Photo taken April 20, 2023.

Photo 8. Two-parameter wetland feature located north of Iverson Road, Point Arena, looking northwest.

Note mowed conditions and non-native hedge. Photo taken April 20, 2023.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix1_Photos.docx 5 Photo 9. TP2 located within two-parameter wetland feature north of Iverson Road in Point Arena. Photo taken April 20, 2023.

Photo 10. TP3 located east of the two-parameter wetland described at TP2. This area was determined to be upland. Note developed residential conditions, and mowed nature of the vegetation. Photo taken April 20, 2023.

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix1_Photos.docx 6 Photo 11. Point Arena Creek and approximate location of Ordinary High Water Mark looking upstream (east). Photo taken April 20, 2023.

Photo 12. Point Arena Creek and approximate location of Ordinary High Water Mark looking downstream (west). Photo taken April 20, 2023.

Soil Map and
National Wetlands
Inventory 2
United States
Department of
Agriculture
A product of the National
Cooperative Soil Survey,
a joint effort of the United
States Department of
Agriculture and other
Federal agencies, State
agencies including the
Agricultural Experiment
Stations, and local
participants
Custom Soil Resource
Report for
Mendocino County,
Western Part,
California
Point Arena SCS Improvement
Project
Natural
Resources
Conservation
Service
May 1, 2023
Preface
Soil surveys contain information that affects land use planning in survey areas.

They highlight soil limitations that affect various land uses and provide information about the properties of the soils in the survey areas. Soil surveys are designed for many different users, including farmers, ranchers, foresters, agronomists, urban planners, community officials, engineers, developers, builders, and home buyers.

Also, conservationists, teachers, students, and specialists in recreation, waste disposal, and pollution control can use the surveys to help them understand, protect, or enhance the environment.

Various land use regulations of Federal, State, and local governments may impose special restrictions on land use or land treatment. Soil surveys identify soil properties that are used in making various land use or land treatment decisions.

The information is intended to help the land users identify and reduce the effects of soil limitations on various land uses. The landowner or user is responsible for identifying and complying with existing laws and regulations.

Although soil survey information can be used for general farm, local, and wider area planning, onsite investigation is needed to supplement this information in some cases. Examples include soil quality assessments (http://www.nrcs.usda.gov/wps/ portal/nrcs/main/soils/health/) and certain conservation and engineering applications. For more detailed information, contact your local USDA Service Center (https://offices.sc.egov.usda.gov/locator/app?agency=nrcs) or your NRCS State Soil Scientist (http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/contactus/? cid=nrcs142p2_053951).

Great differences in soil properties can occur within short distances. Some soils are seasonally wet or subject to flooding. Some are too unstable to be used as a foundation for buildings or roads. Clayey or wet soils are poorly suited to use as septic tank absorption fields. A high water table makes a soil poorly suited to basements or underground installations.

The National Cooperative Soil Survey is a joint effort of the United States Department of Agriculture and other Federal agencies, State agencies including the Agricultural Experiment Stations, and local agencies. The Natural Resources Conservation Service (NRCS) has leadership for the Federal part of the National Cooperative Soil Survey.

Information about soils is updated periodically. Updated information is available through the NRCS Web Soil Survey, the site for official soil survey information.

The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or a part of an individual's income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require 2 alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA's TARGET Center at (202) 720-2600 (voice and TDD). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, S.W., Washington, D.C. 20250-9410 or call (800) 795-3272 (voice) or (202) 720-6382 (TDD). USDA is an equal opportunity provider and employer.
3 Contents
Preface....................................................................................................................2 How Soil Surveys Are Made..................................................................................5 Soil Map.................................................................................................................. 8 Soil Map................................................................................................................9 Legend................................................................................................................10 Map Unit Legend................................................................................................ 11 Map Unit Descriptions.........................................................................................11 Mendocino County, Western Part, California..................................................13 106—Biaggi loam, 5 to 15 percent slopes...................................................13 139—Dystropepts, 30 to 75 percent slopes................................................14 183—Mallopass loam, 5 to 15 percent slopes............................................ 15 219—Urban land.........................................................................................17 References............................................................................................................19 4 How Soil Surveys Are Made
Soil surveys are made to provide information about the soils and miscellaneous areas in a specific area. They include a description of the soils and miscellaneous areas and their location on the landscape and tables that show soil properties and limitations affecting various uses. Soil scientists observed the steepness, length, and shape of the slopes; the general pattern of drainage; the kinds of crops and native plants; and the kinds of bedrock. They observed and described many soil profiles. A soil profile is the sequence of natural layers, or horizons, in a soil. The profile extends from the surface down into the unconsolidated material in which the soil formed or from the surface down to bedrock. The unconsolidated material is devoid of roots and other living organisms and has not been changed by other biological activity.

Currently, soils are mapped according to the boundaries of major land resource areas (MLRAs). MLRAs are geographically associated land resource units that share common characteristics related to physiography, geology, climate, water resources, soils, biological resources, and land uses (USDA, 2006). Soil survey areas typically consist of parts of one or more MLRA.

The soils and miscellaneous areas in a survey area occur in an orderly pattern that is related to the geology, landforms, relief, climate, and natural vegetation of the area. Each kind of soil and miscellaneous area is associated with a particular kind of landform or with a segment of the landform. By observing the soils and miscellaneous areas in the survey area and relating their position to specific segments of the landform, a soil scientist develops a concept, or model, of how they were formed. Thus, during mapping, this model enables the soil scientist to predict with a considerable degree of accuracy the kind of soil or miscellaneous area at a specific location on the landscape.

Commonly, individual soils on the landscape merge into one another as their characteristics gradually change. To construct an accurate soil map, however, soil scientists must determine the boundaries between the soils. They can observe only a limited number of soil profiles. Nevertheless, these observations, supplemented by an understanding of the soil-vegetation-landscape relationship, are sufficient to verify predictions of the kinds of soil in an area and to determine the boundaries.

Soil scientists recorded the characteristics of the soil profiles that they studied. They noted soil color, texture, size and shape of soil aggregates, kind and amount of rock fragments, distribution of plant roots, reaction, and other features that enable them to identify soils. After describing the soils in the survey area and determining their properties, the soil scientists assigned the soils to taxonomic classes (units).

Taxonomic classes are concepts. Each taxonomic class has a set of soil characteristics with precisely defined limits. The classes are used as a basis for comparison to classify soils systematically. Soil taxonomy, the system of taxonomic classification used in the United States, is based mainly on the kind and character of soil properties and the arrangement of horizons within the profile. After the soil 5 scientists classified and named the soils in the survey area, they compared the individual soils with similar soils in the same taxonomic class in other areas so that they could confirm data and assemble additional data based on experience and research.

The objective of soil mapping is not to delineate pure map unit components; the objective is to separate the landscape into landforms or landform segments that have similar use and management requirements. Each map unit is defined by a unique combination of soil components and/or miscellaneous areas in predictable proportions. Some components may be highly contrasting to the other components of the map unit. The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The delineation of such landforms and landform segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, onsite investigation is needed to define and locate the soils and miscellaneous areas.

Soil scientists make many field observations in the process of producing a soil map.

The frequency of observation is dependent upon several factors, including scale of mapping, intensity of mapping, design of map units, complexity of the landscape, and experience of the soil scientist. Observations are made to test and refine the soil-landscape model and predictions and to verify the classification of the soils at specific locations. Once the soil-landscape model is refined, a significantly smaller number of measurements of individual soil properties are made and recorded.

These measurements may include field measurements, such as those for color, depth to bedrock, and texture, and laboratory measurements, such as those for content of sand, silt, clay, salt, and other components. Properties of each soil typically vary from one point to another across the landscape.

Observations for map unit components are aggregated to develop ranges of characteristics for the components. The aggregated values are presented. Direct measurements do not exist for every property presented for every map unit component. Values for some properties are estimated from combinations of other properties.

While a soil survey is in progress, samples of some of the soils in the area generally are collected for laboratory analyses and for engineering tests. Soil scientists interpret the data from these analyses and tests as well as the field-observed characteristics and the soil properties to determine the expected behavior of the soils under different uses. Interpretations for all of the soils are field tested through observation of the soils in different uses and under different levels of management.

Some interpretations are modified to fit local conditions, and some new interpretations are developed to meet local needs. Data are assembled from other sources, such as research information, production records, and field experience of specialists. For example, data on crop yields under defined levels of management are assembled from farm records and from field or plot experiments on the same kinds of soil.

Predictions about soil behavior are based not only on soil properties but also on such variables as climate and biological activity. Soil conditions are predictable over long periods of time, but they are not predictable from year to year. For example, soil scientists can predict with a fairly high degree of accuracy that a given soil will have a high water table within certain depths in most years, but they cannot predict that a high water table will always be at a specific level in the soil on a specific date.

After soil scientists located and identified the significant natural bodies of soil in the survey area, they drew the boundaries of these bodies on aerial photographs and Custom Soil Resource Report
6 identified each as a specific map unit. Aerial photographs show trees, buildings, fields, roads, and rivers, all of which help in locating boundaries accurately.

Custom Soil Resource Report
7 Soil Map
The soil map section includes the soil map for the defined area of interest, a list of soil map units on the map and extent of each map unit, and cartographic symbols displayed on the map. Also presented are various metadata about data used to produce the map, and a description of each soil map unit. 8 9
Custom Soil Resource Report
Soil Map
4306700 4306800 4306900 4307000 4307100 4307200 4307300 4307400 4307500 4307600 4306700 4306800 4306900 4307000 4307100 4307200 4307300 4307400 4307500 4307600 439000 439100 439200 439300 439400 439500 439600 439700 439800 439900 440000 440100 440200 440300 440400 439000 439100 439200 439300 439400 439500 439600 439700 439800 439900 440000 440100 440200 440300 440400 38° 54' 55'' N
123° 42' 14'' W
38° 54' 55'' N
123° 41' 12'' W
38° 54' 23'' N
123° 42' 14'' W
38° 54' 23'' N
123° 41' 12'' W
N
Map projection: Web Mercator Corner coordinates: WGS84 Edge tics: UTM Zone 10N WGS84 0 300 600 1200 1800
Feet
0 100 200 400 600
Meters
Map Scale: 1:6,870 if printed on A landscape (11" x 8.5") sheet.

Soil Map may not be valid at this scale.

MAP LEGEND MAP INFORMATION
Area of Interest (AOI)
Area of Interest (AOI)
Soils
Soil Map Unit Polygons
Soil Map Unit Lines
Soil Map Unit Points
Special Point Features
Blowout
Borrow Pit
Clay Spot
Closed Depression
Gravel Pit
Gravelly Spot
Landfill
Lava Flow
Marsh or swamp
Mine or Quarry
Miscellaneous Water
Perennial Water
Rock Outcrop
Saline Spot
Sandy Spot
Severely Eroded Spot
Sinkhole
Slide or Slip
Sodic Spot
Spoil Area
Stony Spot
Very Stony Spot
Wet Spot
Other
Special Line Features
Water Features
Streams and Canals
Transportation
Rails
Interstate Highways
US Routes
Major Roads
Local Roads
Background
Aerial Photography
The soil surveys that comprise your AOI were mapped at
1:24,000.

Warning: Soil Map may not be valid at this scale.

Enlargement of maps beyond the scale of mapping can cause misunderstanding of the detail of mapping and accuracy of soil line placement. The maps do not show the small areas of contrasting soils that could have been shown at a more detailed scale.

Please rely on the bar scale on each map sheet for map
measurements.

Source of Map: Natural Resources Conservation Service
Web Soil Survey URL:

Coordinate System: Web Mercator (EPSG:3857)
Maps from the Web Soil Survey are based on the Web Mercator projection, which preserves direction and shape but distorts distance and area. A projection that preserves area, such as the Albers equal-area conic projection, should be used if more accurate calculations of distance or area are required.

This product is generated from the USDA-NRCS certified data as of the version date(s) listed below.

Soil Survey Area: Mendocino County, Western Part, California Survey Area Data: Version 18, Sep 7, 2022
Soil map units are labeled (as space allows) for map scales 1:50,000 or larger.

Date(s) aerial images were photographed: Data not available.

The orthophoto or other base map on which the soil lines were compiled and digitized probably differs from the background imagery displayed on these maps. As a result, some minor shifting of map unit boundaries may be evident.

Custom Soil Resource Report
10 Map Unit Legend
Map Unit Symbol Map Unit Name Acres in AOI Percent of AOI 106 Biaggi loam, 5 to 15 percent
slopes

4.4 6.3%
139 Dystropepts, 30 to 75 percent
slopes

8.4 12.0%
183 Mallopass loam, 5 to 15 percent
slopes

1.1 1.6%
219 Urban land 56.2 80.1%
Totals for Area of Interest 70.1 100.0%
Map Unit Descriptions
The map units delineated on the detailed soil maps in a soil survey represent the soils or miscellaneous areas in the survey area. The map unit descriptions, along with the maps, can be used to determine the composition and properties of a unit.

A map unit delineation on a soil map represents an area dominated by one or more major kinds of soil or miscellaneous areas. A map unit is identified and named according to the taxonomic classification of the dominant soils. Within a taxonomic class there are precisely defined limits for the properties of the soils. On the landscape, however, the soils are natural phenomena, and they have the characteristic variability of all natural phenomena. Thus, the range of some observed properties may extend beyond the limits defined for a taxonomic class.

Areas of soils of a single taxonomic class rarely, if ever, can be mapped without including areas of other taxonomic classes. Consequently, every map unit is made up of the soils or miscellaneous areas for which it is named and some minor components that belong to taxonomic classes other than those of the major soils.

Most minor soils have properties similar to those of the dominant soil or soils in the map unit, and thus they do not affect use and management. These are called noncontrasting, or similar, components. They may or may not be mentioned in a particular map unit description. Other minor components, however, have properties and behavioral characteristics divergent enough to affect use or to require different management. These are called contrasting, or dissimilar, components. They generally are in small areas and could not be mapped separately because of the scale used. Some small areas of strongly contrasting soils or miscellaneous areas are identified by a special symbol on the maps. If included in the database for a given area, the contrasting minor components are identified in the map unit descriptions along with some characteristics of each. A few areas of minor components may not have been observed, and consequently they are not mentioned in the descriptions, especially where the pattern was so complex that it was impractical to make enough observations to identify all the soils and miscellaneous areas on the landscape.

The presence of minor components in a map unit in no way diminishes the usefulness or accuracy of the data. The objective of mapping is not to delineate Custom Soil Resource Report
11 pure taxonomic classes but rather to separate the landscape into landforms or landform segments that have similar use and management requirements. The delineation of such segments on the map provides sufficient information for the development of resource plans. If intensive use of small areas is planned, however, onsite investigation is needed to define and locate the soils and miscellaneous areas.

An identifying symbol precedes the map unit name in the map unit descriptions.

Each description includes general facts about the unit and gives important soil properties and qualities.

Soils that have profiles that are almost alike make up a soil series. Except for differences in texture of the surface layer, all the soils of a series have major horizons that are similar in composition, thickness, and arrangement.

Soils of one series can differ in texture of the surface layer, slope, stoniness, salinity, degree of erosion, and other characteristics that affect their use. On the basis of such differences, a soil series is divided into soil phases. Most of the areas shown on the detailed soil maps are phases of soil series. The name of a soil phase commonly indicates a feature that affects use or management. For example, Alpha silt loam, 0 to 2 percent slopes, is a phase of the Alpha series.

Some map units are made up of two or more major soils or miscellaneous areas.

These map units are complexes, associations, or undifferentiated groups.

A complex consists of two or more soils or miscellaneous areas in such an intricate pattern or in such small areas that they cannot be shown separately on the maps.

The pattern and proportion of the soils or miscellaneous areas are somewhat similar in all areas. Alpha-Beta complex, 0 to 6 percent slopes, is an example.

An association is made up of two or more geographically associated soils or miscellaneous areas that are shown as one unit on the maps. Because of present or anticipated uses of the map units in the survey area, it was not considered practical or necessary to map the soils or miscellaneous areas separately. The pattern and relative proportion of the soils or miscellaneous areas are somewhat similar. Alpha-Beta association, 0 to 2 percent slopes, is an example.

An undifferentiated group is made up of two or more soils or miscellaneous areas that could be mapped individually but are mapped as one unit because similar interpretations can be made for use and management. The pattern and proportion of the soils or miscellaneous areas in a mapped area are not uniform. An area can be made up of only one of the major soils or miscellaneous areas, or it can be made up of all of them. Alpha and Beta soils, 0 to 2 percent slopes, is an example.

Some surveys include miscellaneous areas. Such areas have little or no soil material and support little or no vegetation. Rock outcrop is an example.

Custom Soil Resource Report
12 Mendocino County, Western Part, California
106—Biaggi loam, 5 to 15 percent slopes
Map Unit Setting
National map unit symbol: hmk3
Elevation: 100 to 400 feet
Mean annual precipitation: 35 to 45 inches
Mean annual air temperature: 45 to 57 degrees F
Frost-free period: 250 to 330 days
Farmland classification: Not prime farmland
Map Unit Composition
Biaggi and similar soils: 80 percent
Minor components: 20 percent
Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Biaggi
Setting
Landform: Marine terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Residuum weathered from sandstone and shale Typical profile
H1 - 0 to 23 inches: loam
H2 - 23 to 27 inches: unweathered bedrock
Properties and qualities
Slope: 5 to 15 percent
Depth to restrictive feature: 20 to 40 inches to lithic bedrock Drainage class: Well drained
Runoff class: Medium
Capacity of the most limiting layer to transmit water (Ksat): Moderately high to high (0.60 to 2.00 in/hr)
Depth to water table: More than 80 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: Low (about 3.7 inches) Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: C
Ecological site: R004BY059CA - Loamy Terrace (Perennial Grass) Hydric soil rating: No
Minor Components
Abalobadiah
Percent of map unit: 4 percent
Hydric soil rating: No
Custom Soil Resource Report
13 Bruhel
Percent of map unit: 4 percent
Hydric soil rating: No
Mallopass
Percent of map unit: 4 percent
Hydric soil rating: No
Vizcaino
Percent of map unit: 4 percent
Hydric soil rating: No
Windyhollow
Percent of map unit: 2 percent
Hydric soil rating: No
Unnamed, gentler or steeper slopes
Percent of map unit: 2 percent
Hydric soil rating: No
139—Dystropepts, 30 to 75 percent slopes
Map Unit Setting
National map unit symbol: hmlk
Elevation: 10 to 1,500 feet
Mean annual precipitation: 35 to 55 inches
Mean annual air temperature: 48 to 57 degrees F
Frost-free period: 250 to 330 days
Farmland classification: Not prime farmland
Map Unit Composition
Dystropepts and similar soils: 75 percent
Minor components: 25 percent
Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Dystropepts
Setting
Landform: Marine terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Riser
Down-slope shape: Concave
Across-slope shape: Convex
Parent material: Residuum weathered from sandstone and shale Properties and qualities
Slope: 30 to 75 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Well drained
Depth to water table: More than 80 inches
Frequency of flooding: None
Custom Soil Resource Report
14 Frequency of ponding: None
Minor Components
Rock outcrop
Percent of map unit: 10 percent
Landform: Marine terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Riser
Down-slope shape: Concave
Across-slope shape: Convex
Hydric soil rating: No
Vizcaino
Percent of map unit: 8 percent
Landform: Marine terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Riser
Down-slope shape: Concave
Across-slope shape: Convex
Hydric soil rating: No
Abalobadiah
Percent of map unit: 7 percent
Landform: Marine terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Riser
Down-slope shape: Concave
Across-slope shape: Convex
Hydric soil rating: No
183—Mallopass loam, 5 to 15 percent slopes
Map Unit Setting
National map unit symbol: hmng
Elevation: 50 to 800 feet
Mean annual precipitation: 35 to 45 inches
Mean annual air temperature: 52 to 54 degrees F
Frost-free period: 250 to 330 days
Farmland classification: Not prime farmland
Map Unit Composition
Mallopass and similar soils: 85 percent
Minor components: 15 percent
Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Mallopass
Setting
Landform: Marine terraces, fan terraces
Landform position (two-dimensional): Backslope
Custom Soil Resource Report
15 Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Alluvium derived from igneous, metamorphic and sedimentary rock
Typical profile
A - 0 to 14 inches: loam
Bt1 - 14 to 34 inches: clay loam
Bt2 - 34 to 62 inches: gravelly sandy clay loam
Properties and qualities
Slope: 5 to 15 percent
Depth to restrictive feature: More than 80 inches
Drainage class: Moderately well drained
Runoff class: High
Capacity of the most limiting layer to transmit water (Ksat): Moderately high (0.20 to 0.60 in/hr)
Depth to water table: About 48 to 72 inches
Frequency of flooding: None
Frequency of ponding: None
Available water supply, 0 to 60 inches: High (about 9.1 inches) Interpretive groups
Land capability classification (irrigated): 3e
Land capability classification (nonirrigated): 3e
Hydrologic Soil Group: C
Ecological site: R004BY059CA - Loamy Terrace (Perennial Grass) Hydric soil rating: No
Minor Components
Flumeville
Percent of map unit: 8 percent
Landform: Marine terraces, fan terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: Yes
Biaggi
Percent of map unit: 5 percent
Landform: Marine terraces, fan terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: No
Tropaquepts
Percent of map unit: 2 percent
Landform: Depressions
Down-slope shape: Linear
Across-slope shape: Linear
Hydric soil rating: Yes
Custom Soil Resource Report
16 219—Urban land
Map Unit Composition
Urban land: 75 percent
Minor components: 24 percent
Estimates are based on observations, descriptions, and transects of the mapunit.

Description of Urban Land
Setting
Landform: Marine terraces
Landform position (two-dimensional): Backslope
Landform position (three-dimensional): Tread
Down-slope shape: Linear
Across-slope shape: Linear
Parent material: Fluviomarine deposits derived from sedimentary rock Minor Components
Shinglemill
Percent of map unit: 3 percent
Landform: Marine terraces
Hydric soil rating: Yes
Tropaquepts
Percent of map unit: 3 percent
Landform: Depressions
Hydric soil rating: Yes
Cabrillo
Percent of map unit: 3 percent
Hydric soil rating: No
Harecreek
Percent of map unit: 3 percent
Hydric soil rating: No
Tregoning
Percent of map unit: 3 percent
Landform: Marine terraces
Hydric soil rating: Yes
Biaggi
Percent of map unit: 3 percent
Hydric soil rating: No
Heeser
Percent of map unit: 3 percent
Hydric soil rating: No
Gibney
Percent of map unit: 3 percent
Custom Soil Resource Report
17 Hydric soil rating: No
Custom Soil Resource Report
18 References
American Association of State Highway and Transportation Officials (AASHTO). 2004. Standard specifications for transportation materials and methods of sampling and testing. 24th edition.

American Society for Testing and Materials (ASTM). 2005. Standard classification of soils for engineering purposes. ASTM Standard D2487-00.

Cowardin, L.M., V. Carter, F.C. Golet, and E.T. LaRoe. 1979. Classification of wetlands and deep-water habitats of the United States. U.S. Fish and Wildlife Service FWS/OBS-79/31.

Federal Register. July 13, 1994. Changes in hydric soils of the United States.

Federal Register. September 18, 2002. Hydric soils of the United States.

Hurt, G.W., and L.M. Vasilas, editors. Version 6.0, 2006. Field indicators of hydric soils in the United States.

National Research Council. 1995. Wetlands: Characteristics and boundaries.

Soil Survey Division Staff. 1993. Soil survey manual. Soil Conservation Service.

U.S. Department of Agriculture Handbook 18. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/national/soils/?cid=nrcs142p2_054262
Soil Survey Staff. 1999. Soil taxonomy: A basic system of soil classification for making and interpreting soil surveys. 2nd edition. Natural Resources Conservation Service, U.S. Department of Agriculture Handbook 436. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053577 Soil Survey Staff. 2010. Keys to soil taxonomy. 11th edition. U.S. Department of Agriculture, Natural Resources Conservation Service. http:// www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/?cid=nrcs142p2_053580 Tiner, R.W., Jr. 1985. Wetlands of Delaware. U.S. Fish and Wildlife Service and Delaware Department of Natural Resources and Environmental Control, Wetlands Section.

United States Army Corps of Engineers, Environmental Laboratory. 1987. Corps of Engineers wetlands delineation manual. Waterways Experiment Station Technical Report Y-87-1.

United States Department of Agriculture, Natural Resources Conservation Service.

National forestry manual. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/soils/ home/?cid=nrcs142p2_053374
United States Department of Agriculture, Natural Resources Conservation Service.

National range and pasture handbook. http://www.nrcs.usda.gov/wps/portal/nrcs/ detail/national/landuse/rangepasture/?cid=stelprdb1043084 19 United States Department of Agriculture, Natural Resources Conservation Service.

National soil survey handbook, title 430-VI. http://www.nrcs.usda.gov/wps/portal/ nrcs/detail/soils/scientists/?cid=nrcs142p2_054242
United States Department of Agriculture, Natural Resources Conservation Service. 2006. Land resource regions and major land resource areas of the United States, the Caribbean, and the Pacific Basin. U.S. Department of Agriculture Handbook 296. http://www.nrcs.usda.gov/wps/portal/nrcs/detail/national/soils/? cid=nrcs142p2_053624
United States Department of Agriculture, Soil Conservation Service. 1961. Land capability classification. U.S. Department of Agriculture Handbook 210. http:// www.nrcs.usda.gov/Internet/FSE_DOCUMENTS/nrcs142p2_052290.pdf Custom Soil Resource Report
20 Point Arena SCS Improvement Project
U.S. Fish and Wildlife Service, National Standards and Support Team, [email protected]
Wetlands
Estuarine and Marine Deepwater
Estuarine and Marine Wetland
Freshwater Emergent Wetland
Freshwater Forested/Shrub Wetland
Freshwater Pond
Lake
Other
Riverine
May 2, 2023
0 0.05 0.1 0.2 mi
0 0.1 0.2 0.4 km
1:7,577
This page was produced by the NWI mapper
National Wetlands Inventory (NWI)
This map is for general reference only. The US Fish and Wildlife Service is not responsible for the accuracy or currentness of the base data shown on this map. All wetlands related data should be used in accordance with the layer metadata found on the Wetlands Mapper web site.

Species List 3
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix3_Table1_SpecialStatusBotanicalSpecies.docx 1 Table 1
Regionally Occurring Special Status Plant Species Scoping List CNDDB, RareFind5, CNPS, IPaC (May 4, 2023) Point Arena and Surrounding Quadrangles
Point Arena Sanitary Collections System Improvement Project Scientific Name
Common
Name Family
Fed
List
State
List
Other
Status
Global
Rank
State
Rank
Plant
Rank
Bloom
Period General Habitat Micro-habitat
Potential of
Occurrence
Abronia
umbellata var.
breviflora
pink sandverbena
Nyctaginaceae None None S
G4G5-
T2 S2 1B.1
JunOct
Coastal dunes and coastal
strand.

Foredunes and interdunes
w/ sparse cover. Usually the
plant closest to the ocean.
0-10 m. None
Agrostis
blasdalei
Blasdale's
bent grass Poaceae None None S G2G3 S2 1B.2
MayJul
Coastal dunes, coastal bluff
scrub, coastal prairie.

Sandy or gravelly soil close to
rocks; often in nutrient-poor
soil with sparse vegetation.
5-365 m. Low
Arctostaphylos
nummularia
ssp.
mendocinoensis
pygmy
manzanita Ericaceae None None None G3?T1 S1 1B.2 Jan Closed-cone coniferous forest.

Acidic, sandy-clay soils in
dwarf coniferous forest.
90-185 m. None
Astragalus
agnicidus
Humboldt
County milkvetch Fabaceae None E S G2 S2 1B.1AprSep
Broadleaf upland forest, north
coast coniferous forest.

Disturbed openings in
partially timbered forest
lands; also along ridgelines;
south aspects.
160-670 m. None
Astragalus
rattanii var.
rattanii
Rattan's milkvetch Fabaceae None None None G4T4 S4 4.3 Apr-Jul Chaparral, cismontane
woodland, lower montane
conifer forest.

Open grassy hillsides,
gravelly flats in valleys, and
gravel bars of stream beds.
30-825 m. Moderate
Calamagrostis
bolanderi
Bolander's
reed grass Poaceae None None None G4 S4 4.2
MayAug
Closed-cone and N. coast
conifer forest, broadleaf
upland forest, coastal scrub,
marshes, swamps, meadows,
seeps, bogs and fens.

Mesic sites.
0-455 m. Low
Calystegia
purpurata ssp.
saxicola
coastal bluff
morningglory
Convolvulaceae None None None
G4T2-
T3 S2S3 1B.2
(Mar)
AprSep
Coastal bluff scrub, Coastal
dunes, Coastal scrub, North
Coast coniferous forest 0 - 105 meters Moderate
Campanula
californica
swamp
harebell
Campanulaceae None None S G3 S3 1B.2
JunOct
Bogs and fens, closed-cone
conifer forest, coastal prairie,
meadows and seeps,
freshwater marsh, North
coast coniferous forest.

Bogs and marshes in a
variety of habitats;
uncommon where it occurs.
1-405 m. Low
Carex
californica
California
sedge Cyperaceae None None None G5 S2 2B.2
MayAug
Bogs and fens, closed-cone
conifer forest, coastal prairie,
meadows, seeps, marshes,
and swamps.

Meadows, drier areas of
swamps, marsh margins.
90-335 m. Low
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix3_Table1_SpecialStatusBotanicalSpecies.docx 2 Table 1
Regionally Occurring Special Status Plant Species Scoping List CNDDB, RareFind5, CNPS, IPaC (May 4, 2023) Point Arena and Surrounding Quadrangles
Point Arena Sanitary Collections System Improvement Project Scientific Name
Common
Name Family
Fed
List
State
List
Other
Status
Global
Rank
State
Rank
Plant
Rank
Bloom
Period General Habitat Micro-habitat
Potential of
Occurrence
Carex lyngbyei
Lyngbye's
sedge Cyperaceae None None None G5 S3 2B.2
AprAug
Marsh & swamp (brackish or
freshwater). 0-200 m. None
Carex
saliniformis
deceiving
sedge Cyperaceae None None None G2 S2 1B.2
Jun
(Jul)
Coastal prairie, coastal scrub,
meadows, seeps, marshes,
and swamps (coastal salt).

Mesic sites.
2-230 m. Low
Castilleja
ambigua var.
ambigua johnny-nip
Orobanchaceae None None None G4T5 S4 4.2
MarAug
Coastal bluff scrub, Coastal
prairie, Coastal scrub, Valley
and foothill grassland, Vernal
pools margins.

Marshes and swamps,
0 - 435 meters Low
Castilleja
ambigua var.
humboldtiensis
Humboldt
Bay owl'sclover
Orobanchaceae None None S G4T2 S2 1B.2
AprAug Marshes and swamps.

Coastal saltmarsh with
Spartina, Distichlis,
Salicornia, Jaumea. 0-20 m. None
Castilleja
mendocinensis
Mendocino
Coast
paintbrush
Orobanchaceae None None S G2 S2 1B.2
AprAug
Coastal bluff scrub, coastal
scrub, coastal prairie, closedcone coniferous forest,
coastal dunes.

Often on sea bluffs or cliffs
in coastal bluff scrub or
prairie.
3-70 m. Low
Ceanothus
gloriosus var.
exaltatus glory brush Rhamnaceae None None None G4T4 S4 4.3 MarJun
(Aug) Chaparral 30 - 610 meters Moderate
Ceanothus
gloriosus var.
gloriosus
Point Reyes
ceanothus Rhamnaceae None None None G4T4 S4 4.3
MarMay
Closed-cone conifer forest,
coastal dunes, coastal scrub,
coastal bluff scrub.

Usually on bluffs along the
coast in sandy soils, but also
known from more inland
sites.
5-520 m. Moderate
Coptis laciniata
Oregon
goldthread
Ranunculaceae None None None G4? S3? 4.2
Mar-May
(SepNov)
North coast conifer forest,
meadows, and seeps.

Mesic sites such as moist
streambanks.
0-1,000 m. Low
Cuscuta pacifica
var. papillata
Mendocino
dodder
Convolvulaceae None None None G5T1 S1 1B.2
(Jun)
Jul-Oct Coastal dunes.

Interdune depressions.

Annual parasitic vine
observed on Gnaphalium,
Silene and Lupinus.
0-50 m. None
Erigeron
biolettii
streamside
daisy Asteraceae None None None G3? S3? 3
JunOct
Broadleaved upland forest,
Cismontane woodland, North
Coast coniferous forest.

Dry slopes, rocks, ledges
along rivers; mesic sites.
30-1,100 m. Low
Erigeron
supplex supple daisy Asteraceae None None None G2 S2 1B.2 MayJul
Coastal bluff scrub, coastal
prairie.

Usually in grassy sites.
5-185 m. Moderate
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix3_Table1_SpecialStatusBotanicalSpecies.docx 3 Table 1
Regionally Occurring Special Status Plant Species Scoping List CNDDB, RareFind5, CNPS, IPaC (May 4, 2023) Point Arena and Surrounding Quadrangles
Point Arena Sanitary Collections System Improvement Project Scientific Name
Common
Name Family
Fed
List
State
List
Other
Status
Global
Rank
State
Rank
Plant
Rank
Bloom
Period General Habitat Micro-habitat
Potential of
Occurrence
Erysimum
concinnum
bluff
wallflower Brassicaceae None None None G3 S2 1B.2 Feb-Jul Coastal dunes, coastal bluff
scrub, coastal prairie.

More or less a coastal
generalist within coastal
habitat types.
3-60 m. Moderate
Erythronium
revolutum
coast fawn
lily Liliaceae None None None G4G5 S3 2B.2
MarJul
(Aug)
Bogs and fens, broadleaf
upland forest, north coast
conifer forest.

Mesic sites; streambanks.
60-1,405 m. None
Fritillaria
roderickii
Roderick's
fritillary Liliaceae None E None G1Q S1 1B.1
MarMay
Coastal bluff scrub, coastal
prairie, valley and foothill
grassland.

Grassy slopes, mesas.
15-610 m. Moderate
Gilia capitata
ssp. pacifica Pacific gilia
Polemoniaceae None None None G5T3 S2 1B.2
AprAug
Coastal bluff scrub, chaparral,
coastal prairie, valley &
foothill grassland. 5-1,345 m. Moderate
Glehnia
littoralis ssp.
leiocarpa
American
glehnia Apiaceae None None None G5T4 S3 4.2
MayAug Coastal Dunes 0-20 m. None
Glyceria grandis
American
manna grass Poaceae None None None G5 S3 2B.3
JunAug
Bogs and fens, meadows and
seeps, marshes, and swamps.

Wet meadows, ditches,
streams, and ponds, in
valleys & lower elevations in
the mountains.
60-2,045 m. Moderate
Hesperevax
sparsiflora var.
brevifolia
short-leaved
evax Asteraceae None None S G4T3 S3 1B.2
MarJun
Coastal bluff scrub, coastal
dunes, coastal prairie.

Sandy bluffs and flats.
0-215 m. Moderate
Hesperocyparis
pygmaea
pygmy
cypress
Cupressaceae None None None G1 S1 1B.2 Closed-cone coniferous forest.

On podzol-like blacklock soil
in pygmy cypress forest
community.
30-430 m. None
Horkelia
marinensis
Point Reyes
horkelia Rosaceae None None None G2 S2 1B.2
MaySep
Coastal dunes, coastal prairie,
coastal scrub.

Sandy flats and dunes near
coast; in grassland or scrub
plant communities.
2-775 m. Moderate
Horkelia
tenuiloba
thin-lobed
horkelia Rosaceae None None S G2 S2 1B.2
MayJul
(Aug)
Broadleaved upland forest,
chaparral, valley and foothill
grassland.

Sandy soils; mesic openings.
45-640 m. Low
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix3_Table1_SpecialStatusBotanicalSpecies.docx 4 Table 1
Regionally Occurring Special Status Plant Species Scoping List CNDDB, RareFind5, CNPS, IPaC (May 4, 2023) Point Arena and Surrounding Quadrangles
Point Arena Sanitary Collections System Improvement Project Scientific Name
Common
Name Family
Fed
List
State
List
Other
Status
Global
Rank
State
Rank
Plant
Rank
Bloom
Period General Habitat Micro-habitat
Potential of
Occurrence
Hosackia
gracilis
harlequin
lotus Fabaceae None None None G3G4 S3 4.2
MarJul
Broadleaf upland forest, coast
bluff scrub, coast prairie,
coast scrub, closed-cone
conifer forest, meadow, seep,
marsh & swamp, North coast
coniferous forest, valley &
foothill grassland.

Wetlands and roadsides.
0-700 m. Moderate
Hypogymnia
schizidiata
island tube
lichen None None None G2G3 S2 1B.3 n/a
Chaparral, closed-cone
coniferous forest.

On bark/wood of hardwoods
& conifers. 360-405 m. None
Kopsiopsis
hookeri
small groundcone
Orobanchaceae None None None G4? S1S2 2B.3
AprAug North coast coniferous forest.

Open woods, shrubby places,
generally on Gaultheria
shallon.
120-1,435 m. None
Lasthenia
burkei
Burke’s
goldfields Asteraceae E E None G1 S1 1B.1
AprJune
Vernal pools, meadows, and
seeps.

Most often in vernal pools
and swales.
15-600 m. Low
Lasthenia
californica ssp.
bakeri
Baker's
goldfields Asteraceae None None None G3T1 S1 1B.2
AprOct
Closed-cone conifer forest,
coastal scrub, meadows,
seeps, marshes & swamps.

Openings.
60-520 m. Low
Lasthenia
californica ssp.
macrantha
perennial
goldfields Asteraceae None None None G3T2 S2 1B.2
JanNov
Coastal bluff scrub, coastal
dunes, coastal scrub. 5-185 m. Moderate
Lasthenia
conjugens
Contra Costa
goldfields Asteraceae E None None G1 S1 1B.1
MarJun
Valley & foothill grassland,
vernal pools, alkaline playas,
cismontane woodland.

Vernal pools, swales, low
depressions, in open grassy
areas.
1-450 m. Low
Lathyrus
palustris marsh pea Fabaceae None None None G5 S2 2B.2
MarAug
Bogs & fens, lower montane
conifer forest, marsh &
swamp, North coast
coniferous forest, coastal
prairie, coastal scrub.

Moist coastal areas.
2-140 m. Low
Lilium
maritimum coast lily Liliaceae None None None G2 S2 1B.1 MayAug
Closed-cone conifer forest,
coastal prairie, coastal scrub,
broadleaf upland forest,
North coast coniferous forest,
marshes & swamps.

Historically in sandy soil,
often on raised hummocks
or bogs; today mostly in
roadside ditches.
4-475 m. Moderate
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix3_Table1_SpecialStatusBotanicalSpecies.docx 5 Table 1
Regionally Occurring Special Status Plant Species Scoping List CNDDB, RareFind5, CNPS, IPaC (May 4, 2023) Point Arena and Surrounding Quadrangles
Point Arena Sanitary Collections System Improvement Project Scientific Name
Common
Name Family
Fed
List
State
List
Other
Status
Global
Rank
State
Rank
Plant
Rank
Bloom
Period General Habitat Micro-habitat
Potential of
Occurrence
Lilium
rubescens redwood lily Liliaceae None None None G3 S3 4.2 AprAug
(Sep)
Chaparral, low & upper
montane conifer forest,
broad-leaf upland forest,
North coast conifer forest.

Sometimes on serpentine.
30-1,910 m. None
Microseris
paludosa
marsh
microseris Asteraceae None None None G2 S2 1B.2
AprJun
(Jul)
Closed-cone conifer forest,
cismontane woodland, coastal
scrub, valley and foothill
grassland. 3-610 m. Low
Mitellastra
caulescens
leafystemmed
mitrewort
Saxifragaceae None None None G5 S4 4.2
(Mar)
AprOct
Broadleaf upland forest, lower
montane conifer forest,
meadow & seep, North coast
coniferous forest.

Mesic sites.
5-1,700 m. Low
Oenothera
wolfii
Wolf's
eveningprimrose Onagraceae None None S G2 S1 1B.1MayOct Coastal bluff scrub, coastal
dunes, coastal prairie, low
montane conifer forest.

Sandy substrates; usually
mesic sites.
0-125 m. Moderate
Perideridia
gairdneri ssp.
gairdneri
Gairdner's
yampah Apiaceae None None None
G5T3-
T4 S3S4 4.2
JunOct
Broadleaf upland forest,
chaparral, coastal prairie,
valley and foothill grassland,
vernal pools.

Adobe flats, grasslands, wet
meadows & vernal pools,
under Pinus radiata along
coast; mesic sites.
0-610 m. Moderate
Piperia candida
whiteflowered rein
orchid Orchidaceae None None S G3? S3 1B.2
(Mar)
MaySep
North Coast and lower
montane coniferous forest,
broadleaf upland forest.

Sometimes serpentine.

Forest duff, mossy banks,
rock outcrops, muskeg.
45-1,615 m. None
Pleuropogon
refractus
nodding
semaphore
grass Poaceae None None None G4 S4 4.2
(Mar)
AprAug
Meadow & seep, low
montane conifer forest, North
coast coniferous forest,
riparian forest.

Mesic sites along streams,
grassy flats in shaded
redwood groves.
0-1,600 m. Low
Potamogeton
epihydrus
Nuttall's
ribbon-leaved
pondweed
Potamogetonaceae None None None G5 S2S3 2B.2
(Jun)
Jul-Sep Marshes and swamps.

Shallow water, ponds, lakes,
streams, irrigation ditches.
295-2,640 m. None
Sidalcea
calycosa ssp.
rhizomata
Point Reyes
checkerbloom Malvaceae None None None G5T2 S2 1B.2
AprSep Marshes and swamps.

Freshwater marshes near the
coast.
5-95 m. None
Sidalcea
malachroides
maple-leaved
checkerbloom Malvaceae None None None G3 S3 4.2
(Mar)
AprAug
Broadleaf upland forest, coast
prairie, coast scrub, North
coast conifer forest, riparian.

Woodlands and clearings
near coast; often in
disturbed areas.
0-730 m. Moderate
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix3_Table1_SpecialStatusBotanicalSpecies.docx 6 Table 1
Regionally Occurring Special Status Plant Species Scoping List CNDDB, RareFind5, CNPS, IPaC (May 4, 2023) Point Arena and Surrounding Quadrangles
Point Arena Sanitary Collections System Improvement Project Scientific Name
Common
Name Family
Fed
List
State
List
Other
Status
Global
Rank
State
Rank
Plant
Rank
Bloom
Period General Habitat Micro-habitat
Potential of
Occurrence
Sidalcea
malviflora ssp.
purpurea
purplestemmed
checkerbloom Malvaceae None None None G5T1 S1 1B.2
MayJun
Broadleaved upland forest,
coastal prairie. 15-85 m. Moderate
Streptanthus
glandulosus
ssp. hoffmanii
Hoffman's
bristly
jewelflower Brassicaceae None None None G4T2 S2 1B.3
MarJul
Chaparral, cismontane
woodland, valley and foothill
grassland.

Moist, steep rocky banks, in
serpentine and nonserpentine soil.
60-765 m. Low
Sulcaria
spiralifera
twisted
horsehair
lichen
Parmeliace
ae None None BLM-S G3G4 S2 1B.2 Lichen
Coastal dunes,
N. coast conifer forest
(immediate coast)
Usually on conifers.
0-90 m. Moderate
Trifolium
amoenum
showy Indian
clover Fabaceae E None None G1 S1 1B.1
AprJune
Valley and foothill grassland,
coastal bluff scrub.

Sometimes serpentine soil,
open sunny sites, swales.

Recently cited on roadside &
eroding cliff face.
5-310 m. Moderate
Trifolium
buckwestiorum
Santa Cruz
clover Fabaceae None None S G2 S2 1B.1
AprOct
Coastal prairie, broadleaf
upland forest, cismontane
woodland.

Moist grassland. Gravelly
margins.
30-550 m. Moderate
Trifolium
trichocalyx
Monterey
clover Fabaceae E E None G1 S1 1B.1
AprJun Closed-cone coniferous forest.

Openings, burned areas, and
roadsides. Sandy soils.
60-210 m. Low
Usnea
longissima
Methuselah's
beard lichen
Parmeliaceae None None S G4 S4 4.2 n/aNorth coast coniferous forest, broadleaf upland forest.

In the "redwood zone" on
branches of a variety of
trees, including big leaf
maple, oaks, ash, Douglas fir,
and bay.
45-1,465 m in California. None
Veratrum
fimbriatum
fringed falsehellebore
Melanthiaceae None None None G3 S3 4.3 Jul-Sep
Coastal scrub, north coast
coniferous forest, bogs and
fens, meadows
and seeps.

Marine terrace deposits;
mesic sites.
3-300 m. Low
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data\Appendix3_Table1_SpecialStatusBotanicalSpecies.docx 7 Table 1
Regionally Occurring Special Status Plant Species Scoping List CNDDB, RareFind5, CNPS, IPaC (May 4, 2023) Point Arena and Surrounding Quadrangles
Point Arena Sanitary Collections System Improvement Project Scientific Name
Common
Name Family
Fed
List
State
List
Other
Status
Global
Rank
State
Rank
Plant
Rank
Bloom
Period General Habitat Micro-habitat
Potential of
Occurrence

1. Species indicator status as assigned by Federal Endangered Species Act (FESA), California Endangered Species Act (CESA), and California Department of Fish and Wildlife (CDFW)
C: candidate FP: fully protected
CT: candidate threatened PT: proposed threatened
D: delisted SSC: species of special concern
DPS: distinct population segment T: threatened
E: endangered WL: watch list
ESU: evolutionarily significant unit S: sensitive

2. Species Heritage rank as assigned by California Department of Fish and Wildlife (CDFW) G1/S1: critically imperiled
G2/S2: imperiled
G3/S3: vulnerable
G4/S4: apparently secure
G5/S5: secure
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data 1 Table 2
Botanical Species Observed 4/20/2023
Sanitary Sewer Collection System, Point Arena CA
Scientific Name Common Name Family Native?
Trees
Abies grandis grand fir Pinaceae Ya
Acacia melanoxylon black acacia Fabaceae I
b
Cordyline australis cabbage tree Asparagaceae Nc
Eucalyptus globulus blue gum Myrtaceae I
Hesperocyparis macrocarpa Monterey cypress Cupressaceae N Ilex aquifolium English holly Aquifoliaceae I
Pinus contorta var. contorta shore pine Pinaceae Y
Pinus muricata Bishop pine Pinaceae Y
Pinus radiata Monterey pine Pinaceae N
Prunus cerasifera wild plum Rosaceae I
Pseudotsuga menziesii var.
menziesii Douglas fir Pinaceae Y
Salix hookeriana coast willow Salicaceae Y
Sambucus racemose var.
racemose red elderberry Adoxaceae Y
Sequoia sempervirens coast redwood Cupressaceae Y
Thuja plicata Western red cedar Cupressaceae Y
Shrubs
Baccharis pilularis ssp.
consanguinea coyote brush Asteraceae Y
Cotoneaster lacteus milkflower cotoneaster Rosaceae I
Ligustrum ovalifolium privet Oleaceae N
Lupinus albifrons ssp.unknown silverbush lupine Fabaceae Y Lupinus sp. (annual) lupine Fabaceae ?
Pelargonium vitifolium grapeleaf geranium Geraniaceae N Polystichum munitum Western sword fern Dryopteridaceae Y Pteridium aquilinum var.
pubescens Western bracken fern Dennstaedtiaceae Y
Rosa rubiginosa sweetbriar Rosaceae N
Rubus armeniacus Himalayan blackberry Rosaceae I
Rubus ursinus California blackberry Rosaceae Y
Toxicodendron diversilobum poison oak Anacardiaceae Y
Sedges and Rushes
Cyperus eragrostis tall flat sedge Cyperaceae Y
Equisetum arvense common horsetail Equisetaceae Y
Juncus bufonius var. occidentalis toadrush Juncaceae Y
Juncus effusus ssp. pacificus Pacific lamp rush Juncaceae Y Luzula comosa var. comosa hairy wood rush Juncaceae Y
Grasses
Agrostis stolonifera creeping bentgrass Poaceae I
Anthoxanthum odoratum sweet vernal grass Poaceae I
Avena barbata wild oat Poaceae I
Briza maxima large quaking grass Poaceae I
Bromus diandrus ripgut brome Poaceae I
Bromus hordeaceus ssp.
hordaeceus soft chess Poaceae I
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data 2 Table 2
Botanical Species Observed 4/20/2023
Sanitary Sewer Collection System, Point Arena CA
Scientific Name Common Name Family Native?
Bromus sitchensis var. carinatus California brome Poaceae Y Cortoderia selloana pampas grass Poaceae I
Dactylis glomerata orchard grass Poaceae I
Ehrharta erecta upright vedtgrass Poaceae I
Festuca myuros six-weeks grass Poaceae I
Festuca perennis Italian wildrye Poaceae I
Festuca rubra red fescue Poaceae Y
Holcus lanatus velvet grass Poaceae I
Hordeum murinum ssp. murinum wall barley Poaceae I
Poa annua annual bluegrass Poaceae N
Rhytidosperma penicillatum hairy oatgrass Poaceae N
Herbs
Agapanthus praecox African lily Liliaceae N
Allium triquetrum white flowered onion Amaryllidaceae N Anthriscus caucalis bur-chervil Apiaceae N
Aphanes occidentalis lady’s mantle Rosaceae Y
Arctotheca prostrata prostrate capeweed Asteraceae I
Bellis perennis English daisy Asteraceae N
Borago officinalis garden borage Boraginaceae N
Cardamine oligosperma bittercress Brassicaceae Y
Carduus pycnocephalus ssp.
pycnocephalus Italian thistle Asteraceae I
Centranthus ruber Jupiter’s beard Valerianaceae N
Cerastium fontanum ssp. vulgare small mouse-ear Caryophyllaceae N Chasmanthe floribunda African cornflag Iridaceae I
Claytonia perfoliata ssp.
perfoliata miner’s lettuce Montiaceae Y
Conium maculatum poison hemlock Apiaceae I
Convulvulus arvensis field bindweed Convulvulaceae N
Daucus carota Queen Anne’s lace Apiaceae N
Dipsacus fullonum fuller’s teasel Caprifoliaceae I
Echium pininana pine echium Boraginaceae N
Erigeron canadensis horseweed Asteraceae Y
Erigeron karvinskianus fleabane Asteraceae N
Erodium circutarium coast heron’s bill Geraniaceae I
Erodium moschatum whitestem filaree Geraneaceae N
Eschscholzia californica California poppy Papaveraceae Y Euphorbia peplus petty spurge Euphorbiaceae N
Foeniculum vulgare sweet fennel Apiaceae I
Fragaria vesca wild strawberry Rosaceae Y
Galium aparine cleaver plant Rubiaceae Y
Galium parisiense wall bedstraw Rubiaceae N
Geranium dissectum cutleaf geranium Geraniaceae I
Geranium rodentionum Robert’s geranium Geraniaceae N
Horkelia sp. (no diagnostric
feature) Horkelia-unknown Rosaceae Y
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data 3 Table 2
Botanical Species Observed 4/20/2023
Sanitary Sewer Collection System, Point Arena CA
Scientific Name Common Name Family Native?
Hypochaeris radicata hairy cat’s ear Asteraceae I
Iris douglasiana Douglas iris Iridaceae Y
Iris germanica German iris Iridaceae N
Kniphofia uvaria fire poker Asphodelaceae I
Lamium purpureum purple dead-nettle Lamiaceae N
Lampranthus aurantiacus golden iceplant Aizoaceae N
Lathyrus latifolius sweet pea Fabaceae N
Leontodon saxatilis ssp. saxatilis hawkbit Asteraceae N Lepidium didymium swinecress Brassicaceae N
Lobularia maritima sweet alyssum Brassicaceae I
Lotus angustissimus slender lotus Fabaceae N
Lotus corniculatus bird-foot trefoil Fabaceae N
Lysimachia arvensis scarlet pimpernel Myrsinaceae N
Matricaria discoidea pineapple weed Asteraceae Y
Medicago polymorpha bur clover Fabaceae I
Mentha pulegium pennyroyal Lamiaceae I
Myosotis latifolia forget-me-not Boraginaceae N
Narcissus plnarcissus daffodil Amaryllidaceae N
Oxalis articulata ssp. rubra windowbox woodsorrel Oxalidaceae N Oxalis corniculata creeping woodsorrel Oxalidaceae N
Oxalis pes-caprae Bermuda buttercup Oxalidaceae I
Oenanthe sarmentosa water parsley Apiaceae Y
Plantago coronopus staghorn plantain Plantaginaceae N
Plantago lanceolata English plantain Plantaginaceae I
Polygonum aviculare ssp.
aviculare prostrate knotweed Polygonaceae N
Potentilla anserina ssp. pacifica silverweed Rosaceae Y Pseudognaphalium luteoalbum Jersey cudweed Asteraceae N Raphanus sativus wild radish Brassicacae I
Roldana petasitis velvet groundsel Asteraceae N
Rumex acetosella sheep sorrel Polygonaceae I
Rumex conglomeratus green dock Polygonaceae N
Rumex crispus curly dock Polygonaceae I
Sagina apetala dwarf pearlwort Caryophyllaceae N
Scrophularia californica bee plant Scrophulariaceae Y
Senecio vulgaris common groundsel Asteraceae N
Silene gallica common catchfly Caryophyllaceae N
Silybum marianum blessed milk thistle Asteraceae I
Soleirolia soleirolii baby’s tears Urticaceae N
Sonchus asper prickly sow thistle Asteraceae N
Sonchus oleraceus sow thistle Asteraceae N
Spergularia rubra sand spurrey Caryophyllaceae N
Stachys rigida var. rigida rough hedgenettle Lamiaceae Y Stellaria media chickweed Caryophyllaceae N
Symphyotrichum chilense California aster Asteraceae Y
P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\Data 4 Table 2
Botanical Species Observed 4/20/2023
Sanitary Sewer Collection System, Point Arena CA
Scientific Name Common Name Family Native?
Taraxacum officinale ssp.
officinale dandelion Asteraceae N
Trifolium repens white clover Fabaceae N
Trifolium subterraneum subterranean clover Fabaceae N
Tropaeolum majus garden nasturtium Tropaeolaceae N
Veronica arvensis creeping speedwell Plantaginaceae N
Vicia sativa ssp. sativa spring vetch Fabaceae N
Vicia tetrasperma four seeded vetch Fabaceae N
Vinca major vinca Apocynaceae I
Vigna unguiculata cowpea Fabaceae N
Zantedeschia aethiopica calla lily Aracaceae I
Vines
Delairea odorata cape ivy Asteraceae I
Hedera helix English ivy Araliaceae I
Mosses and Lichens
Kindbergia oregana kindbergia feather moss Brachytheciaceae Y 136 Species
26%
Native
a Y: Native species
b
I: Invasive species
c N: Non-native species
Data Forms 4

P:\Willits\2021\421062-PACollSysSRF\250-EnviroPermit\PUBS\rpts\20231026-BioWetlandRpt.doc Eureka, CA Arcata, CA Redding, CA Willits, CA Fort Bragg, CA Coos Bay, OR Klamath Falls, OR 1 R ic h a r d S a m p le E n g in e e r in g
1 1 9 7 M a g n o lia A v e . R e d d in g , C A 9 6 0 0 1 5 3 0 -2 4 2 -1 1 3 4 E -m a il:R ic h a rd @ rs e in te g rity .c o m DATE: May 13, 2022
TO: LORY WIDMER, SHN ENGINEERS AND GEOLOGISTS, INC.