Attachment A - Mitigated Negative Declaration
CITY OF PASADENA
PUBLIC WORKS DEPARTMENT
100 NORTH GARFIELD AVENUE
PASADENA, CA 91101
INITIAL STUDY
State Clearinghouse No. 2019079063
This Initial Study provides the assessment for a determination whether the project may have a significanteffect on the environment.
SECTION I - PROJECT INFORMATION
1. Project Title: Holly Street Bridge Seismic Retrofit Project
2. Lead Agency Name and Address:3. Contact Person and Phone Number:4. Project Location:
City of Pasadena, 100 North Garfield Avenue,Pasadena, CA 91101James Tong, Project Manager, (626) 744-3971 Holly Street Bridge over Arroyo Seco Flood Control
Channel (southeast of Linda Vista Avenue), City of
Pasadena, Los Angeles County, California (see Figures
1-3 and addition detail provided below in part 8.
Description of the Project).
5. Project Sponsor's Name and Address: City of Pasadena, 100 North Garfield Avenue, Pasadena, CA 91101
6. General Plan Designation:
7. Zoning:
8. Description of the Project:
Low Density Residential, Medium Density Residential,
Open SpaceROW, OS-Open Space, RM-Multi-Family Residential,and RS-Single-Family Residential The City, in coordination with the California Department of Transportation (Caltrans), proposes to rehabilitate and seismically retrofit the existing two-lane Holly Street Bridge (No. 53C1041) over the ArroyoSeco channel, the Arroyo Seco Trail (a Class 1 multi-use trail), and North Arroyo Boulevard. The seismicretrofit of Holly Street Bridge would occur on the Holly Street Bridge over the Arroyo Seco Flood ControlChannel southeast of Linda Vista Avenue in the City of Pasadena, Los Angeles County, California within the San Pascual (Garfias) Land Gfan^-Grant (unsectioned portion) of Township 1 North, Range 12 West (San Bernardino Meridian and Baseline), as depicted on the USGS Pasadena, California 7.5-minute topographic map. Staging areas would occur along North Arroyo Boulevard between the Holly Street Bridge and Seco Street, as well as other staging areas at the intersection of Seco Street and West Drive.
Access to the bridge would also occur along North Arroyo Boulevard and Linda Vista Avenue (Figure 1 - Project Vicinity, Figure 2 - Project Location, and Figure 3 - Project Area).Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 1 ^
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BRLO-5064(078)
Holly Street Brtfge Seismic Retrofit Project
City of Pasadena, Los Angeles County, California
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The existing bridge was constructed in 1925 and is 45.3-feet wide by 400.0-feet long. It carries two-tanes of traffic over the Arroyo Seco and North Arroyo Boulevard (one lane in each direction), as well as twosidewalks along its north and south sides with no barrier between the sidewalk and vehicular traffic. Thebridge is a concrete arch-deck span constructed from cast-in-place concrete. The current Annual Average Daily Traffic (AADT) is 7,453. According to the 2020 Caltrans Bridge Inspection Report (BIR),the bridge currently (July 2016) holds a sufficiency rating of 39.4 and is classified as Structurally Deficient.
The proposed Project would provide needed rehabilitation and a seismic retrofit to the existing bridge.
Bridge rehabilitation and retrofit would include a deck rehabilitation, rehabilitation of the existing concretebarrier, joint rehabilitation, spandrel column retrofit, and barrier replacement, luminaire replacement,archway stiffening, joint strengthening, column strengthening, pier cap strengthening, retrofit foundation<=>el4-^ewn®—concrete spall repair, crack sealing, and a bonded grout treatment (Figure 4 - ProjectFeatures).
A raised construction work platform would be temporarily constructed over the Arroyo Seco concrete channel, North Arroyo Boulevard, and the Class 1 multi-use trail so that these facilities may remainuntouched and functioning for the duration of construction (Figure 5 - Construction Access). The platform would provide construction access to the underside of the bridge to allow the retrofit and rehabilitation actions to occur. The temporary platform wtit-would be built either adjacent to or suspended from the HollyStreet Bridge. If not suspended from the bridge itself, the platform would be built utilizing a support structureof piles or abutments, located outside the channel but within the Los Angeles County Flood Control District's right-of-way. After the piles or abutments are in place, a temporary bridge deck would be installed on top of the support structures, spanning over the channel. A temporary bridge would be constructed over the Arroyo Seco Flood Control Channel to provide construction equipment access to both sides of the channel. This bridge would be a separate structure from the raised construction work platform under theHolly Street Bridge. Duration of construction is still being determined but may take between 12 and 18months. Deck rehabilitation would require closure of the Holly Street Bridae to vehicle and pedestrian traffic for several months; however, adjacent communities would be notified prior to the closure and theThe Holly Street Bridge would be closed approximately 9 months out of the 18 month construction period. Theproposed Project would involve the use of a detour and temporary access route using Linda Vista Avenue,San Rafael Avenue, Colorado Boulevard, and Orange Grove Boulevard.
The maximum depth of excavation is anticipated at 15 feet below ground surface. Drilled piles, up to 50foot bolow the pile cap may be required in select portions of the Area of Potential Effects (APE). Grading is intended to bo bolancod but a small (approximatoly 100 cubic yordo) of export soil moy bo nGoded toaooommodato instaltQtion of the oxpandod pile cap. Several potential construction staging areas havebeen designated north of the Holly Street Bridge. These areas include a portion of Brookside Park Parking Lot I, and undeveloped City owned properties near the Seco Street crossing of the Arroyo Seco Flood Control Channel (see Figure 3).Overhead electric and telephone utilities along the bridge may need to be relocated to accommodate thebridge rehabilitation. In addition, a telephone conduit utility attached to the side of the bridge may require temporary relocation. Utility relocations are expected to occur within the existing City road right-of-way.Additional electrical and gas utilities would be added to the bridge. Further, a sidewalk complying with theAmericans with Disability Act (ADA) would be constructed along the southwest approach to the bridge.
This sidewalk would also require utility relocations, which would occur within City right-of-way.
All work is expected to occur within the existing right-of-way (ROW), with the exception of partial ROW acquisitions for new sidewalks and temporary construction easements (TCEs) required. Temporary construction easements and utility relocations would occur as a result of the proposed Project since anaccess road on the west side and east side of North Arroyo Boulevard would may need to be constructed in order to allow contractors to access the bridge.Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page5 The bridge is on the eligible bridge list for rehabilitation through the Highway Bridge Program (HBP) under lump sum funds for the Federal Transportation Improvement Program (FTIP). The proposed Project is federally funded and requires compliance with both the National Environmental Policy Act (NEPA) and theCalifornia Environmental Quality Act (CEQA). The lead agency for the CEQA compliance is the City of Pasadena; the federal lead agency for NEPA compliance is Caltrans.Surrounding Land Uses and Setting: The surrounding land use is encompassed by residential use on either side of the bridge, above the Arroyo Seco, and recreational use within the Arroyo Seco and Brookside Parks.
9. Surrounding Land Uses and Setting: The Holly Street Bridge is located on public right-of-way over the Arroyo Seco, which is designated as an Open Space land use by the City of PasadenaGeneral Plan. Surrounding the project area on both sides of the Arroyo Seco are Low Density Residential and Medium Density Residential land uses (single family dwelling residences). The setting of the Arroyo Seco in the project area is comprised of the Arroyo Seco flood controlchannel, North Arroyo Boulevard, and the Arroyo Seco trail at the bottom of the ravine. The sidesof the ravine are dominated by mixed woodland habitat, and the Holly Street Bridge spans the ravine. The setting of the surrounding residential properties is comprised of a well-establishedneighborhood on the west side of the Arroyo Seco and a mix of single-family and multi-familyresidences on the east side. Mature trees are present throughout the residential areas on both sides of the Arroyo Seco.
10.0ther public agencies whose approval is required: This IS/MND is intended to analyze all discretionary approvals needed to implement construct and operate the Project. These approvals by the City or other public agencies (e.g. permits, financing approval, or participation agreement),may include but are not limited to the following:
Project Approval, All Project Phases - City of Pasadena o Adoption of the Mitigated Negative Declaration for the proposed Project and adoption of the Mitigation Monitoring and Reporting Plan;
o Approval to proceed with Final Design and Right-of-Way phases;o Authorization to submit funding requests;o Approval to award contract for construction. • National Environmental Policy Act and Authorization of Federal Funds - California Department of TransportationSection 106 Documentation-California Department of Transportation (approval) and State Historic Preservation Officer (SHPO) (concurrence)
11. Have California Native American tribes traditionally and culturally affiliated with the project are requested consultation pursuant to Public Resources Code section 21080.3.1? If so, is there aplan for consultation that includes, for example, the determination of significance of impacts to tribalcultural resources, procedures regarding confidentiality, etc.? Initial consultation letters dated March 15, 2018 were mailed to the Native American contacts provided by the Native American Heritage Commission1 and the City of Pasadena. The lettersprovided a summary of the proposed project and requested information regarding comments orconcerns the Native American community might have about the proposed project. Follow-up calls for those who did not respond to the initial letter were placed on April 16, 2018 and May 2, 2018.
The Gabrieleno Band of Mission Indians - Kizh Nation requested consultation pursuant to AB52 ' As part of the National Historic Preservation Act Section 106 process that is required due to the proposed federal funding forthe Project, the Native American Heritaee Commission was contacted for a list ofDotentiallv culturally affiliated tribes.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page6 and CEQA. A summary of that consultation and resulting measures to mitigate potential impacts is provided in Section 2.20 Tribal Cultural Resources.
hlolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 7 I
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ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED:
The environmental factors checked below would be potentially affected by this Project, involving at least one impact that is a "Potentially Significant Impact" as indicated by the checklist on the following pages.
Aesthetics Geology and Soils Public ServicesAgricultural Resources Hazards and Hazardous Materials RecreationAir Quality Hydrology and Water Quality Transportation Biological Resources Land Use and Planning Tribal Cultural Resources Cultural Resources Mineral Resources Utilities and Service Systems Energy Noise WildfireGreenhouse Gases Population and Housing Mandatory Findings of Significance Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 10 DETERMINATION: (to be completed by the Lead Agency)
On the basis of this initial evaluation:I find that the proposed Project COULD NOT have a significant effect on the environment, and aNEGATIVE DECLARATION will be prepared.
I find that, although the proposed Project could have a significant effect on the environment, therewill not be a significant effect in this case because the mitigation measures described on anattached sheet have been added to the Project. A MITIGATED NEGATIVE DECLARATION will beprepared. x
I find that the proposed Project MAY have a significant effect on the environment, and anENVIRONMENTAL IMPACT REPORT is required.
I find that the proposed Project MAY have a "potentially significant impact" or "potentially significantunless mitigated" impact on the environment., but at least effect 1) has been adequately analyzedin an earlier document pursuant to applicable legal standards, and 2) has been addressed bymitigation measures based on the earlier analysis as described on attached sheets. AnENVIRONMENTAL IMPACT REPORT is required, but it must analyze only the effects that remainto be addressed.
I find that although the proposed Project could have a significant effect on the environment, becauseall potentially significant effects (a) have been analyzed adequately in an earlier EIR or NEGATIVEDECLARATION pursuant to applicable standards, and (b) have been avoided or mitigated pursuantto that earlier EIR or NEGATIVE DECLARATION, including revisions or mitigation measures thatare imposed upon the proposed Project, nothing further is required. 8-1-2024
Prepared ByAmy Dunay
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Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page 10 D
2)
3)
4)
5)6)
7)
EVALUATION OF ENVIRONMENTAL IMPACTS:
A brief explanation is required for all answers except "No Impact" answers that are adequately supported by the information sources a lead agency cites in the parentheses following each question.
A "No Impact" answer is adequately supported if the referenced information sources show that the impact simply does not apply to projects like the one involved (e.g., the project falls outside a faultrupture zone). A "No Impact" answer should be explained where it is based on Project-specific factorsas well as general standards (e.g., the project will not expose sensitive receptors to pollutants, basedon a Project-specific screening analysis).All answers must take account of the whole action involved, including off-site as well as on-site, cumulative as well as Project-level, indirect as well as direct, and construction as well as operationalimpacts.
Once the lead agency has determined that a particular physical impact may occur, then the checklistanswers must indicate whether the impact is potentially significant, less than significant with mitigation,or less than significant. "Potentially Significant Impact' is appropriate if there is substantial evidence that an effect is significant. If there are one or more "Potentially Significant Impact" entries when the determination is made, an EIR is required."Negative Declaration: Significant Unless Mitigation is Incorporated" applies where the incorporation of mitigation measures has reduced an effect from "Potentially Significant Unless Mitigation Incorporated" applies where the incorporation of mitigation measures has reduced an effect from "PotentiallySignificant Impact" to a "Less than Significant Impact." The Lead Agency must describe the mitigation measures and briefly explain how they reduce the effect to a less than significant level (mitigationmeasures from Section 21, "Earlier Analysis," may be cross-referenced).Earlier analysis may be used where, pursuant to the tiering, program El R, or other CEQA process, an effect has been adequately analyzed in an earlier EIR or negative declaration. See CEQA Guidelines Section 15063( c)(3)(D). Earlier analyses are discussed in Section 21 at the end of the checklist. a) Earlier Analysis Used. Identify and state where they are available for review.b) Impacts Adequately Addressed. Identify which effects from the above checklist were within the scope of and adequately analyzed in an earlier document pursuant to applicable legalstandards, and state whether such effects were addressed by mitigation measures based on the earlier analysis.
c) Mitigation Measures. For effects that are "less than Significant with Mitigation Measures Incorporated," describe the mitigation measures which were incorporated or refined from the earlier documents and the extent to which address site-specific conditions for the Project.
Lead agencies are encouraged to incorporate into the checklist references to information sources forpotential impacts (e.g., general plans, zoning ordinances). Reference to a previously prepared or outside document should, where appropriate, include a reference to the page or pages where thestatement is substantiated.
Supporting Information Sources: A source list shouldindividuals contacted should be cited in the discussion. be attached, and other sources used or
8) The explanation of each issue should identify:
a) The significance criteria or threshold, if any, used to evaluate each question; and b) The mitigation measure identified, if any, to reduce the impact to less than significant.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 12 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
SECTION II - ENVIRONMENTAL CHECKLIST FORM
1. BACKGROUND.
Date checklist submitted: April 4, 2019
Department requiring checklist: Public Works
Case Manager: James Tong, R.C.E.
2. ENVIRONMENTAL IMPACTS, (explanations of all answers are required):
Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
3. AESTHETICS.
Would the Project:
a. Have a substantial adverse effect on a scenic vista? WHY? No scenic vistas have been designated in or around the Project area. However, the City of Pasadena's General Plan El R identifies north-facing views with the backdrop of the San GabrielMountains as an important visual resource to the City. To adequately evaluate potential changes toaesthetics, three views are discussed in this analysis: 1) Views from North Arroyo Boulevard and the Arroyo Seco Trail looking north towards the Holly Street Bridge; 2) Views from North Arroyo Boulevard and the Arroyo Seco Trail looking south towards the Holly Street Bridge; and 3) Views from Holly Streetlooking north towards the San Gabriel Mountains. The Holly Street Bridge Rehabilitation Project wouldcause three visible changes to aesthetics in the project area including minor changes to the structuralelements of the Holly Street Bridge, a more uniform concrete finish to the bridge structure, and loss of trees and other vegetation around the bridge necessary to allow adequate construction access.
Views from North Arroyo Boulevard and the Arroyo Seco Trail looking north towards the Holly Street Bridge
Currently, this view is dominated by the dense vegetation growing along the slopes of the Arroyo Secoravine and the sides of N. Arroyo Boulevard in the foreground, the Holly Street Bridge in the midground,and obstructed views of the San Gabriel Mountains in the background. Structural changes to the bridge would not be visible from this view as they would predominantly occur under the deck or between the arches and could only be seen when directly under the bridge looking up. White the spandrel columns would be wrapped in Carbon Fiber Reinforced Polymer, the wrap would be less than 1-inch thick andwould conform to the existing sauare shape of the columns. The wrap would also be painted to matchthe color of the existina/surroundina concrete. Additionally, several inches of the existing deteriorated concrete of the column bases would be removed and replaced in kind with additional reinforcement. For these reasons, the spandrel retrofit work would not be noticeable from this view. Concrete colorationwould appear more uniform and locations on the bridge where graffiti had been painted over would no longer be visible after the bridge rehabilitation is completed.
The most substantive visual change from this view would be caused by vegetation removal; however,since only vegetation would be removed directly adjacent to the bridge, it would only be observed for a Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 13 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
short time while traveling under the bridge and would be obscured by other vegetation from views furtheraway from the bridge. Vegetation removed by the project would be temporary until replacement treesand landscaping have time to grow and restore the existing condition. None of the proposed physicalchanges would substantially alter the vividness, intactness, or unity of the existing view as shown in the photo below. In addition, the primary visual elements of this view—vegetation in the foreground, thehlolly Street Bridge in the midground, and the San Gabriel Mountains in the background—would remain visible after construction.
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Views from North A.rroyo Boulevard and the Arroyo Seco Trail looking south towards the Holly Street BridgeCurrently, this view is dominated by vegetation growing along the sides of the Arroyo Seco ravine, N.
Arroyo Boulevard and the Arroyo Seco Flood Control Channel in the foreground, the Holly Street Bridge in the midground, and obstructed views of the Colorado Street Bridge in the background. Similar to the first key view, structural changes to the bridge would not be visible from this view as they would predominantly occur under the deck or between the arches and could only be seen when directly under the bridge looking up. While the spandrel columns would be wrapped in Carbon Fiber Reinforced Polymer, the wrap would be less than 1 -inch thick and would conform to the existing square shape of thecolumnsj'he wrap woyld also be painted to match the color of the existing/surrounding concrete.
Additionally, several inches of the existing deteriorated concrete of the column bases would be removed and replaced in kind with additional reinforcement. Concrete coloration would appear more uniform andlocations on the bridge where graffiti had been painted over would no longer be visible after the bridgerehabilitation is completed. hlolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 14 Potentially
Significant
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Significant
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Less Than
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The most substantive change to aesthetics from this view would be caused by vegetation removal; however, since only vegetation would be removed directly adjacent to the bridge, it would only beobserved for a short time while traveling under the bridge and would be obscured by other vegetation from views further away from the bridge. Vegetation removed by the project would be temporary until replacement trees and landscaping have time to grow and restore the existing condition. None of theproposed changes to aesthetics would substantially alter the vividness, intactness, or unity of the existing view as shown in the photo below. In addition, the primary visual elements of this view—vegetation in theforeground, the Holly Street Bridge in the midground, and the Colorado Street Bridge in the background—would remain visible after construction. '^
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Image showing a view of the existing Holly Street Bridge and North Arroyo Boulevard, looking south towards the bridge. Source: Dokken Engineering (2018).
Views from Hotly Street looking north towards the San Gabriel Mountains Currently, this view is dominated by vegetation growing along the sides of the Arroyo Seco ravine, N.
Arroyo Boulevard and the Arroyo Seco Flood Control Channel in the foreground and midground, and the Rose Bowl and San Gabriel Mountains in the background. This view does not include any of the structural changes to the bridge which can be seen from below or from the sides. Some noticeable changes would ^ / 0
section "o" bolow) and general repairs and restoration to deteriorated concrete on the deck-s^ewalksconcrete rehabilitation such as curb and gutter, sidewalk within the bridge approach slab areas andexisting pedestrian barrier. The most substantive physical change from this view would be caused byvegetation removal. Vehicles and pedestrians on the bridge would likely notice that trees had been removed around the bridge structure but would still view vegetation that ties beyond the areas where vegetation removal is anticipated. Vegetation removed by the project would be temporary until replacement trees and landscaping have time to grow and restore the existing condition. This visualchange would be more noticeable for pedestrians since vehicles would be moving fast enough to onlyobserve the difference fleetingly. In spite of this, the broader views of the San Gabriel Mountains wouldbe unchanged and minimal changes to the vista would occur. None of the proposed changes toaesthetics would substantially alter the vividness, intactness, or unity of the existing view as shown in the photo below. In addition, the primary visual elements of this view—vegetation and the Arroyo SecoHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 15 Potentially
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channel in the foreground/midground and the Rose Bowl and San Gabriel Mountains in the background—would remain visible after construction. i:
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Image showing a view of the Arroyo Seco Flood Control Channel and the City of Pasadena (looking north) from on top of the Holly Street Bridge. Source: Dokken Engineering (2018).
As a result, the Project would not result in any substantial visual or aesthetic changes to scenic vistas and would therefore have a Less than Significant Impact. No mitigation is required. b. Substantially damage scenic resources, including, but not limited to, trees, rock outcroppings, and historic buildings within a state scenic highway?
WHY? The only designated state scenic highway in the City of Pasadena is the Angeles Crest hlighway (State Highway 2), which located north of Arroyo Seco Canyon in the extreme northwest portion of the City. The Project site is not within the viewshed of the Angeles Crest Highway, and not along any scenic roadway corridors identified in the City's General Plan documents. Therefore, the proposed Project wouldhave No Impacts to state scenic highways or scenic roadway corridors. No mitigation is required.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 16 Potentially
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Significant
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Less Than
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No Impact
c. In non-urbanized areas, substantially degrade the existing visual character or quality of public views of the site and its surroundings? (Public views are those that are experienced from a publicly accessible vantage point). If the Project is in an urbanized area, would the Project conflict with applicable zoning and other regulations governing scenic quality? D
a
D
WHY? The proposed Project consists of the seismic retrofit and rehabilitation of the historic Holly Street Bridge. In general, one of the project's goals is to retain the general aesthetic of the bridge where possible to preserve the historic character of the structure. Defining aesthetic structural features that would be retained and preserved include, but are not limited to, the Neoclassical bridge design, the concrete arch, open spandrels, spandrel columns, piers, and abutments, pedestrian benches and decorative lighting built into the pedestrian barrier, as well as the cantilevered deck with decorative concrete corbels.
Structural improvements and repairs to the bridge would either be hidden from view within the existingstructure, be placed underground and out of sight, or would be visual improvements such as rehabilitationof the deteriorating and spalling exterior bridge concrete. Improvements would be made to the structurefollowing the Secretary of Interior Standards for historic bridge rehabilitation and key visual elementsshowing how the bridge was constructed in the early 20th century would be preserved. The most noticeable such feature is the patterns in the exterior concrete which was constructed using woodenboard forms and, as part of the efforts to preserve the historic character of the structure, these features would be preserved where feasible after construction. The only other substantive change to the existing bridge and views of the structure, is the proposed spandrel column retrofit which would consist of wrapping the shaft of the square columns with a Carbon Fiber Reinforced Polymer wrap. The wrap would be less than 1-inch thick and would be painted to match the existing concrete color. Additionally, severalinches of the existing deteriorated concrete of the column bases would be removed and replaced in kind with additional reinforcement, installation of a new vehicle crash barrier on the edge of existing sidewalk on the bridge deck. This crash barrier is being added to provide enhanced safety for vehicles andpedestrians using the bridge and would be a crash tested safety barrier while changing as little about theexisting concrete bridge railing as possible to preserve the historic character of the structure. Theproposed barrier would be similar to what was installed on the Colorado Street Bridge just south of the Holly Street Bridge and o photo of the Colorado Street Bridge crosh barrior is provided below. itt^i
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Image showing a view of the Colorado Street Bridge crash barrier.
A similar barrier is proposed to be added to the Holly Street Bridge In order to provide access for all construction activities, existing vegetation and trees would need to be removed prior to starting work on the bridge. An approximately 20-foot buffer of vegetation removal onHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 17 Potentially
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either side of the bridge may be needed to ensure the construction contractor can perform the bridgerepairs and rehabilitation. Specific isolated areas may need more than 20 feet such as adjacent to theexisting bridge piers which involve construction of expanded foundations. Based on a tree surveyperformed on May 1, 2019, and again on April 24, 2024, 24 mature trees (four inches diameter at breastheight) would be removed to accommodate construction access. In coordination with the constructioncontractor, tree removal may be reduced by trimming trees when feasible rather than fully removing them.
Public trees that are removed as part of this Project would be done so following the requirements of Chapter 8.52 of the City of Pasadena Ordinance regarding City Trees and Tree Protection. A moredetailed discussion of which trees will be removed, their size, type, and health is provided in Section 2-6 Biological Resources.Generally, vegetation and tree removal would be most noticeable when traveling under the bridge on N.
Arroyo Boulevard or on the Arroyo Seco Trail. The visual change associated with vegetation removal would be substantially lessened by the presence of dense vegetation in the areas surrounding the project area. As illustrated in the discussion of scenic vistas above (Part 3.a), many views of the project area would appear to have minimal changes since the areas where vegetation would be removed are obscured by other vegetated areas.
Aesthetics within the project area would also be temporarily affected by the presence of construction equipment and construction activities during construction. A construction work platform would beconstructed that would temporarily block views of the bridge from below and the access along Holly Street would be closed during a portion construction preventing access to views from the top of the bridge.
However, these changes are temporary and would be fully restored at the completion of construction.
The proposed project would result in changes to the aesthetics of the Holly Street Bridge and thesurrounding area but these changes would not substantially degrade the existing visual character orquality of public views of the site and its surroundings. By following the requirements to the tree protectionordinance, the Project would result in a Less than Significant Impact to the visual character or qualityof the site. No mitigation is required. d. Create a new source of substantial light or glare which would adversely affect day or nighttime views in the area?
n
a
WHY? The Project would not change any existing lighting from the existing condition to the proposedcondition. The luminaire lighting features on the bridge would be preserved in place and no changes to these features are proposed. No night work is anticipated during construction so temporary construction lights would not be necessary. There would be No Impact, as a result of lighting or glare and no mitigationis required.Mitigation Measures:
None required.
4. AGRICULTURAL RESOURCES.
In determining whether impacts to agricultural resources are significant environmental effects, lead agencies may refer to the California Agricultural Land Evaluation and Site Assessment Model (1997)prepared by the California Department of Conservation as an optional model to use in assessing impacts on agriculture and farmland. Would the Project.Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 18 Potentially
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a. Convert Prime Farmland, Unique Farmland, or Farmland of Statewide Importance (Farmland), as shown on the maps prepared pursuant to the Farmland Mapping and Monitoring Program ofthe California Resources Agency, to non-agricultural use? WHY? The City of Pasadena is a developed urban area surrounded by hillsides to the north and northwest. The western portion of the City contains the Arroyo Seco, which runs from north to south through the City. It has commercial recreation, park, natural and open space. The City contains no primefarmland, unique farmland, or farmland of statewide importance, as shown on maps prepared pursuantto the Farmland Mapping and Monitoring Program of the California Resources Agency. Therefore, the proposed Project would have No Impacts to Farmland. No mitigation is required. b. Conflict with existing zoning for agricultural use, or a Williamson Act contract? WHY? The City of Pasadena has no land zoned for agricultural use other than commercial growing areas.
Commercial Growing Area/Grounds is permitted in the CG (General Commercial), CL (LimitedCommercial), and IG (General Industrial) zones and conditionally in the RS (Residential Single-Family),and RM (Residential Multi-Family) districts. The use is also permitted within certain specific plan areas.
Additionally, there are no Williamson Act Contract Lands within the City of Pasadena. The Project will not be altering the zoning of any land within the Project Area. Therefore, the proposed Project would haveNo Impacts with regards to conflicts to existing zoning for agricultural use or Williamson Act contract. Nomitigation is required. c. Conflict with existing zoning for, or cause rezoning of, forest land (as defined in Public Resources Code Section 12220 (g)), timberland (as defined by Public Resources Code Section4526), or timberland zoned Timberland Production (as defined by Government Code Section 51104 (g))?
WHY? There is no timberland or Timberland Production zone in the City of Pasadena; therefore, the proposed Project would not result in the loss of forest land, timberland orTimberland Production areas.
Therefore, the proposed Project would have No Impacts with regards to forest land. No mitigation is required.
d. Result in the loss of forest land or conversion of forest land to a non-forest use? WHY? Forest land is considered large areas with native tree cover greater than 10 percent that allowsfor management of timber, aesthetics, fish and wildlife, recreation and other public benefits. While theArroyo Seco provides a natural corridor of vegetation and tree canopy through the City, it does not qualify as forest land. Therefore, the proposed Project would have No Impacts with regards to forest land. No mitigation is required.
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e. Involve other changes in the existing environment, which, due to their location or nature, could result in conversion of Farmland, to non-agricultural use, or conversion of forestland to non-forest use? D
D
WHY? There is no known farmland in the City of Pasadena; therefore, the proposed Project would not result in the conversion of farmland to a non-agricultural use. Similarly, there is not forest land or forestuse on the project site. Therefore, the proposed Project would have No Impacts with regards to conversion of farmland or forest land. No mitigation is required.
Mitigation Measures:None required.
5. AIR QUALITY.
Where available, the significance criteria established by the applicable air quality management or air pollution control district may be relied upon to make the following determinations. Would the Project:
a. Conflict with or obstruct implementation of the applicable air quality plan? WHY? The City of Pasadena is within the South Coast Air Basin (SCAB), which is bounded by the SanGabriel, San Bernardino, and San Jacinto Mountains to the north and east, and the Pacific Ocean to thesouth and west. The air quality in the SCAB is managed by the South Coast Air Quality Management District (SCAQM D).
The SCAB has a history of recorded air quality violations and is an area where both state and federal ambient air quality standards are exceeded. Because of the violations of the California Ambient AirQuality Standards (CAAQS), the California Clean Air Act requires triennial preparation of an Air QualityManagement Plan (AQMP). The AQMP analyzes air quality on a regional level and identifies region-wideattenuation methods to achieve the air quality standards over time. These region-wide attenuationmethods include regulations for stationary-source polluters; facilitation of new transportation technologies, such as low-emission vehicles; and capital improvements, such as park-and-ride facilities and public transit improvements.
The most recently adopted plan is the 30+6-2022 AQMP, adopted on March SDecember 2, 2&472022.
This plan is the SCAB'S portion of the State Implementation Plan (SIP). This plan is designed to achievethe five percent annual reduction goal of the California Clean Air Act.
The SCAQMD understands that southern California is growing. As such, the AQMP accommodates population growth and transportation projections based on the predictions made by the Southern California Association of Governments (SCAG). Thus, projects that are consistent with employment and population forecasts are consistent with the AQMP.The proposed Project would not change any of the factors associated with air pollutant emission generation in the region and would have no permanent impacts on air quality. No additional capacity is proposed (nonew lanes) and the Project would not result in any new trips, vehicle miles traveled, or vehicle hours traveledin the permanent condition. Table 1 of the Caltrans Transportation Project-Level Carbon Monoxide Protocollists specific types of projects that are exempt from all emissions analyses for determining air qualityconformity. Included in the list is "Widening narrow pavements or reconstructing bridges (no additional travelHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 20 Potentially
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lanes)". Since the Project is consistent with these requirements, the Project will not be increasing operational traffic and it is assumed to be consistent with AQMP and is exempt from local conformity review. Therefore,the Project is consistent with the AQMP, and the proposed Project would have No Impacts. No mitigation is required.
b. Result in a cumulatively considerable net increase of any criteria pollutant for which the Project region is non-attainment under an applicable federal or state ambient air quality standard (including releasing emissions which exceed quantitative thresholds for ozone precursors)? WHY? Due to its geographical location and the prevailing off shore daytime winds, Pasadena receivessmog from downtown Los Angeles and other areas in the Los Angeles basin. The prevailing winds, fromthe southwest, carry smog from wide areas of Los Angeles and adjacent cities, to the San FernandaValley and to Pasadena in the San Gabriel Valley where it is trapped against the foothills. For these reasons the potential for adverse air quality in Pasadena is high.
The California Air Resources Board (CARB) is required to designate areas of the state as attainment, nonattainment, or unclassified for any state standard. An "attainment" designation for an area signifies thatpollutant concentrations do not violate the standard for that pollutant in that area. A "nonattainment"designation indicates that a pollutant concentration violated the standard at least once within a calendaryear. The area air quality attainment status of the SCAB and the City is shown on Table 1.
Table 1: SCAQMD/Los Angeles County Attainment Status
Pollutant National Ambient Air Quality Standards Attainment Status State Ambient Air Quality Standards Attainment Status Ozone (Os) Nonattainment Nonattainment
Respirable Particulate
Matter (PMio)
Attainment Nonattainment
Fine Particulate Matter
(PM2.5)
Nonattainment Nonattainment
Carbon Monoxide (CO) Attainment AttainmentNitrogen Dioxide NOz) Attainment Attainment Sulfur Dioxide (302) Attainment AttainmentLead (Pb) Nonattainment Attainment Source: California Air Resources Board, 204&-2022 httDS://ww2.arb.ca.aov/resources/documents/maDS-state-andfederal-area-desianationshttDS://www.3rb.ca.aov/desia/adm/adm.htm Ooerational Emissions
The proposed Project is not a capacity increasing project and would not cause a change in the traffic patterns. Since there would be no change in operating conditions or lane configuration and traffic would notincrease after construction, there would be no additional regional or local air emissions and no impact on air quality. Accordingly, the proposed Project would not exceed the applicable thresholds of significance for air pollutant emissions during operation. Therefore, operation of the Project would not result in a cumulativelyconsiderable net increase in any criteria pollutant for which the Project region is in non-attainment. This would result in a Less Than Significant Impact.
Construction EmissionsConstruction activities associated with the seismic retrofit of Holly Street Bridge may result in some temporary incremental increases in air pollutants, such as ozone precursors and particulate matter due to operation of gas powered equipment and minor land disturbance. hHowever, the proposed constructionactivities would be temporary in nature and are not anticipated to generate large amounts of dust or particulates because the Project would have limited operations on bare ground. Additionally, the Project Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 21 Potentially
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would be implementing best available control measures, as required by SCAQMD Rule 403, to reduce dust and particulate spreading.The Project's construction is anticipated to take between 12 and 18 months. The Project's constructionemissions were estimated using the Roadway Construction Emissions Model by the Sacramento Metropolitan Air Quality Management District (SMAQMD 20184), which is the accepted model for all CEQAroadway projects throughout California. The Roadway Construction Emissions Model results are compared with the SCAQMD Air Quality Significance Thresholds in Table 2. As summarized in Table 2, construction activities from the Project would not exceed emission thresholds established by the SCAQMD.
Table 2: SCAQMD Road Construction Emissions Model Results Compared to SCAQMD Thresholds of Significance
Pollutant Road Construction Emissions
Model Estimates
SCAQMD Threshold
(pounds per day)
SCAQMD Localized
Significance Thresholds
for Construction1
N Ox 25SO Ibs/day 100lbs/day 98 Ibs/day
voc 3S Ibs/day 75 Ibs/day
PM10 34 Ibs/day 150lbs/day 6 Ibs/day
PM2.5 IS Ibs/day 55 Ibs/day 4 Ibs/day
SOx <1 Ib/day 150lbs/day
co 2Z3? Ibs/day 550 Ibs/day 812 Ibs/day
Lead 3 Ibs/day
Source: Modeling using the Roadway Construction Emissions Model 98.M. 0 (Sacramento Metropolitan Air QualityManagement District 20187), SCAQMD, Appendix C- Mass Rate LST Look-up Table. Accessed July 2010Februa! 2024
'Allowable emissions from site involving at least 2 acres of disturbance in SRA-8 for a receptor 25 meters away.
All construction activities would follow the SCAQMD rules and would implement all appropriate air quality BMPs, including minimizing equipment idling time and use of water or similar chemical palliative to control fugitive dust. The SCAQMD's Rule 403 Implementation Handbook would also be used to minimize effects of impacts on air quality due to construction. This handbook contains compliance guidelines for minimizing fugitive dust to protect sensitive receptors in the vicinity. With adherence to the SCAQMD's Rule 403 construction emissions would result in a Less Than Significant Impact. No mitigation is required c. Expose sensitive receptors to substantial pollutant concentrations? WHY? During construction, short-term degradation of air quality is expected from the release of particulate emissions (airborne dust) generated by excavation, grading, hauling, and other activities related to construction. Emissions from construction equipment powered by gasoline and diesel engines are also anticipated and would include CO, NOx, VOCs, directly emitted PMio and PMz.s, and toxic aircontaminants (TACs) such as diesel exhaust particulate matter. There is also a potential for release of particulate asbestos during demolition, if it is present in the existing bridge concrete. Construction activities are expected to slightly increase traffic congestion in the area, as the bridge would be closed for several months until rehabilitation of the deck is completed, for 9 months during construction, resu Iti n g in increases in emissions from traffic congestion or due to additional miles traveled using the designated detour routes. These emissions would be temporary and limited to the immediate area surrounding the construction site.Localized Construction Analysis
The nearest sensitive receptors are within 100 feet from the northwestern and southeastern Project boundaries. In addition to the SCAQMD Air Quality Significance thresholds for construction, the SCAQMD has developed Localized Significance Thresholds (LSTs). LSTs represent the maximum emissions from aHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 22 Potentially
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project that will not cause or contribute to an air quality exceedance of the most stringent applicable federal or state ambient air quality standard at the nearest sensitive receptor, taking into consideration ambientconcentrations in each source receptor area (SRA), project size, distance to the sensitive receptor, and otherapplicable criteria. LSTs have been developed for NOx, CO, PMio, PM2.5. LSTs are not applicable to mobilesources such as cars on a roadway (SCAQMD, 2003). As such, LSTs for operational emissions do notapply to onsite development as the majority of emissions would be generated by vehicle traffic on area roadways.
The SCAQMD provides lookup tables for project sites that measure one, two, or five acres. The project is located in Source Receptor Area 8 (SRA-8, West San Gabriel Valley). The nearest receptor is within 100 feet (approximately 30 meters). The maximum project area of disturbance that would occur during construction is 2 acres. Therefore, LST screening thresholds for construction on a two-acre site in SRA-8 forsensitive receptors 25 meters away were used as the most applicable thresholds and are shown in Table 2.
Emissions from construction activities associated with the seismic retrofit of Holly Street Bridge wouldnot exceed the SCAQMD's LST screening thresholds for criteria pollutants.
Toxic Air ContaminantsThe greatest potential for toxic air contaminant (TAG) emissions would be related to diesel particulateemissions associated with heavy equipment operations during grading and excavation activities. In addition, incidental amounts of toxic substances such as oils, solvents, and paints would be used duringconstruction. These substances would comply with all applicable SCAQMD rules for their manufactureand use. According to SCAQMD methodology, health effects from carcinogenic air toxics are usuallydescribed in terms of "individual cancer risk." Individual cancer risk is the likelihood that a person exposed to concentrations ofTACs over a 70-year lifetime will contract cancer, based on the use of standard riskassessment methodology. A substantial portion of construction emissions would occur down in the Arroyo Seco, would be over 200 feet from the nearest sensitive receptor and would be further separated by thedifference in grades (over 50 feet of vertical grade separation). Some construction vehicles would beoperating on the bridge deck or on the approach roadways much closer to sensitive residences, but theseactivities would be substantially less than the 18 months estimated for construction. Given the relativelyshort-term construction schedule for activities (18 months compared to 70 years) as well as proximityand distance to the nearest sensitive land uses, the proposed project would not result in a long term (i.e.,70 years) substantial source of TAC emissions. Therefore, project-related diesel particulate matter impacts during construction would not be significant.
The proposed bridge retrofit would have no permanent impact on sensitive receptors. Given the above analysis, the impact is considered to be a Less Than Significant Impact. No mitigation is required. d. Result in other emissions (such as those leading to odors) adversely affecting a substantial number of people?
WHY? Residences within or adjacent to the project area are the nearest sensitive receptors to project construction and are as close as 100 feet from the northwestern and southeastern Project boundaries.
Emissions derived from construction activities associated with the seismic retrofit of hlolly Street Bridge are anticipated to be minor and, as analyzed above, are not anticipated to exceed the SCAQMD'semission thresholds for criteria pollutants. Any odors generated by the proposed Project would be limitedto construction equipment and would occur at such low concentrations and/or for such a short duration as to not affect a substantial number of people. Project activities would not include industrial or intensiveagriculture uses. In addition, construction activities would be short-term and are not anticipated to resultin nuisance odors that would violate SCAQMD odor regulations. Therefore, the impact is considered tobe a Less Than Significant Impact. No mitigation is required.Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 23 Potentially
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Mitigation Measures:None required.
6. BIOLOGICAL RESOURCES.
Would the Project:
a. Have a substantial adverse effect, either directly or through habitat modifications, on anyspecies identified as a candidate, sensitive, or special status species in local or regional plans, policies, or regulations, or by the California Department of Fish and Game or U.S. Fish and Wildlife Sen/ice?
WHY? The Project is in a suburban portion of the City of Pasadena. The segment of the Arroyo Secothat the subject bridge spans is a concrete-lined rectangular channel with vegetated slopes above the banks of the channel. The United States Fish and Wildlife Service and California Natural DiversityDatabase do not have any records of unique, rare or endangered plant or animal species or habitats within or near the site.The habitats within the Project area include developed areas (paved roadways, dirt multi-use trail, the concrete lined Arroyo Seco Channel, and landscaped residential areas), disturbed mixed chaparral, and disturbed oak woodland. Mixed chaparral and oak woodland habitat were both identified as "disturbed"due to habitat fragmentation, extensive physical development within and surrounding the project area, andthe high percentage of non-native vegetation present. The disturbed mixed chaparral is a steep west facing slope with rocky substrate that is dominated with shrubs and very little tree cover on the east side of the Project area. Dominate species in the disturbed mixed chaparral include laurel sumac {Malosma laurina), California sagebrush (Artemisia califomica), and black sage (Salvia mellifera). The disturbed oak woodland is located on the western and southeast sides of the Project area and is comprised of coast live oak (Quercus agrifolia) and California sycamore (Platanus racemosa), with an understory of toyon(Heteromeles arbutifolia), silver wattle (Acacia delbata), and poison oak (Toxicodendron diversilobum).
Based on a records search of the California Natural Diversity Database (CNDDB), the U.S. Fish and Wildlife Service (USFWS), National Marine Fisheries Service (NMFS) and California Native Plant Society (CNPS) lists, 32 special status or sensitive wildlife species and 32 special status or sensitive plant specieshave the potential of occurring within 10 miles of the proposed Project (Appendix A - Biological DatabaseSearch Results and Appendix B - Special Status Species Table). An analysis of habitat requirements,recorded observations, and field surveys determined that three of these species have a low potential tooccur within the proposed Project—Nevin's barberry, American peregrine falcon, and coastal whiptail. Theremaining species are presumed absent.
Special-Status PlantsPrior to field surveys, a review of CNDDB, CNPS and online databases found 32 special status species with the potential to occur within 10 miles of the Project area. Surveys were conducted January 10th and March 14th, 2018 and April 24, 2024 to search for special status species and assess if potentially suitablehabitat for these species was present within the biological study area. No special status plant species wereobserved during biological surveys and all special status plant species are presumed absent from theProject area.
Based on the biological surveys and an analysis of local occurrences, it was determined that the Federally endangered Nevin's Barberry has the potential to occur within immediate area around the Project. The Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 24 Potentially
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species was not observed during the January 10th, 2018 biological survey but, at the time, was consideredto have a low potential of occurring within the proposed Project due to the presence of potentially suitable habitat and regional occurrences of the species. A-f£ollow up focused surveys for Nevin's Barberry wasconducted on March 14th, 2018 and April 24, 2024. These surveys was-were.timed to fall within the bloomperiod for Nevin's Barberry which is March - June. Survey methods included walking approximate 15 foot transacts through all potentially suitable Nevin's barberry habitat within the Project area searchingfor the species. No Nevin's Barberry were observed during the follow up surveys and the species is presumed absent from the Project area.
Special-Status Wildlife
Prior to field surveys, a search of CNDDB and USFWS online databases found 32 wildlife species with the potential to occur within the Project area. Analysis of specific habitat requirements, and analysis of both current and historical occurrences determined that American peregrine falcon (Fa/co peregrinusanatum) and coastal whiptail (Spidoscelis tighs stejnegeri) have the potential of occurring within the vicinity of the Project.
Native birds, protected under the Migratory Bird Treaty Act (MBTA) and similar provisions under CaliforniaFish and Game (CFG) code, have the potential to nest within the proposed Project area. During biological surveys, nesting birds were not identified within the vicinity of the Project, but habitat was determined to be favorable to birds that nest in tree canopies and on structures.Discussion of American Peregrine Falcon The American peregrine falcon is a medium sized bird of prey specializing in hunting other birds. The species is found on several continents but is uncommon in most places. The species naturally nests oncliffs and preys on a variety of ducks and other birds. Individuals adapt to the urban environment well bynesting and roosting on sky scrapers, tail bridges, and other structures and foraging on rock pigeons(Columba livia). The species was listed as endangered under the Federal Endangered Species Act in 1970 after populations crashed in the 1950s and 60s as a result of widespread application of the pesticideDichlorodiphenyltrichloroethane (DDT). Populations have since rebounded with the banning of DDT and the species was delisted in 1999. The species is still listed as fully protected under California Fish and Game Code.
AMERICAN PEREGRINE FALCON SURVEY RESULTS
The species was not observed during the January 10th, 2018 or April 24, 2024 field surveys. The biologicalstudy area lacks the requisite protected cliffs or ledges necessary for nesting and does not contain adequate wetland habitat preferred by the species; however, potential surrogate bridge habitat and cliffsare adjacent to the eastern portion of the BSA. There are limited CNDDB occurrences of the species in the region; however, there are numerous observations of the species within the City of Pasadena and along the Arroyo Seco recorded on eBird (eBird 2018). The species is considered to have a low tomoderate potential of occurring within the BSA based regional observations and presence of marginalhabitat.PROJECT IMPACTS TO AMERICAN PEREGRINE FALCONWith the inclusion of mitigation measures requiring pre-construction surveys (Mitigation Measure BIO-3),direct impacts to American peregrine falcon are not anticipated. Project impacts would be limited totemporary removal of potential nesting habitat on the Holly Street Bridge during construction. Therefore,with the incorporation of Mitigation Measure BIO-3 impacts to the American Peregrine falcon are lessthan significant.
CUMULATIVE IMPACTS TO AMERICAN PEREGRINE FALCON
The primary cause of American peregrine falcon decline was widespread use of DDT and other pesticides. Populations have since rebounded and individuals have become well adapted to the urbanenvironment. The proposed Project would not involve the use of pesticides and would not permanently remove potentially suitable American peregrine falcon habitat. No cumulative impacts to the species are anticipated.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 25 Potentially
Significant
Impact
Significant
Unless
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Incorporated
Less Than
Significant
Impact
No Impact
Discussion of Coastal Whiptail
The coastal whiptail is not a State or Federally listed species, but is a CDFW Species of Special Concern.The coastal whiptail is a medium sized lizard found in coastal Southern California and northern Baja California. The species is found in a variety of hot and dry ecosystems with sparse vegetation includingchaparral, woodlands, and early successional stages of riparian vegetation. Primary prey items includesmall invertebrates and lizards.
COASTAL WHIPTAIL SURVEY RESULTS
The species was not observed during the January 10th, 2018 or April 24, 2024 biological surveys; however, it was determined that potentially suitable chaparral habitat is present in the eastern and southern portions of the Project vicinity. Habitat quality has been significantly degraded by illegaldumping, human presence, invasion by invasive species, altering of the fire regime, and habitat fragmentation due to urban development. The nearest CNDDB occurrence of the species is approximately 8 miles from the Project vicinity and was recorded in 2000. Most regional occurrences in Los Angeles County are confined to the San Gabriel Mountains, the San Jose Hills, or Puente Hills.Based on presence of low-quality habitat and regional occurrences, the species is considered to have alow potential of occurring within the Project vicinity.
PROJECT IMPACTS TO COASTAL WHIPTAILWith the inclusion of pre-construction clearance surveys (Mitigation Measure BIO-4) and proper construction vehicle speed limits (Mitigation Measure BIO-5), direct impacts to the species are notanticipated. Project impacts would be limited to temporary disturbance of potentially suitable chaparralhabitat. Therefore, with the incorporation of Mitigation Measures BIO-4 and BIO-5 impacts to the coastal whiptail are less than significant.
CUMULATIVE IMPACTS TO COASTAL WHIPTAILThe Project would temporarily disturb an isolated remnant of chaparral habitat that historically covered much of the region. With the inclusion of Mitigation Measures BIO-4 and BIO-5, direct impacts to the species are not anticipated. The Project would not contribute to the long-term loss of habitat that caused populations to decline.Migratory Birds and Other Birds of PreyNative birds, protected under the MBTA and similar provisions under CFG code, have the potential to nest within the Project vicinity. During biological surveys, habitat within the Project vicinity was determined to be favorable to canopy, cavity, and structural nesting birds (such as swallows); however, none of thesebirds were observed and no evidence of them using the Project area in the past was observed. To avoidand minimize potential construction related impacts to migratory birds and raptors, Mitigation MeasureBIO-3 would be implemented.
Bats
Bats, protected under CFG Code, may be present within the Project vicinity. During the January 10th, 2018 and April 24, 2024 biological surveys, the Holly Street bridge was assessed for evidence of bat habitation. No sign of bat habitation (i.e. guano, urine staining) were observed but bats may be present within the Project vicinity prior to construction. To avoid and minimize potential Project related impacts to bats, Mitigation Measure BIO-6 would be implemented. With the implementation of this mitigationmeasures, the proposed Project would have no significant impact on bats.
ConclusionImplementation of Mitigation Measures BIO-1 through BIO-6 would reduce impacts to special-status species to a less than significant level. Therefore, impacts to special-status species are considered to beSignificant Unless Mitigation is Incorporated.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 26 Potentially
Significant
Impact
Significant
Unless
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Less Than
Significant
Impact
No Impact
b. Have a substantial adverse effect on any riparian habitat or other sensitive natural community identified in local or regional plans, policies, and regulations or by the California Department of Fish and Game or U.S. Fish and Wildlife Service?
WHY? Although the project will have impacts to the disturbed oak woodland and disturbed mixed chaparral habitats, these are not identified by the US Fish and Wildlife Service, California Department ofFish and Wildlife (CDFW California Natural Diversity Database, 2018), or the City of Pasadena (General Plan Open Space and Conservation Element) as sensitive natural communities. Therefore, there wouldbe No Impactsio riparian habitat or other sensitive natural communities. No mitigation is required. c. Have a substantial adverse effect of federally protected wetlands as defined by Section 404 of the Clean Water Act (including, but not limited to, marsh, vernal pool, coastal, etc.) through direct removal, filling, hydrological interruption, or other means? WHY? Drainage courses with definable bed and bank and their adjacent wetlands are "waters of the United States" and fall under the jurisdiction of the U.S. Army Corps of Engineers (USAGE) in accordance with Section 404 of the Clean Water Act. Jurisdictional wetlands, as defined by the USAGE are landsthat, during normal conditions, possess hydric soils, are dominated by wetland vegetation, and are inundated with water for a portion of the growing season.
The only jurisdictional water feature within the Project vicinity is the Arroyo Seco Channel. The ArroyoSeco Channel has a watershed of approximately 47 square miles (mi2) originating in the San Gabriel Mountains to the north and terminating at the confluence with the Los Angeles River. The Devil's Gate flood control structure was constructed along the Arroyo Seco in 1920 and most of the downstreamalignment of the Arroyo Seco Channel was concrete lined over the following decade. Flow regimes have been greatly altered from an ephemeral flash flood prone system to a moderated perennial system. No work would be conducted within the Arroyo Seco Channel. A temporary platform (or similar physical barrier) would be constructed under the Holly Street bridge to prevent any construction related debris from entering the channel. No impacts to the Arroyo Seco Channel would occur and no mitigation measuresare required. d. Interfere substantially with the movement of any native resident or migratory fish or wildlife species or with established native resident or migratory wildlife corridors, or impede the use ofnative wildlife nursery sites? D
D
WHY? The Arroyo may function as a north-south wildlife corridor as it provides free access under several major highways and other local roads. The Project is intended to retrofit and rehabilitate the Holly StreetBridge and would not result in any substantive permanent changes to the Project area that would result in a barrier to migration or wildlife movement. There is an unchannelized section of the Arroyo Secoapproximately 400 feet to the south of the Project area which was stocked with Arroyo Chub fish species in 2008. However, the Arroyo Seco is comprised of a concrete channel above and below this segment,including the area within the Project Area. With typically low or zero flow seasonal periods, there is littlepotential for fish migration into the Project area. Lastly, as the Project would not have any construction activity within the Arroyo Seco Flood Control Channel, and best management practices would beimplemented to prevent construction related debris from entering the channel, the Project would notHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 27 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
interfere with the movement of any native resident or migratory fish, should any exist in the involved segment of the Channel (which is not expected).Construction activities would be temporary and would occur during daylight hours. Terrestrial wildlife, inareas surrounded by urban development, typically migrate at night and therefore would have the opportunity to pass through areas temporarily subject to construction during nighttime hours. The Project would not prevent the movement wildlife species or interfere with established native resident or migratorywildlife corridors. Migratory birds would be protected by the implementation of BIO-3. Additionally, BIO-7would protect nesting habitat outside of the Project area by placing high-visibility fencing on the edge ofthe Project area to preventing inadvertent construction activities from occurring outside of the Project area.
Therefore, the Project's impact in this regard is Significant Unless Mitigation is Incorporated. e. Conflict with any local policies or ordinances protecting biological resources, such as a tree preservation policy or ordinance?
WHY? The only local ordinance protecting biological resources in the City of Pasadena is Ordinance No. 6896 "City Trees and Tree Protection Ordinance". This ordinance was set forth with the goal of protecting landmark, native, and specimen trees so that the tree canopy cover in the City is preserved and expanded. There are hundreds of trees within the Project area, with the majority focused along the slopes of the Arroyo Seco. The trees observed within 100 feet of the Project area consist of a bay laurel, bluegum, California buckeye, California sycamore, canyon live oak, Chinese elm, coast live oak, common fig,date palm, deodar cedar, hackberry, holly leaved cherry, Mexican fan palm, redwood, silver dollar gum,silver wattle, Sydney golden wattle and tree of heaven. The staging areas do not contain tree species.
In order to provide access for all construction activities, existing vegetation and trees would need to beremoved prior to starting work on the bridge. An approximately 20-foot buffer of vegetation removal on either side of the bridge may be needed to ensure the construction contractor can perform the bridge repairs and rehabilitation. Specific isolated areas may need more than 20 feet such as adjacent to the existing bridge piers which involve construction of expanded foundations. Based on preliminaryengineering, an estimated 24-35_mature trees (four inches diameter at breast height) are expected to be removed to accommodate construction access (see Figure 6). Table 3 provides detailed information oneach tree that will be removed, including a reference number to the location of the tree on Figure 6, thespecies of the tree, the diameter of the tree at breast height, and the health of the tree.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 28 Tree Locations (Tag Number)
0 Proposed Trees to Remain
Proposed Trees to Remove
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Proposed Tree Removals (Construction Access and Infrastructre Improvements) BRLO-5064(078)
Holly Street Bridge Seismic Retrofit and Rehabilitation Project City of Pasadena, Los Angeles County, California
0 Feet
0 25 50 75 100
Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
Table 3: Holly Street Bridge Tree Removal
Tag
Number Scientific Name Common Name
2866 Ailanthus altissima Tree of hleaven2867 Quercus agrifolia Coast Live Oak2868 Platanus racemosa California Sycamore2869 Platanus racemosa California Sycamore 2870 Platanus racemosa California Sycamore
2871 | Platanus racemosa \ California Sycamore3269 | Quercus agrifolia Coast Live Oak 3270 | Quercus agrifolia Coast Live Oak3272 ] Quercus agrifolia Coast Live Oak 3273 I Malosma laurina Laurel sumac
3277 Platanus racemosa California Sycamore
3279 I Malosma laurina Laurel sumac3281 I Acacia dealbata Silver Wattle3282 I Acacia dealbata Silver Wattle 3284 Platanus racemosa3285 Acacia dealbata
California SycamoreSilver Wattle
32943296
Sambucus mexicana ] Elderberry
Cedrus deodara Deodar Cedar
3297 Cedrus deodara Deodar Cedar3298 Cedrus deodara Deodar Cedar3299 4865
Quercus agrifolia Coast Live Oak
4949
Quercus agrifolia Coast Live OakCedrus deodara Deodar Cedar 4950 Cedrus deodara Deodar Cedar4951 Cedrus deodara Deodar Cedar 4952 Platanus racemosa \ California Sycamore
4971 | Acacia longifolia Sydney Golden Wattle4973 I Acacia dealbata Silver Wattle4974 I Acacia dealbata Silver Wattle4975 ] Acacia dealbata Silver Wattle 4976 Acacia dealbata Silver Wattle4977 Acacia dealbata Silver Wattle4978 Acacia dealbata Silver Wattle 4979 Unknown Unknown4980 Quercus aghfolia Coast Live Oak DBH
(inches)
19 12
43 88
19 8
9 6
5 32
5 44
36 6
20 14
18 2021
11 2325
15 32
4 96445
446
Health
Good
Good
Poor
Good
Good
Poor
Poor
Good
GoodGood
Poor
Fair
Poor
Fair
Poor
GoodGood
Fair
PoorPoor
GoodGood
GoodGoodGood
Poor
GoodGood
GoodGoodGoodGood
GoodGoodGood
The City intends to coordinate with the bridge designer and construction crew to minimize tree removalwherever possible, and when feasible, trees would be trimmed rather than fully removed. Public treesthat are removed as part of this Project would be done so following the requirements of Chapter 8.52 of the City of Pasadena Ordinance regarding City Trees and Tree Protection. By following the requirements Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 30 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
to the tree protection ordinance, the Project would result in a Less than Significant Impact to biological resources. No mitigation is required.
f. Conflict with the provisions of an adopted Habitat Conservation Plan (HOP), Natural Community Conservation Plan (NCCP), or other approved local, regional, or state habitat conservation plan?
WHY? Currently, there are no adopted Habitat Conservation or Natural Community Conservation Planswithin the City of Pasadena. There are also no approved local, regional or state habitat conservation plans. The Project would not conflict with any such plan and would therefore have No impacts.
Mitigation Measures:BIO-1: Construction personnel shall attend biological awareness training provided by a City approved Project Biologist prior to working within the Project area. The biological awareness training shallinclude a description of special status species and habitats and provide direction to construction workers if any special status species are observed during construction.
BIO-2: If any special status wildlife is encountered during the course of construction, work within the vicinity of the wildlife shall stop. Work in the vicinity of the wildlife shall not re-commence untilthe wildlife has been relocated by a qualified biologist, or has left the construction area of its own volition. The City, or a City representative, shall contact CDFW to determine the mostappropriate methods of relocation.
BIO-3: If vegetation removal or initial work on the super structure of the bridge is to take place during the nesting season (February 1st - August 31st), a pre-construction nesting bird survey must beconducted within 1 week prior to the start of construction. The survey must include all vegetation and potentially suitable structures within the Project vicinity plus a 100-foot buffer. If constructionpauses during nesting season for longer than 1 week, another nesting bird survey is requiredbefore work can be re-initiated during the nesting season.
A minimum 300 foot no-disturbance buffer would be established around any active nests of raptor species. A 100 foot no-disturbance buffer would be established around any active nests for other migratory birds. If an active nest is discovered during construction, the contractor must immediately stop work in the nesting area until the appropriate buffer is established. Thecontractor is prohibited from conducting work that could disturb the birds (as determined by the Project biologist and in coordination with wildlife agencies) in the buffer area until a qualifiedbiologist determines the young have fledged. A reduced buffer can be established if determined appropriate by the Project biologist and approved by CDFW.
BIO-4: Within 24 hours prior to the start of construction, the Project biologist shall survey chaparral habitats within the Project area for presence of coastal whiptail. The surveys shall be conductedby walking 5 meter (a15 foot) transects and pausing periodically to scan the surrounding exposed soils with binoculars for presence of the species. If coastal whiptail is discovered duringthe pre-construction survey, a protective 50-foot no-work buffer shall be established aroundeach sighting. The Project biologist shall then contact CDFWto determine appropriate active or passive relocation methods.
BIO-5: Off road construction vehicles must be operated at or below 5 miles per hour while working within potential coastal whiptail habitat. Vehicles used for the initial clearing and grubbing of Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 31 Potentially
Significant
Impact
Significant
Unless
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Incorporated
Less Than
Significant
Impact
No Impact
within potential coastal whiptail habitat must be operated at maximum speeds of 3 miles per hour.
BIO-6: Within 1 week prior to the start of construction, a bat survey must be completed. The survey must include a visual inspection of the bridge structure and any trees that would be removed for signs of bat occupation (i.e. urine staining, accumulation of guano). If evidence of bat occupation is observed, the City shall contact CDFW to determine appropriate protective measures.
BIO-7: The outer boundaries of the construction area in proximity to chaparral and mixed oak woodland habitat shall be fenced with high visibility fencing to prevent construction equipment, construction personnel, or construction debris from impacting the habitat outside of the Projectarea.
7. CULTURAL RESOURCES.
Would the Project:
a. Cause a substantial adverse change in the significance of a historical resource as defined in CEQA Guidelines Section 15064.5?
D
D
D
WHY? There are three historical resources within the Project area; Holly Street Bridge, the Arroyo Seco Flood Control Channel, and the Pasadena Arroyo Parks and Recreation Historic District. The Pasadena Arroyo Parks and Recreation Historic District is listed on the National Register of Historic Places (NRHP), while the other properties are not listed, but considered to be eligible for the NRHP. These resources are all eligible for listing on the California Register of Historical Resources (CRHR).Arroyo Parks and Recreation District (National Register #08000579 and P-19-190590). The district is significant under Criterion A/1 at the local level in the context of parks and recreation, with a period of significance of 1909-1939. It was listed in the NRHP on May 21, 2008 and subsequently listed in the CRHR. The district has a status code of 1S. The historic district boundary spans the Lower and Central Arroyos in Pasadena, roughly bounded by the Foothill Freeway on the north, the Pasadena city limits onthe south, Arroyo Boulevard on the east, and San Rafael and Linda Vista Avenues on the east. In thevicinity of the Project APE, the contributing elements of the district include: the circulation system, inclusive of roads, bridges (Holly Street Bridge [Bridge #530-1041]), and trails; and the arroyo stoneretaining walls and steps. The non-contributing elements in the vicinity of the Project APE include the Arroyo Seco Flood Control Channel (which is individually eligible).
Holly Street Bridge (Bridge #530-1041). The Holly Street Bridge over the Arroyo Seco Flood ControlChannel in Pasadena is included as a contributor to the NRHP-listed Arroyo Parks and Recreation District (listed May 21, 2008) and subsequently included in the CRHR. It is significant within the context of thehistory of Pasadena's parks and recreation under Criterion A/1. It is also listed in the Caltrans Historic Bridge Inventory as a Category 2, indicating that it was determined individually eligible for listing in theNRHP on October 19, 1986, and was subsequently listed in the CRHR. It is significant under Criterion C/3 as a distinctive example of its type, period and method of construction. The Holly Street Bridge(Bridge #530-1041) was also previously identified within the Multiple Property Listing for "Early Automobile-Related Properties in Pasadena (1897-1944) as potentially individually eligible for listing inthe NRHP within the context of "Roadways and Bridges (1899-1944)." It may be significant within this context under both Criteria A/1 and C/3.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 32 Potentially
Significant
Impact
Significant
Unless
Mitigation isIncorporated
Less Than
Significant
Impact
No Impact
It is assumed that the period of significance for the bridge is 1923-1924, the date of construction. It is assumed that the boundary for the bridge includes the footprint of the bridge as shown on the APE map (Figure 7). The character-defining features of the bridge were not identified in the bridge survey nor in the NRHP Nomination for the Arroyo Parks and Recreation District. It is assumed that the characterdefining features include: the Neoclassical design, board-formed, poured-in-place concrete features andfinish, including, but not limited to, the arch, the open spandrels, the spandrel columns, the piers, and the abutments, pedestrian benches between piers, cantilevered deck with decorative concrete corbels,channel-jointed piers, arch rings, segmental arches, struts, and decorative imposts at the spandrelcolumns, the original curbs and sidewalks, poured stone streetlight standards, bridge railings (includingbalustrades and parapets, span length, and bridge height.
Arroyo Seco Flood Control Channel (P-19-186859). This linear property was determined eligible for listing in the NRHP on June 4, 2004 and subsequently listed in the CRHR. The Arroyo Seco Flood ControlChannel is significant under Criterion A, at the local level for its association with significant events in the Los Angeles Basin, allowing for unimpeded development along the banks of the river and allowing for the construction of the Arroyo Seco Parkway. The period of significance spans from 1931 to 1947. The status code for the channel is 2S2. The boundary of the linear property follows the 10-mite masonry-linedchannel, varying in width from 25 to 80 feet.A survey of historic-era structures within the Area of Potential Effect (APE) was conducted by architectural historians Amanda Duane, Emily Rinaldi, and Laura O'Neill on January 23 and February 6, 2018. Theyconfirmed the presence of the three historical resources described above and evaluated two additional structures within the APE for listing on the NRHP and CRHR. The property at 276 Linda Vista Avenuewas determined to not be eligible for listing on the NRhlP or CRHR, white the property at 701 West Holly Street, constructed in 1926, was eligible for listing on the NRHP and CRHR as it is locally significant asan excellent and rare example of French Eclectic building style under Criterion C/3.Potential Impacts to Historic Properties In general, a significant effect under CEQA would occur if a project results in a substantial adverse change in the significance of a historical resource as defined in CEQA Guidelines Section 15064.5(a).CEQA Guidelines Section 15064.5(b)(1) defines substantial adverse change as "physical demolition,destruction, relocation, or alteration of the resource or its immediate surroundings such that thesignificance of a historical resource would be materially impaired." According to CEQA Guidelines Section 15064.5(b)(2), the significance of a historical resource is materially impaired when a project demolishes or materially alters in an adverse manner those physical characteristics that:
A. Convey its historical significance and that justify its inclusion in, or eligibility for, inclusion in the California Register; or
B. Account for its inclusion in a local register of historical resources pursuant to section 5020.1(k) of the Public Resources Code or its identification in a historical resources survey meeting therequirements of section 5024.1(g) of the Public Resources Code, unless the public agencyreviewing the effects of the project establishes by a preponderance of evidence that theresource is not historically or culturally significant; or C. Convey its historical significance and that justify its eligibility for inclusion in the California Register as determined by a Lead Agency for purposes of CEQA.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 33 I I Indirect Area of Potential Effects I. w tf
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BRL0.5064(078)
Holly Street Bridge Seismic Retrofit and Rehabilitation Project City of Pasadena, LosAngetes County, California
Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
In general, a project that complies with the Secretary of the Interior's Standards for the Treatment ofHistoric Properties with Guidelines for Preserving, Rehabilitating, Restoring, and Reconstructing HistoricBuildings (Standards) is considered to have mitigated its impacts to historical resources to a less-thansignificant level (CEQA Guidelines Section 15064.5(b)(3).
Arroyo Parks and Recreation DistrictThe proposed construction activities that have the potential to affect the Arroyo Parks and Recreation District include: the rehabilitation of the Holly Street Bridge, grading on the slopes adjacent to the Arroyo Seco Flood Control Channel to accommodate vegetation removal and a-temporary construction access rea4, two temporary construction structures, and construction staging areas (SG2, SG3, and SG4).
In the areas of proposed grading, the slope of the hills would be altered, and vegetation removed to accommodate a-temporary construction vehicular access road.
Twe-^ne.temporary structures (i.e., temporary platform) to facilitate construction would be built within the boundaries of the Arroyo Parks and Recreation District_. The first is Q temporary aocess bridgo raisod platform to facilitate construction traffic across the Arroyo Seco Flood Control ChannQl. The temporarvplatform would be built either adjacent to or suspended from the Hollv Street Bridge to provide access toperform work on the bridge itself. If not suspended from the bridge itself, the platform The temporaryaccess bridge raised platform would be built utilizing a support structure of piles or abutments, located outside the channel but within the district. After the piles or abutments are in place, a temporary bridgedeck would be installed on top of the support structures, spanning over the channel. The secondtemporary structure would be a temporary platform built either adjacent to or suspondod from the hlolly Street Bridge to provide ooooss to perform work on the bridgG itsotf.
The construction staging areas would be used for storage of materials and equipment and may betemporarily fenced off to restrict access.
Construction Grading
The project calls for grading of slopes within the boundary of the Arroyo Parks and Recreation district (Figure 4). Although the project calls for grading and removal of vegetation to accommodate constructionvehicle access, the change would not destroy or damage any part of the property's contributing features.Although it would change the physical features within the district, it would not change any contributing resources nor any character-defining features.
The minor change to grading and vegetation would not diminish any aspects of the Arroyo Parks and Recreation District's integrity. The proposed grading would not cause a substantial adverse change in the significance of the Arroyo Parks and Recreation District.
Temporary Structures
The project calls for the construction of a temporary platform adjacent to the Holly Street Bridge andtemporary raised platform over the Arroyo Seco channel, betti-within the boundaries of the Arroyo Parks and Recreation District. This activity is temporary and does not have the potential to permanently affect the historic property. The temporary structures would not damage or destroy any of the historic property's contributing resources. Although the proposed work is within the boundaries of the district, no contributing features would be altered nor would the property be removed from its historic location. This activity would not result in a permanent change in use nor would it introduce permanent, new features within the settingof the district. This activity would not introduce any new and permanent visual, atmosphere or audibleelements to the district. Finally, the temporary structures would not cause neglect of the historic property nor would it cause a change in ownership.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 38 Potentially
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No Impact
The temporary structures would not diminish any aspects of the Arroyo Parks and Recreation District's integrity. The proposed temporary structures would not cause a substantial adverse change in thesignificance of the Arroyo Parks and Recreation District.
Construction Staging
The project calls for construction staging in three areas within the Arroyo Parks and Recreation District.The proposed staging areas are currently undeveloped areas between roadways and the Arroyo Seco Flood Control Channel that are not formally landscaped. These areas do not have any elements that contribute to the district. Construction staging is temporary and does not have the potential to affect the historic property. The temporary construction staging would not damage or destroy any of the historicproperty's contributing resources. No contributing features would be altered nor would the property beremoved from its historic location. This activity would not result in a permanent change in use nor would it introduce permanent, new features within the setting of the district. This activity would not introduceany new and permanent visual, atmosphere or audible elements to the district. Finally, the temporaryplatform would not cause neglect of the historic property nor would it cause a change in ownership.
The temporary construction staging would not diminish any aspects of the Arroyo Parks and Recreation District's integrity. The temporary construction staging would not cause an adverse effect on the ArroyoParks and Recreation District.
Holly Street Bridge
The project calls for the following activities to seismically retrofit and rehabilitate the Holly Street Bridge.
Except where noted in italics below, all proposed activities have the potential to affect historic properties that thoro is no potential for an offect (in italics bolow).
Deck RehabilitationReplacomont. The project calls forrehabilrtatmg_replacing the existing deck with a methacrvlate treatment and polyester concrete overlay, including removing the concrete deck slab, repairing concrete spalling on the deck girders and cross beams, andLinstalling additional below-slab reinforcement (not visible), and installing a new cast concrete deck slab that is similar to the original dock slab.
The bridge deck has not been identified as a character-defining feature. Because the work on the deck repairs or replaces in-kind existing non-conthbuting elements, this construction activity does not have potential to affect the Holly Street Bridge.
Spall Repair and Crack Injection. Repairing cracked and spalled concrete on all structural bridge features by removing weakened concrete around the crack, injecting epoxy grout into thecracks and repairing/replacing the board formed and bonded grout treatments where aestheticallyappropriate.Supplemental Traffic Barrier. The project calls for installing crash rated interior barriers at theedge of the sidowolk, adjacent to the lanes of vehicle travel to protect pedestrians, vehicles, and the original barrier.
Retrofit Pier Caps. The projoot calls for increasing the pier strength and ductility by reinforcing the interior pier caps.
Joint RehabilitationRoplacomont and Strongthoning. The project calls for replacing andstrengthening the joints by cleaning and/or replacina adding new joint seals to prevent water intrusion and subsequent concrete spallingi and adding new pipe and cable shear keys to limit future seismic displacement. Concrete diaphragms would be constructed to conceal the pipe and cable shear keys. Expansion joints and an internal shear key would bo placed within both bridgepier caps.Spandrel Columns Retrofit and Partial ReplacementeohHnn Strengthening. The projectcalls for repair to spanclrel columns to correct seismic vulnerability. Spandrel column retrofit wouldconsisLQLwm£oin.q the shaft of the square columns with a Carbon Fiber Reinforced Polymer wrap. The wrap would be less than 1-inch thick and would be painted to match the existing Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 39 Potentially
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concrete color. Additionally, several inches of the existing deteriorated concrete of the columnbases would be removed and replaced in kind with additional reinforcement.strengthening thecolumns by filling in the existing hollow concrete columns with additional reinforced concrete toincroaso column ductility and strength. Tho columns arc currontly hollow and would bo filled in from the top while the deck is removed).
This work would not bo visible and moroly fills an existing void within tho columns. This activity doos not hove tho potontial to affoct tho Holly Stroot Bridge.
Archway Stiffening. The project calls for stiffening and bracing the archway by adding concretestrut beams between the archways (note that the now strut booms would have a board formed concrete finish similar to the existing board formed concrete elements of the bridge).
Archway Retrofit. The project calls for retrofitting the arches by removing 2 to 6 inches of the existing deteriorated concrete to the existing rebar, installing new additional rebar that would beheld in place with by bolts placed in drilled holes and bonded with epoxy, and reinstalling a layerof new board formed concrete around the new rebar.Micropilo Hold-Downs. The projoct calls for adding micropilo hold downs bolow grade adjacent to the bridge columns and abutments. To install the micropile hold downs, the ground surroundingthe existing piers and thrust blocks would be excavated to approximately 15 feet below grade.After GXCQvation, the micropilGG (3 to 10 inches in diamotor) would bo installed to a depth of about 50 feet below the original grade. The tops of the micropiles would be located within the area ofprevious excavation (but below the original grade). Steel rebar would be partially drilled into theexisting thrust blocks. Concrete would be poured, encasing the tops of the micropiles and the newrebar, tying the system together. The concrete would be backfilled with soil and the landscaperestored to the pro construction condition.
This activity would bo bolow grade and doos not havo tho potential to affoot tho Holly Stroot Bridge.
Temporary Scaffolding. To provide access for construction, the project calls for the installation of temporary scaffolding to provide access to the bridge elements.
Utility Mains. The project calls for accommodating utility mains, should they become necessary, within the replacement deck to include additional ducts (conduit, or a simple void in the concrete).
This activity would be embedded within the new deck and does not have the potential to affect the Holly Street Bridge.
Spa// Repair and Crack Injection
In areas of spall, the deteriorated concrete would be repaired by removing damaged material andpatching with new concrete that duplicates the old in material properties (strength, porosity, permeability, etc.), composition, color, and texture. In areas with a smooth concrete finish, the repairs would match the adjacent finish (see photos below). Similarly, in areas of board-formed concrete, the patch would be finished with boards to match the adjacent finish. The board-formed concrete finish is a most significant character-defining feature of the Holly Street Bridge. The material itself, the concrete, is ubiquitous andcan be replaced in-kind if it matches the existing concrete's material properties (strength, porosity, permeability, etc.), composition, color, and texture.Repair of cracks and spalls is critical for the long-term preservation of the bridge. To minimize the deterioration of the reinforcing materials embedded in the concrete, the steel rebar, water infiltration must be minimized. Repairing existing cracks and spalls would help reduce ongoing corrosion of the steel, which leads to subsequent spalling.The repair of cracks and spalls with a structural epoxy grout strengthens the existing concrete, which helps address the structural deficiencies of the structure.
According to the Rehabilitation Guidelines, the recommended approach for repairing historic masonryfollows:
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 40 Potentially
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Repairing masonry by patching, splicing, consolidating, or otherwise reinforcing the masonryusing recognized preservation methods. Repair may include the limited replacement in kind or with a compatible substitute material of those extensively deteriorated or missing parts of masonryfeatures when there are surviving prototypes, such as terra-cotta brackets or stone balusters.
To ensure that the project follows this guideline, a series of mockups would be prepared on the bridge toensure that the method of patching the spalls ensures satisfactory bonding. The mockup is also critical to ensure that the new materials match the existing, character-defining concrete in terms of material properties (strength, porosity, permeability, etc.), composition, color, and textures. A qualifiedarchitectural historian or architectural conservator shall inspect and approve the mockups prior to fullscale implementation for spall or crack repair. These requirements are part of the Secretary of Interior'sStandards for the Treatment of Historic Properties Action Plan that has been prepared for the project. Acomplete list of these commitments is provided in measure CUL-1 (Table 4). ^
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Image showing cracking and spalling (with exposed
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Existing cracks in the concrete would be repaired using an epoxy grout that would match the adjacent concrete in color. The cracks would be prepared and grout injected according to the manufacturer'sspecifications, ensuring that the grout does not stain the surface of the concrete. For narrow cracks, nopatch would be applied after the epoxy cures. Wide cracks would be patched using the samemethodology as the spall repairs after the epoxy cures. To ensure that the project follows theseguidelines, a series of mockups would be prepared on the bridge to ensure that the crack repair methodology is minimally visible and matched the bridge in terms of color and sheen. Theserequirements are part of the Secretary of Interior's Standards for the Treatment of Historic Properties Action Plan that has been prepared for the project. A complete list of these commitments is provided in measure CUL-1 (Table 4).Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 41 Potentially
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Less Than
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No Impact
This construction activity calls for the repair of deteriorated historic features, rather than replacement.The spall and crack repairs would follow the Secretary of the Interior's Rehabilitation Standards andwould not cause an adverse direct effect on Holly Street Bridge.
Supplemental Traffic Barrier
The existing bridge railing acts as a traffic barrier but does not meet current crash rotingo. Rather than replacing the existing most significant character defining bridge railing with a new reinforced concrete railing, the project calls for installing new crash rated interior barriers at the inside edge of the sidewalk, adjacent to the lanes of vehicle travel to protect pedestrians, vehicles, and the original character-defining barrier. Although a new addition to the historic bridge, the proposed railing would be designed to minimizeits appearance. The proposed railing would be constructed of unembellished steel, approximately 3 feet tail with pooto spaood at 5 foot intervals. The proposed railing would bo attached to the sidewalk, whichwas identified as a significant charactor defining foQturo. The proposed railing would minimally blockviews of the bridge railings.According to the Rehabilitation Guidelines, the recommended approaohoo for life safoty oodos follows:
Complying with life safety codes (including rGquiromGnts for impact resistant glazing, security,and seismic retrofit) in such a manner that the historic building's character defining exterior features, interior spaces, features, and finishes, and features of the site and setting are preserved or impacted as little as possible.
To meet the purpose and need for the project, it is necessary to ensure that the bridge has a traffic barrier that meets current crash test ratings. Although possible to remove the existing railing and install a replicated, reinforced conoroto stool barriQr, that would rGquiro the wholesale removal of a most significant character defining feature. Instead, the installation of a supplemental traffic barrier has the benefit of retaining the existing railings while protecting pedestrian and vehicular traffic. Although thesupplemental traffic barrier would remove a small amount of historic materials from the sidewalk, a verysmall porcontago of the overall material would be removed. With this approach, both the existing railingand the sidewalk would be physically impacted as little as possible.
The proposed supplemental traffic barrier could also be characterized as a new addition to the bridge.Although written specifically about buildings, the guiding principles for additions are also applicable to the addition of a new railing to a historic bridge:
New additions should be designed and constructed so that the character defining features of thehistoric building, its site, and setting are not negativGly impactod. Generally, a now addition ohouldbe subordinate to the historic building. An addition should be compotiblo but differentiated enough so that it is not confused as historic or original to the building. The same guidance applies to new construction so it does not nogativoly impact the historic charactQr of the building or its site.
The proposed supplemental traffic barrier would bo visually unobtruoivo ond socondary to the original, neo-classical barrier. With its low height and relative openness, the proposed barriers would onlyminimally obscure the views of the original railing. Finally, the proposed supplemental traffic barrier wouldbe easily differentiated from the original, character defining barrier.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 42 Potentially
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Image showing the existing crash barrier on the Colorado Street Bridge Similar to what is proposed for the Holly Street Bridge.
Retrofit Pior Caps
The project calls for increasing the pier strength and ductility by reinforcing the interior pier caps. After deck removal, tho existing concretG pier caps would bo removed and replaced with new steel reinforced A.
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Annotated view of the bridge showing locations of proposed work, view facing west. Source: Dokken Engineering (2018).
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 43 Potentially
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Pipe and cable shear keys to be
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Annotated view of the bridge showing locations of proposed work, view facing southeast. Source: Dokken Engineering (2018).
The project calls for replacing and strengthening the joints rehabiNtati^n_by cleaning and/or replacing adding now joint seals to prevent water intrusion and subsequent concrete spalling and adding new pipeand cable shear keys to limit future seismic displacement. Expansion joints and an internal shear key would be placed within both new bridge pier caps. This activity primarily replaces existing, non-characterdefining joint sealers in-kind and would not be visible. However, theThe new pipe and_cable_shear keyswould be embedded within the new concrete diaphragms. The proposed pipejind^able shear keys would not be visible as_they_afl4-would be integrated into the new interior pier capsconcrete diaphragms. This construction activity would not cause an adverse effect on any of the bridge's character-defining features nor would it cause an adverse effect on the overall appearance of the bridge.
Spandrel Columns Retrofit and Partial Replacement
The project calls for repair to spandrel columns to correct seismic vulnerability. Spandrel column retrofitwould consist of wrapping the shaft of the square columns with a Carbon Fiber Reinforced Polymer wrap.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 44 Potentially
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The wrap would be less than 1-inch thick and would be painted to match the existing concrete color.Additionally, several inches of the existing deteriorated concrete of the column bases would be removed and replaced in kind with additional reinforcement. The concrete would be board-formed to match theexisting aesthetic. /The proposed Carbon Fiber Reinforced Polymer wrap would add a new material to the historic bridge that would be difficult to differentiate from the original spandrel materials; however, the original materials would be preservedJrLOlace^eneath the wrap. The wrap would also not signjficantlv alter the overallappearance of the column as the wrap is less than 1-inch in thickness, would conform to the existingsquare column dimensions, and would be painted to match the existing concrete coloration. Althoughconsidered a new material, the wrap would preserve the existing structural system and within the contextof a Neoclassical desiflrUUs^ more appropriate to preserve the existing structural system by utilizing materials and design compatible with the historic materials, size, scale, and Droportion. Differentiating the wrap from the ^riflinaLconcrete would be far more visually disruptive. Similarly, the proposed treatment to replace existing deteriorated concrete from the column bases with board-formed in kind concrete would also be less visually disruptive for the bridge's Neocolassical design. For these reasons, the proposed improvements to the spandrel columns would not cause a substantial adverse change tothe significance of the Holly Street Bridae and would remain consistent with the Secretary of the Interior's Standards for the Treatment of Historic Properties with Guidelines for Preserving, Rehabilitating, Restoring, and Reconstructing hlistoric Buildin.qs,
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The Holly Street Bridge spandrel columns, view facing south. Source: Dokken Enaineerina (2020).
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 45 Potentially
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The Holly Street Bridge spandrel columns view facing northwest. Source: Dokken Enaineehna (2019).
Arohway Stiffening
Temporary Structures Retrofit
Due to the bridge's elevation and the steep topography, in order to access the necessary areas of the bridge to perform the retrofit, a_platform& from the bridge and/or scaffolding from below would be temporarily installed to complete the project. A qualified architectural historian shall inspect and approvethe contractor's methodology for installing temporary scaffolding and platforms to ensure that it would not damage the bridge. AsJ:?he temporary scaffolding and platforms would be installed in a manner that would not permanentlvdamaoe the structure and as the scaffoldino and platform would be removed after retrofit of the bridge has been completed, these temporary construction structures would not cause an adverse effect on the Holly Street Bridge. The requirement for architectural historian inspection andapproval is_part of the Secretary of Interior's Standards for the Treatment of Historic Properties Action Plan that has been prepared for the project. A complete list of these commitments is provided in measure CUL-1 (Table 4).
Arroyo Seco Flood Control ChannelThe project has little potential to affect the Arroyo Seco Flood Control Channel. Construction of thetemporary platform and temporary access bridge raised platform over the Arroyo Seco Flood Control Channel afe-is_the only proposed activityies with the potential to affect the Arroyo Seco Flood ControlChannel. The temporary QCGQGS bridge raisod platform would bo built utilizing a support structuro of pilos or abutments, located outside the physical boundarios of the Arroyo Seco Flood Control Channel. After the piles or abutments are in place, Q temporary bridge deck would be installed on top of the support structures, spanning over the channel. The temporary bridge would have lateral and vertical clearancearound the Arroyo Seco Flood Control Channel with no potential for a direct effect. The temporaryplatform would similarly be constructed outside the boundaries of the channel but would also span over the channel.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 46 Potentially
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Mitigation for Historic Properties
In order to ensure that project activities do not result in significant impacts to historic resources present in the project area, a Secretary of Interior's Standards for the Treatment of Historic Properties Action Plan was prepared in June of 2019. Table 4 provides a summary of the commitments the City of Pasadena has made to mitigate potential environmental to a less than significant level. Implementation of mitigation measure CUL-1 would ensure the Action Plan is followed throughout construction. As a result, impacts to historic properties are considered Less than Significant Unless with Mitigation is-lncorporated. b. Cause a substantial adverse change in the significance of an archaeological resource pursuant to Section 15064.5?
WHY? There are no known prehistoric or historic archeological sites on the Project site. However, the Project involves grading into previously undisturbed soils. A record search did not reveal anyarchaeological resources within the APE. The pedestrian field survey conducted on November 28, 2017by archaeologist, Amy Dunay, did not result in the identification or recordation of any prehistoric culturalresources, nor did it identify artifacts or any indication of buried deposit(s).
However, there is always the potential that previously undiscovered archaeological deposits could beuncovered during construction. Therefore, adherence to Mitigation Measures CU^2GR-4- and CR-2 and TCR-3 in Section 2.18 would ensure the Project would not cause a substantial adverse change inthe significance of an archaeological resource. Impacts in this regard are Significant Unless Mitigationis Incorporated. c. Disturb any human remains, including those interred outside of dedicated ceremonies? D ^ D D
WHY? There are no known human remains on the site. The Project site is not part of a formal cemetery and is not known to have been used for disposal of historic or prehistoric human remains. Thus, human remains are not expected to be encountered during construction of the proposed Project. In the unlikely event that human remains are encountered during Project construction, adherence to Mitigation Measure TCR-3, which references State Health and Safety Code Section 7050.5 and Section 5087.94of the Public Resources Code, requires the Project to halt until the County Coroner has made thenecessary findings as to the origin and disposition of the remains pursuant to Public Resources CodeSection 5097.98. Compliance with these regulations would ensure the proposed Project would not resultin significant impacts due to disturbing human remains.Section 5097.94 of the Public Resources Code and Section 7050.5 of the California Health and SafetyCode protect Native American burials, skeletal remains and grave goods, regardless of age and providemethod and means for the appropriate handling of such remains. If human remains are encountered, work should halt in that vicinity and the county coroner should be notified immediately. At the same time, an archaeologist should be contacted to evaluate the situation. If the human remains are of Native American origin, the coroner must notify the Native American Heritage Commission within 24 hours of such identification. Further provisions of PRC 5097.98 are to be followed as applicable. Less-than with Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 47 Potentially
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Mitigation Measures:CUL-1: The City of Pasadena, in coordination with the California Department of Transportation, shall implement the Secretary of Interior's Standards for the Treatment of Historic Properties Action Plan. Proper implementation requires actions be taken prior to the start of construction, during construction, and after the completion of construction and are outlined in Table 4: Summary of the Historic Resources Action Plan.
Table 4: Summary of Historic Resources Action Plan
Stage Responsible Parties Task Date Complete
Definition of Responsible Party acronyms are: CAH - Caltrans Architectural Historian2; CS - City Staff; PM - Caltrans Project Manager; PE - Project Engineer; RE - Resident Engineer. The primary responsible party in each task is noted with an *. /Plan DevelopmenVConstructionDocuments CAM,CS,PM*, PE
PM, PE, and CS will provide project plans for bridge at65%, 95%, and 100% completion to CAH for review.
Plan Development/ConstructionDocuments
CAH*, CS,PM.PE
CAH will review the plans for compliance with theRehabilitation Standards and work with the PM, PE,andCS to resolve any outstanding issues.
Plan DevelopmenVConstructionDocuments
CAH*, CS CAH will provide formal approval in the form of a memo.
Plan DevelopmenVConstructionDocuments
PM,PE, RE* The SOIS Action Plan will be included in the Resident Engineer's Pending File.
Plan Development/ConstructionDocuments
CAH* CAH will ensure that the SOIS Action Plan will be
included in the Environmental Commitments Record(ECR).
Plan DevelopmenVConstructionDocuments
CAH* CAH will review and approve any proposed project
changes to the historic property's character-definingfeatures to ensure that the changes are consistent withthe SOIS Action Plan.
Pre-Construction/Construction
CAH,CS,PM*, PE
All responsible parties will agree to an on-site monitoringschedule in accordance with the construction scheduleprior to the start of construction.
Pre-Construction/Construction
CAH,CS,PM*, PE
All responsible parties will agree on a methodology forinstalling the scaffolding and platforms, to ensure thathistoric properties are not damaged.
Pre-Construction/Construction
CAH,CS,PM*, PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Mock-up inspection of concrete spall and crack
repair
Pre-Construction/Construction
CAH,CS,PM*, PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Mock-up inspection of the board-formed concrete
finish for the concrete strut beams
Pre-Construction/Construction
CAH,CS,PM*, PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Steel rebar installation methodology
2 Caltrans may elect to have a qualified consultant conduct some of its monitoring responsibilities. In this case, Caltrans PQS would review and approve the consultant's work.
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Stage Responsible Parties Task Date Complete
Pre-Construction/Construction
CAH,CS,PM*, PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Mock-up inspection of the board-formed concrete
finish over the steel rebar
Pre-Construction/Construction
CAH* CAH will review and approve any proposed project
changes to the historic property's character-definingfeatures to ensure that the changes are consistent withthe SOIS Action Plan.
During Construction CAH, CS,
PM*, RE
CS, PM, and RE will notify CAH in advance when eventsin the SOIS Action plan requiring monitoring will occur(including but not limited to those listed in the PreConstruction/Construction Stage, above).
During Construction CAH", CS.
PM, RE
CAH will be present to monitor required constructionevents and will prepare monitoring reports summarizingactivities, results, and next actions.
Post-Construction CAH,CS,
PM*, RE
CS, PM, and PE will notify CAH when construction iscomplete.
Post-Construction CAH,CS,
PM*, RE
CAH will investigate the finished bridge to ensure thatall work was completed according to the plans and thatit complies with the Standards for Rehabilitation.
Post-Construction CAM*, CS,
PM,RE
All responsible parties will work together to resolveoutstanding issues. CAH will provide formal approval inthe form of a memo.
CUL-2: If cultural resources are discovered during construction projects in Pasadena that may be eligible for listing in the California Register for Historical Resources, all ground disturbingactivities in the immediate vicinity of the find shall be halted until the find is evaluated by a Registered Professional Archaeologist. If testing determines that significance criteria are met, then the Project shall be required to perform data recovery, professional identification, radiocarbon dates as applicable, and other special studies; and provide a comprehensive finalreport including site record to the City and the South Central Coastal Information Center at California State University Fullerton. No further grading shall occur in the area of the discovery until Planning Department approves the report.
8. ENERGY.
Would the proposal:
a. Result in potentially significant environmental impact due to wasteful, inefficient, or unnecessary consumption of energy resources, during Project construction or operation? WHY? The proposed Project would not create any new permanent demand for energy. Construction ofthe Project would result in a short-term increase in consumption ofoil-based energy products associatedwith construction equipment and a minor increase in vehicle miles traveled associated with a detour routewhile the bridge is closed. However, the additional amount of resources used would not cause a significant reduction in available supplies and would not be wasteful or inefficient. The Project would haveNo Impact on the use of non-renewable resources. No mitigation is required. b. Conflict with or obstruct a state or local plan for renewable energy or energy efficiency? Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 49 Potentially
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Impact
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No Impact
a D D
In order to promote energy conservation, the City has adopted an amended California Green Building Standards Code (14.04.500). Since the Project only involves retrofit and rehabilitation of an existingbridge and would not result in any new sources of energy usage, it would not conflict with the CaliforniaGreen Building Code or any other adopted energy conservation plan. No Impacts associated with energyusage are anticipated. No mitigation is required.
Mitigation Measures:None required.
9. GEOLOGY AND SOILS.
Would the Project:
a. Expose people or structures to potential substantial adverse effects, including the risk of loss, injury, or death involving:
/'. Rupture of a known earthquake fault, as delineated on the most recent Alquist-Pholo Earthquake Fault Zoning Map issued by the State Geologist for the area or based on othersubstantial evidence of a known fault? Refer to Division of Mines and Geology SpecialPublication 42. a D
WHY? According to the 2002 adopted Safety Element of the City of Pasadena's General Plan, the San Andreas Fault is a "master" active fault and controls seismic hazard in Southern California. This fault is located approximately 21 miles north of Pasadena.
The County of Los Angeles and the City of Pasadena are both affected by Alquist-Priolo Earthquake Fault Zones. Pasadena is in four USGS Quadrants, the Los Angeles, and the Mt. Wilson quadrants weremapped for earthquake fault zones under the Alquist-Priolo Act in 1977. The Pasadena and Condor PeakUSGS Quadrangles have not yet been mapped per the Atquist-Priolo Act.
These Alquist-Priolo maps show only one Fault Zone in or adjacent to the City of Pasadena, the Raymond (Hill) Fault Alquist-Priolo Earthquake Fault Zone. This fault is located primarily south of City limits,however, the southernmost portions of the City tie within the fault's mapped Fault Zone. The 2002 SafetyElement of the City's General Plan identifies the following three additional zones of potential fault rupturein the City:
The Eagle Rock Fault Hazard Management Zone, which traverses the southwestern portion of the City;
The Sierra Madre Fault Hazard Management Zone, which includes the Tujunga Fault, the North Sawpit Fault, and the South Branch of the San Gabriel Fault. This Fault Zone is primarilynorth of the City, and only the very northeast portion of the City and portions of the Upper Arroyo lie within the mapped fault zone.A Possible Active Strand of the Sierra Madre Fault, which appears to join a continuation ofthe Sycamore Canyon Fault. This fault area traverses the northern portion of the City as is identified as a Fault Hazard Management Zone for Critical Facilities Only.
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The Project site is not within any of these potential fault rupture zones. The closest mapped fault zone,the Eagle Rock Fault Zone, is 1 mile south from the Project site. Therefore, the proposed Project would not expose people or structures to potential substantial adverse effects caused by the rupture of a known fault. No Impacts would result from the proposed Project. No mitigation is required. //". Strong seismic ground shaking?
D
WHY? See 9.a.i. Since the City of Pasadena is within a larger area traversed by active fault systems, such as the San Andreas and Newport-lnglewood Faults, any major earthquake along these systems would cause seismic ground shaking in Pasadena. Much of the City is on sandy, stony or gravelly loam formed on the alluvial fan adjacent to the San Gabriel Mountains. This soil is more porous and loosely compacted than bedrock, and thus subject to greater impacts from seismic ground shaking than bedrock.
The purpose of the Project is to seismically retrofit the Holly Street Bridge. These retrofits would be conducted according to all applicable codes and are subject to inspection during construction.Conforming to these required standards would ensure the proposed Project would result in Less ThanSignificant Impacts due to strong seismic ground shaking. No mitigation is required. ///'. Seismic-related ground failure, including liquefaction (as delineated on the most recent Seismic Hazards Zones Map issued by the State Geologist for the area or based on othersubstantial evidence of known areas of liquefaction)? D ^
WHY? The Project is located within a Liquefaction Hazard Zone and Landslide Hazard Zone as shown on Plate P-1 of the 2002 Safety Element of the General Plan. This Plate was developed considering theLiquefaction and Earthquake-lnduced Landslide areas as shown on the State of California SeismicHazard Zone maps for the City. The Project is the seismic retrofit of the existing Holly Street Bridge. Thepurpose of the Project is to increase the bridge's ability to survive a large seismic event. Therefore, theseismic retrofit of the bridge would not cause additional exposure to substantial adverse effects due toseismic related ground failure or liquefaction. In addition, the proposed project would not exacerbate thepotential for seismic-related ground failure or liquefaction, nor would the project exacerbate the potentialeffects of such seismic events. Impacts in this regard are considered Less Than Significant Impact.
No mitigation is required.
iv. Landslides (as delineated on the most recent Seismic Hazards Zones Map issued by the ' State Geologist for the area or based on other substantial evidence of known areas of landslides)?
WHY? The Project site is located within a Landslide hlazard Zone as shown on Plate P-1 of the 2002 Safety Element of the General Plan. This Plate was developed considering the Earthquake-lnducedLandslide areas as shown on the State of California Seismic Hazard Zone maps for the City. The Projectis the seismic retrofit of the existing Holly Street Bridge. The purpose of the Project is to increase thebridge's ability to survive a large seismic event and reduce potential loss of life due to said events.
Therefore, the seismic retrofit of the bridge would not cause additional exposure to substantial adverse effects due to seismic related landslides. In addition, the proposed project would not exacerbate the Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 51 Potentially
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potential for landslides, nor would the project exacerbate the potential adverse effects of landslides.Impacts in this regard are considered Less Than Significant Impact. No mitigation is required. b. Result in substantial soil erosion or the loss of topsoil? D
^
WHY? Soil erosion can occur through many different processes, but for the proposed Project, it is most likely to occur during the construction phase when bare soil is exposed to moving water or wind. Erosion could adversely affect adjacent properties as well as the Arroyo Seco drainage. However, best management practices (BMPs) would be implemented during construction in compliance with NationalPollutant Discharge Elimination System (NPDES) permit requirements. Construction BMPs could include sandbag barriers, straw bale barriers, sediment traps, and fiber rolls to stabilize soils; hydraulic mulch, hydroseeding, and geotextiles to control sediments; portable water and straw mulch for wind erosioncontrol; street sweeping and entrance/outlet tire washing; and vehicle and equipment cleaning, concrete waste management, and contaminated soil management. Implementation of required BMPs, as requiredthrough the NPDES permit, would reduce the potential for adverse soil erosion impacts.The natural water erosion potential of soils in Pasadena is low, unless these soils are disturbed duringthe wet season. Both the Ramona and Hanford soils associations, which underlay much of the City, have high permeability, low surface runoff and slight erosion hazard due to the gravelly surface layer and low topographic relief away from the steeper foothill areas of the San Gabriel Mountains.
Water erosion during construction would be minimized by limiting construction to dry weather, coveringexposed excavated dirt during periods of rain and protecting excavated areas from flooding withtemporary berms. Soil erosion after construction would be controlled by implementation of an approved landscape and irrigation plan. This plan is required to be submitted to the Building Division for review and approval prior to the issuance of a building permit. The displacement of soil through cut and fill would becontrolled by Chapter 33 of the 2016 California Building Code relating to grading and excavation.
Construction may temporarily expose the soil to wind and/or water erosion. Erosion caused by strong wind, excavation and earth moving operations would be minimized by watering during construction and by covering earth to be transported in trucks to or from the site, as required to comply with SCAQMD Rule 403.
Overall, the Project impacts would be Less Than Significant. No mitigation is required. c. Be located on a geologic unit or soil that is unstable, or that would become unstable as a result of the Project, and potentially result in on- or off-site landslide, lateral spreading,subsidence, liquefaction or collapse? WHY? The proposed Project lies in a sloping area of the A/royo Seco. Plate 2-4 of the Technical Background Report to the 2002 Safety Element shows this area to have a Slope Instability Rating ofHigh. The Project is the seismic retrofit of the existing Holly Street Bridge. The purpose of the Project is to increase the bridge's ability to survive a large seismic event and reduce potential loss of life due to said events. Therefore, the seismic retrofit of the bridge would not cause additional exposure tosubstantial adverse effects due to seismic related landslides, lateral spreading, subsidence, liquefactionor collapse. The result is a Less Than Significant Impact. No mitigation is required. hlolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 52 Potentially
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d. Be located on expansive soil, as defined in Table 18-1-B of the Uniform Building Code (1994), creating substantial risks to life or property?
WHY? The bridge abutments are supported by abutments and piers on consolidated bedrock. Therefore, expansive soils, if present, have no potential for an adverse effect on the Project. No /mpacf would result from the proposed Project. No mitigation is required.
e. Have soils incapable of adequately supporting the use of septic tanks or alternative wastewater disposal systems where sewers are not available for the disposal of wastewater? D
a
WHY? The proposed Project would not use a septic tank system. Therefore, No Impact on soils relatedto the use of septic tanks would occur. No mitigation is required. f. Directly or indirectly destroy a unique paleontological resource or site or unique geologic feature?
WHY? The Project site lies on the valley floor in suburban portion of the City of Pasadena. This portion of the City does not contain any unique geologic features and is not known or expected to containpaleontological resources. Therefore, the proposed Project would not destroy a unique paleontologicalresource or unique geologic feature, and would result in No Impacts. No mitigation is required.Mitigation Measures:
None required.
10. GREENHOUSE GAS EMISSIONS.Would the Project:Setting
While climate change has been a concern since at least 1988, as evidenced by the establishment of the United Nations and World Meteorological Organization's Intergovernmental Panel on Climate Change(IPCC), the efforts devoted to greenhouse gas (GHG) emissions reduction and climate change researchand policy have increased dramatically in recent years. These efforts are primarily concerned with the emissions of GHG related to human activity that include 002, CH4, NOX, nitrous oxide,tetrafluoromethane, hexafluoroethane, sulfur hexafluoride, HFC-23 (fluoroform), HFC-134a (s, s, s, 2 -tetrafluoroethane), and HFC-152a (difluoroethane).
In 2002, with the passage of Assembly Bill 1493 (AB 1493), California launched an innovative and proactive approach to dealing with greenhouse gas emissions and climate change at the state level. AB 1493 requires the CARB to develop and implement regulations to reduce automobile and light truck greenhouse gas emissions. These stricter emissions standards were designed to apply to automobilesand light trucks beginning with the 2009-model year; however, in order to enact the standards CaliforniaHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 53 Potentially
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needed a waiver from the EPA. The waiver was denied by the EPA in December 2007 and efforts tooverturn the decision had been unsuccessful. See California v. Environmental Protection Agency, 9th Cir. Jul. 25, 2008, No. 08-70011. On January 26, 2009, it was announced that EPA would reconsidertheir decision regarding the denial of California's waiver. On May 18, 2009, President Obama announcedthe enactment of a 35.5 mpg fuel economy standard for automobiles and light duty trucks which will takeeffect in 2012. On June 30, 2009 EPA granted California the waiver. U.S. EPA's authority to regulate GHG emissions stems from the U.S. Supreme Court decision in Massachusetts v. EPA (2007). TheSupreme Court ruled that GHGs meet the definition of air pollutants under the existing Clean Air Act and must be regulated if these gases could be reasonably anticipated to endanger public health or welfare.Responding to the Court's ruling, U.S. EPA finalized an endangerment finding in December 2009. Based on scientific evidence it found that six GHGs constitute a threat to public health and welfare. Thus, it isthe Supreme Court's interpretation of the existing Act and EPA's assessment of the scientific evidencethat form the basis for EPA's regulatory actions.
U.S. EPA in conjunction with the National Highway Traffic Safety Administration (NHTSA) issued the firstof a series of GHG emission standards for new cars and tight-dutv vehicles in April 20103 and significantly 'increased the fuel economy of all new passenger cars and light trucks sold in the United States. Thestandards required these vehicles to meet an average fuel economy of 34.1 miles per gallon by 2016. In August 2012, the federal government adopted the second rule that increases fuel economy for the fleet of passenger cars, light-duty trucks, and medium-duty passenger vehicles for model years 2017 andbeyond to average fuel economy of 54.5 miles per gallon by 2025. Because NHTSA cannot set standards beyond model year 2021 due to statutory obligations and the rules' long timeframe, a mid-term evaluationis included in the rule. The Mid-Term Evaluation is the overarching process by which NHTSA, EPA,and ARB will decide on CAFE and GHG emissions standard stringency for model years 2022-2025. NHTSA has not formally adopted standards for model years 2022 through 2025. However, the EPA finalized itsmid-term review in January 2017, affirming that the target fleet average of at least 54.5 miles per gallonby 2025 was appropriate. In March 2017, President Trump ordered EPA to reopen the review andreconsider the mileage target.4NHTSA and EPA issued a Final Rule for "Phase 2" for medium- and heavy-duty vehicles to improve fuel efficiency and cut carbon pollution in October 2016. The agencies estimate that the standards will save up to 2 billion barrels of oil and reduce C02 emissions by up to 1.1 billion metric tons over the lifetimes of model year 2018-2027 vehicles.
Presidential Executive Order 13783, Promoting Energy Independence and Economic Growth, of March 28, 2017, orders all federal agencies to apply cost-benefit analyses to regulations of GHG emissions andevaluations of the social cost of carbon, nitrous oxide, and methane.On June 1, 2005, Governor Arnold Schwarzenegger signed Executive Order S-3-05. The goal of thisExecutive Order is to reduce California's GHG emissions to: 1) 2000 levels by 2010, 2) 1990 levels by the 2020 and 3) 80 percent below the 1990 levels by the year 2050. In 2006, this goal was further reinforced with the passage of Assembly Bill 32 (AB 32), the Global Warming Solutions Act of 2006. AB32 sets the same overall GHG emissions reduction goals while further mandating that CARB create aplan, which includes market mechanisms, and implement rules to achieve "real, quantifiable, costeffective reductions of greenhouse gases." Executive Order S-20-06 further directs state agencies tobegin implementing AB 32, including the recommendations made by the state's Climate Action Team.Senate Bill 32 (SB-32) is a California Senate bill expanding upon AB-32 to reduce GHG emissions. SB32 requires that there be a reduction in GHG emissions to 40% below the 1990 levels by 2030. SB-32 was contingent on the passing of Assembly Bill 197, which increased legislative oversight of CARB and 3 ]httD://www.c2es.org/federal/executive/eDa/ereenhouse-eas-reeulation-faa 4httD://www.nbcnews.com/business/autos/trumD-rolls-back-obama-era-fuel-economv-standards-n734256 and httDS://www.federalreeister.eov/documents/2017/03/22/2017-053 16/notice-of-intention-to-reconsider-the-finaldetermination-of-the-mid-term-evaluation-of-ereenhouseHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 54 Potentially
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is intended to ensure CARB must report to the legislature. AB-197 was signed into law on September 8, 2016.
With Executive Order S-01-07, Governor Schwarzenegger set forth the low carbon fuel standard for California. Under this executive order, the carbon intensity of California's transportation fuels is to be reduced by at least 10 percent by 2020.
According to Recommendations by the Association of Environmental Professionals on How to Analyze GHG Emissions and Global Climate Change in CEQA Documents (March 5, 2007), an individual projectdoes not generate enough GHG emissions to significantly influence global climate change. Rather, global climate change is a cumulative impact. This means that a project may participate in a potential impactthrough its incremental contribution combined with the contributions of all other sources of GHG. In assessing cumulative impacts, it must be determined if a project's incremental effect is "cumulativelyconsiderable." See CEQA Guidelines sections 15064(i)(1) and 15130. To make this determination the incremental impacts of the Project must be compared with the effects of past, current, and probable future projects. To gather sufficient information on a global scale of all past, current, and future projects in order to make this determination is a difficult if not impossible task.
CARB 20222e4^-Climate Change Scoping PlanAs part of its supporting documentation for the 2017 2022 ClimatQ ChQnao Scoping Plan for Achieving Carbon Neutrality, CARB released an updated version of the GHG inventory for California (Jy4y December 144, 2&4-?2023). Figure 7 is a graph from that update that shows the total GHG emissions for California for 204^2021.
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.11%-Electricity / IN SIWT'E
9%- 3% - N,0 5%. HGWP 22% • Industrial CH,
83% - CO39% • Transportation
£ a
5% • Electricity
IMPORTS8% • Agriculture
& Forestry
6% • Commercial
8% • Residential
429.4 MMTCO^e
2016 TOTAL CA EMISSIONS
SSI.SMMTCO^e
2021 TOTAL CA EMISSIONS
10%. Electricity !N STATE
23%. Industrial 6% • Electricity IMPORTS
8% • Agriculture
7% • Residential
ii
5%• Commercial
^•<1%-Not Specified
41% -Transportation
429.4 MMTCO^e
2016 TOTAL CA EMISSIONS
I
Figure 7. California Greenhouse Gas Inventory
Taken from: httDS://ww2.arb.ca.aov/aha-inventorv-datahttDS://www.arb.ca.aov/cc/inventorv/data/data^rti:n City of Pasadena 2017 Climate Action Plan
In recognition of the statewide efforts to reduce GHG emissions, the City of Pasadena adopted a Climate Action Plan in 2017. According to the Climate Action Plan Initial Study/Negative Declaration, the largest sources of greenhouse gas emissions within the City of Pasadena are from transportation (52 percent)and from commercial/industrial energy use (31 percent). The Climate Action Plan was adopted pursuantto a detailed analysis of potential project impacts under CEQA. The City of Pasadena has determinedthat projects that are consistent with the adopted Greenhouse Gas Reduction Plan would have a lessthan significant impact with regard to the Project's GHG emissions and contributions to climate change.Would the Project:
a. Generate greenhouse gas emissions, either directly or indirectly, that may have a significant impact on the environment?
hlolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 56 Potentially
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b. Conflict with any applicable plan, policy or regulation of an agency adopted for the purpose of reducing the emissions of greenhouse gases?
D D
WHY?
Construction Emissions
Construction activities associated with the seismic retrofit of Holly Street Bridge may result in some temporary greenhouse gas emissions. The on-site construction equipment for proposed Project is anticipated to emit 1,101 metric tons of GHG during construction (Table 5).
Table 5: Construction 002 Emissions Compared to Threshold of Significance Greenhouse Gas Road Construction Emissions Model Estimates (metric tons/year) U.S. EPA Threshold (metric tons/year) C02 1.064404- 75,000
Source: Modeling using the Roadway Construction Emissions Model 9S.M.O (Sacramento Metropolitan Air Quality Management District 2017). https://www.eDa.aov/sites/production/files/2015-12/documents/ahQDermittinaauidance.pdf Although the proposed Project would contribute to GHG levels during construction, these activities would only have short-term, negligible GHG emissions as a result of the construction equipment and worker vehicles. Furthermore, the proposed Project would adhere to measure T-6.1 of the City of Pasadena Climate Action Plan, which would limit construction equipment vehicle and equipment idling time,encourage the use of electrically powered or alternatively fueled construction vehicles and equipment,and require utilization of equipment with Best Available Control Technology or alternative fuels.
Adherence to Measure T-6.1 is a supportive measure to the goal of reducing overall GHG emissions andwould not hinder the City's ability to implement the goals contained within the CARB 20172021 Climate Change Scoping Plan nor the City of Pasadena 2017 CAP. As such, by maintaining consistency with theCity's Climate Action Plan, the project would also be consistent with the CARB Climate Change Scoping Plan.
The proposed project is listed in the Final Approved 2017 Federal Transportation Improvement Programas Project #5064(078). An Air Quality Conformity Determination from the Federal Highway Administration (FHWA) and Federal Transit Administration (FTA) is required to ensure that alt air quality conformityrequirements have been met. SCAG received approval of the air quality conformity determination for the 2017 FTIP from the FHWA and FTA on December 16, 2016. As a project of the 2017 FTIP, the proposed project is included in the regional air quality analysis done for the 2017 FTIP and adheres to all regionalair quality conformity requirements. Therefore, relative to greenhouse gas emissions, the proposed Project would result in a Less Than Significant Impact.
Operational Emissions
GHG emissions produced during operations are those that result from potentially increased trafficvolumes or changes in automobile speeds. The proposed Project is not a capacity increasing project and would not cause a change in the traffic patterns. Since there would be no change in operating conditions or lane configuration and traffic would not increase after construction, there would be no operational impacts related to GHG emissions.Mitigation Measures:
None required.Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 57 Potentially
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11. HAZARDS AND HAZARDOUS MATERIALS.A Hazardous Waste Initial Site Assessment was prepared for the Holly Street Bridge Rehabilitation Project in March of 2019. This assessment identified several Recognized Environmental Conditions which are discussed in Sections 2.11.a-b below.
Would the Project:
a. Create a significant hazard to the public or the environment through the routine transport, use or disposal of hazardous materials?
b. Create a significant hazard to the public or the environment through reasonably foreseeable upset and accident conditions involving the release of hazardous materials into theenvironment? n
D
WHY? The following sections discuss hazardous materials that have been identified as potentially being present in the project area.
Asbestos
Based on the age of Holly Street Bridge (built in 1925), there is a potential that asbestos-containingmaterial may be present in the superficial material and bearing pads of the existing bridge structure, concrete railings, or other materials used in bridge construction. Abatement of asbestos is required inaccordance with South Coast Air Quality Management District Rule 1403. Under the federal asbestos NESHAP, 40 CFR § 61 , Subpart M incorporated into California air quality regulations by California Healthand Safety Code Section 39658(b)(1) and in compliance with NESHAP regulations, a certified asbestosconsultant (CAC) must make definitive conclusions regarding the presence of asbestos containingmaterial. To comply with these requirements, the contractor must hire a CAC to conduct the testing prior to construction. Since bearing pad testing is a sacrificial process, it is expected that testing will be performed by the contractor prior to starting work on the bridge. Measure HAZ-1 requires the City or itscontractor to perform this testing prior to demolition of any bridge components. Should any asbestoscontaining material be detected, mitigation measure HAZ-1 also provides requirements to ensure these hazardous materials are adequately remediated through disposal at an appropriate waste facility.
Asbestos has historically been used in the fabrication of wet utility pipes, either as fibers mixed with concrete, or as an insulating material wrapped around the pipe. Relocation of existing utilities is generallythe responsibility of the utility company who would be required to test for asbestos containing materials prior to removal or relocation of any facilities. If, however, the City of Pasadena is responsible forrelocation of the gas line or any existing utility pipes, additional testing for asbestos should be conductedprior to work on the utility lines. Measure HAZ-8 specifies this requirement should the City be theresponsible party for relocation of gas or wet pipe utilities prior to construction.
Lead
Ongoing testing by Caltrans throughout California has shown that aerial deposited lead (ADL) exists insoil along major highway routes due to vehicle exhaust containing lead from the combustion of leadedgasoline. The concentrations and distributions of lead are commonly found in the upper 2 feet of soil. The concentrations and distribution of ADL in soil are determined by variables including highway age and traffic volumes. The current bridge inspection reports list the average daily traffic (ADT) at approximately 7,453 vehicle trips per day (Caltrans 204^2020). A review of historic topographic maps and aerials donot provide any indication that the ADT along Holly Street, Linda Vista Avenue, and North Arroyo hlolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 58 Potentially
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Boulevard was higher in the past, so it is unlikely that ADL in hazardous concentrations is present adjacent to the roadways in the Project area. However, in order to ensure ADL is not present in hazardousconcentrations in the Project area, the City would perform soil testing on exposed soil adjacent to hlollyStreet and North Arroyo Boulevard where ground disturbing activities would occur. This testing is required as part of Measure HAZ-2. If the testing reveals potentially hazardous concentrations of ADL, MeasureHAZ-2 also requires the preparation of a Lead Compliance Plan prior to the start of construction.Based on the age of the bridge, there is a potential that lead-based paint may be present in the aggregatematerial of the existing bridge structure, pipe coverings, and/or in the pavement paint (e.g., thermoplasticpavement marking which can also contain chromium). Unless testing can prove otherwise, yellow stripingis assumed to contain concentrations of lead and chromium at hazardous levels. Remediation of leadpaint is required in accordance with the South Coast Air Quality Management District Rule 1403 prior to demolition. Measures HAZ-3 requires the City or its contractor to perform testing of all bridge paint and pavement paint prior to starting work on the bridge. If testing identifies any areas of existing paint with hazardous concentrations of lead, mitigation measure HAZ-3 also provides requirements to ensure thepaint is adequately remediated through disposal at an appropriate waste facility.
Volatile Organic Compounds and Perchlorate
Approximately 3.5 mile to the north at 4800 Oak Grove Drive, Pasadena, CA 91109, NASA'S Jet Propulsion Laboratory (JPL) is known to have detected the presence of volatile organic compounds(VOCs) and perchlorate within the groundwater through monitoring wells. Additional monitoring wells were installed between 1990 and 2004 surrounding the JPL to monitor potential off-site groundwater contamination, including one monitoring well (MW-25) which was installed near the Rose Bowl andsunset reservoir, approximately 1-mile northeast of the Holly Street Bridge. Review of the JPL Final Record of Decision for the Operable Unit 1 On-Facility Groundwater and the Operable Unit 3 Off-Facility Groundwater (NASA 2018) indicates perchlorate contamination has been detected at MW-25, which iseither traveling downgradient from JPL, or are introduced from other nonpoint sources such as theColorado River. Perchlorate and VOCs are primarily considered a hazard to people when ingested andare of greatest risk when they are introduced into a water supply that is used for drinking water. Due to the potential for VOC and/or perchlorate contamination to be present in groundwater within the Project area, a site investigation would be performed for any locations where excavations would reach a depthof a minimum of 15 feet below ground surface (bgs) and where the project is expected to encountergroundwater during construction. This testing is required as part of Measure HAZ-4 and HAZ-5. If testingencounters groundwater and detects hazardous concentrations of VOCs or perchtorate, mitigation measure HAZ-4 also provides requirements to ensure VOCs and perchlorate are adequately containedon-site, or remediated through disposal at an appropriate waste facility.Polychlorinated Biphenyl Four pole-mounted electrical transformers were observed within the project area on the east side of the bridge. Electrical transformers frequently contain polychlorinated biphenyl (PCB) which are a group ofman-made organic chemicals that do not readily break down in the environment and can cause negativehealth effects on plants, wildlife, and humans that come in contact with them. As a standard practice, electrical transformers should be inspected for leaking prior to starting construction on a project wherethey are nearby and if any leaking is detected additional remediation may be required. Measure HAZ-6 requires the City or its contractor to inspect all electrical transformers in the project area prior to the startof construction, and if leaks are detected, develop a testing and remediation plan to ensure PCBs aresafely remove and disposed at an appropriate waste disposal facility.Treated Wood Utility PolesSeveral overhead utility poles are present in the project area and construction activities could result in the need to relocate one or more of these poles. If a wood utility pole needs to be removed and disposed of during construction, it should be considered treated wood waste and disposed of at a California Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 59 Potentially
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permitted disposal facility approved to accept treated wood waste. Measure HAZ-7 requires that the City ensure proper disposal of treated wood waste if utility poles cannot be relocated and reused on-site.
General Construction Hazards
Some additional examples of hazardous materials handling during construction include fueling andservicing construction equipment on-site. These activities would be short-term or one-time events and would be subject to federal, state, and local health and safety requirements; consequently, no substantial adverse impacts are anticipated. Regulatory compliance through best management practices would minimize the potential for construction of the proposed Project to release of any known toxins or contaminants on or adjacent to the Project site.
As is the case for any Project that proposes excavation, the potential exists for the discovery of unknown hazardous materials and contamination during Project construction. For any previously unknownhazardous waste / material encountered during construction, the procedures outlined in Table 7.1-1,Unknown Hazards Procedures of the Caltrans' Construction Manual latest revision, dated July 2017, shallbe followed.
Impacts to the public or the environment through the routine transport, use, or disposal of hazardous materials, or through reasonably foreseeable upset and accident conditions involving the release ofhazardous materials would be Significant Unless Mitigation is Incorporated. Mitigation measuresHAZ-1 through HAZ-9 have been incorporated into the project to ensure that all hazardous waste in theproject area is adequately identified prior to construction and that plans are in place to ensure that theCity and its contractor safely remediate and dispose of any hazardous materials throughout the courseof construction. c. Emit hazardous emissions or handle hazardous or acutely hazardous materials, substances, or waste within one-quarter mile of an existing or proposed school? WHY? The Project does not involve hazardous emissions or the handling of hazardous materials, substance, or waste and is not within one-quarter mile of an existing or proposed school. Therefore, theproposed Project would have No Impacts to hazardous material related effects to schools. No mitigationis required. d. Be located on a site which is included on a list of hazardous materials sites compiled pursuant to Government Code Section 65962.5 and, as a result, would it create a significant hazard tothe public or the environment? WHY? The State of California Hazardous Waste and Substances Site List (also known as the "Cortese List") is a planning document used by state, local agencies, and developers to comply with CEQArequirements in providing information about the location of hazardous materials sites. Government CodeSection 65962.5 requires the California Environmental Protection Agency to annually update the Cortese List. The California Department of Toxic Substances Control (CDTSC) is responsible for preparing a portion of the information that comprises the Cortese List. Other state and local government agenciesare required to provide additional hazardous material release information that is part of the complete list.
EnviroStor Database is compiled by the CDTSC to identify and track potential hazardous waste sites.
Searches of the above resources identified no sites (CDTSC 2016) within or adjacent to the Project area known to handle and store hazardous materials or are associated with a hazardous material relatedHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 60 Potentially
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release or occurrence; therefore, no impact to a known hazardous location would occur (CDTSC 2016).No Impact wou\d result from the proposed Project. No mitigation is required. e. For a project located within an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, would the Project result in a safety hazard or excessive noise for people residing or working in the Project area? WHY? The Project site is not within an airport land use plan or within two miles of a public airport or public use airport or private airstrip. The nearest public use airport is the Bob Hope Airport in Burbank, which is operated by a Joint Powers Authority with representatives from the Cities of Burbank, Glendale and Pasadena. Therefore, the proposed Project would not result in a safety hazard for people residingor working in the vicinity of an airport and would have No Impacts. No mitigation is required. f. Impair implementation of or physically interfere with an adopted emergency response plan or emergency evacuation plan?
WHY? The City of Pasadena maintains a citywide emergency response plan, which goes into effect at the onset of a major disaster (e.g., a major earthquake). The Pasadena Fire Department maintains thedisaster plan. In case of a disaster, the Fire Department is responsible for implementing the plan, andthe Pasadena Police Department devises evacuation routes based on the specific circumstance of theemergency. The City has pre-planned evacuation routes for dam inundation areas associated with Devil's Gate Dam, Eaton Wash, and the Jones Reservoir.Construction is estimated to last for approximately 12 to 18 months. The Holly Street Bridge would beclosed to vehicle and pedestrian traffic for several months until rehabilitation of its deck is completed.
The bridge would be closed to through traffic for Qpproximatoly 9 months. Closure of the bridge is not expected to substantially affect fire and paramedic emergency access or response times. At present, fireengines and emergency vehicles coming in an easterly direction use major routes such as Colorado Boulevard or SR 134 and major north/south streets (such as Linda Vista Avenue, Orange GroveBoulevard, or 210 freeway) to access neighborhoods and park complexes bordering the Arroyo. Prior to construction, however, as part of Mitigation Measures PS-1 in Section 2.17 and TMP-1 in Section 2.19,detour routes would be coordinated with the Pasadena Fire Department for the duration of the closure of the bridge. Project impacts to emergency services would be Significant Unless Mitigation is Incorporated.
g. Expose people or structures to a significant risk of loss, injury or death involving wildland fires, including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands?
a
D
WHY? The portion of the Project area west of North Arroyo Boulevard has been is identified by the California Department of Forestry and Fire Protection as a Very High Fire Hazard Severity Zone (CAL FIRE 2008). Currently there are four Pasadena Fire Stations within 2 street miles of the Project area, which could respond to a wildland fire in less than five minutes. The proposed Project has a minimal potential for creating a wildland fire during construction through the routine use of construction equipment and construction actions (e.g. refueling on-site, gasoline spill, etc). As part of Mitigation Measure HAZ10, the contractor would prepare a fire prevention plan prior to construction, which requires fire Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 61 Potentially
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extinguishers in all vehicles and other measures for fire prevention/containment. The Project would notexposed people or structures to wildfires once the seismic retrofit is complete. Overall, the Project impacts to expose people or structures to a significant risk of loss, injury or death involving wildland fires, includingwhere wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands is Significant Unless Mitigation is Incorporated.Mitigation Measures:
The following measures would be implemented.
HAZ-1: Prior to the start of any construction work on the bridge, the City or its contactor shall test for asbestos in the bridge concrete and bearing pads. The requirement for this testing shall beincluded in the Project Special Provisions. Remediation of asbestos is required in accordance with South Coast Air Quality Management District (SCAQMD) Rule 1403 prior to demolition or renovation. Under the federal asbestos NESHAP, 40 CFR § 61, Subpart M incorporated intoCalifornia air quality regulations by California Health and Safety Code Section 39658(b)(1) andin compliance with NEShHAP regulations, a certified asbestos consultant (CAC) must makedefinitive conclusions regarding the presence of ACM. The contractor shall hire a CAC toconduct the testing prior to construction.
If hazardous concentrations of asbestos are identified in any structural elements of the Holly Street Bridge that would be impacted during construction, the CAC shall prepare an asbestos remediation and disposal plan. This plan wilt identify specific measures to be taken during construction to contain asbestos containing materials, ensure worker and public safety, and identify a method for handling, transportation, and disposal of the asbestos containing materials at an appropriate hazardous waste disposal facility.
HAZ-2: Prior to the start of construction, the City shall test exposed soil for aerially deposited lead (ADL) adjacent to Holly Street, Linda Vista Avenue, and North Arroyo Boulevard where such soil would be impacted by construction activities. If soil tests identify hazardous concentrations ofADL as defined by the State of California Department of Toxic Substances Control (greater than 80 milligram of lead per kilogram of earth), the City, or its construction contractor, shall prepare aLead Compliance Plan prior to the start of construction. This plan must outline procedures to ensure worker and public safety from ADL that could be disturbed during construction, as welt as identify how the contaminated soils would be safely contained, transported and disposed atan appropriate hazardous waste disposal facility.
HAZ-3: Prior to the start of any construction work on the bridge, the City or its contractor shall test bridge and roadway paint for lead and chromium. Remediation of lead paint is required in accordance with South Coast Air Quality Management District (SCAQMD) Rule 1403 prior to demolition or renovation. A Lead Compliance Plan and Work Plan for the safe testing, removal, storage, transportation, and disposal of lead paint is required prior to the start of removal work by a contractor to ensure work is performed in compliance with health and safety requirements of Title 8 regulations and managed and disposed in compliance with Title 22 regulations. If initialtesting identifies lead or chromium is present in paint on the bridge, the contractor will follow the requirements of the Lead Compliance Plan and Work Plan which will provide methods for saferemoval, transportation, and disposal of the lead/chromium materials at an appropriatehazardous waste disposal facility.
HAZ-4: A site investigation shall be performed to detect any groundwater contamination, including VOCs and perchlorates, within the Project area. The site investigation shall be performed at any locations where excavations would reach a depth of at a minimum of 15 feet below groundsurface (bgs) where construction workers would potentially be exposed to groundwater duringconstruction. The site investigation would involve collection of groundwater samples (groundwater is expected to be encountered during geotechnical borings) and testing thesamples in a laboratory forVOCs and perchlorate contamination.
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If the groundwater testing identifies VOCs or perchlorates, a Contaminated Groundwater Remediation and Disposal Plan shall be required prior to the start of construction. This planshall outline procedures to ensure worker safety from hazardous groundwater contaminants, as well as identify how the groundwater and saturated spoil soils would be safely contained onsite, or transported to a hazardous waste disposal facility during Project construction.
HAZ-5: The contractor shall comply with all applicable regulations and permit requirements for construction dewatering, which may include laboratory testing, treatment of contaminatedgroundwater, or other disposal options, if groundwater is encountered during the proposedProject.
HAZ-6: Prior to construction, the City or its contractor shall inspect the existing electrical transformers in the project area to determine if any leaks of hazardous materials have occurred. All electricalequipment requiring disposal shall be packaged and transported to an appropriate permitted disposal facility. Any leaking transformers observed during the course of the Project areconsidered a potential PCB hazard. The transformer fluid shall be sampled and analyzed byqualified personnel for detectable levels of PCBs. Should PCBs be detected, the City or itscontractor shall prepare a PCB Action Plan for the safe containment, removal, transport, anddisposal of the transformer and any contaminated soils from the associated leak. This remediation shall be completed in accordance with CCR Title 22, Division 4.5.
HAZ-7: If existing wood utility poles require removal during construction, they shall be considered treated wood waste. The City or its contractor is responsible for proper handling, storing, packaging, labeling, transporting, and disposing as treated wood waste under Title 22 CA Codeof Regulations. All treated wood waste generated by the project shall be disposed as hazardous waste in a California permitted disposal facility approved to accept treated wood waste.
HAZ-8: If the relocation of either the gas line or concrete pipes are conducted by the City, instead of being relocated by the responsible utility company, a work plan would be prepared containing the following information: details of the work to be performed, methods for protection of ground from surface spills and asbestos wrap, testing of content, collection of content, tapping andcutting procedures, transport, and disposal of hazardous materials. If the City is responsible for relocation of concrete pipe, the concrete pipes need to be tested for asbestos prior to relocation.
HAZ-9: As is the case for any project that proposes excavation, the potential exists for the discovery of unknown hazardous materials and contamination during Project construction. For anypreviously unknown hazardous waste / material encountered during construction, theprocedures outlined in Table 7.1-1, Unknown Hazards Procedures of the Caltrans' ConstructionManual latest revision, dated July 2017, shall be followed.
HAZ-10: To the satisfaction of the Pasadena Fire Department, prior to construction, the contractor shall prepare a fire prevention plan to reduce the chances of starting and/or spreading a fire. Theprevention plan shall minimally include the placement of fire extinguishers in all equipment.
Additionally, the Resident Engineer shall regularly notify the Pasadena Fire Department of Project construction activities and schedules and any changes to such activities and schedules.
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HYDROLOGY AND WATER QUALITY.
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Less Than
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No Impact
Would the Project:
a. Violate any water quality standards or waste discharge requirements or otherwise substantially degrade surface or ground water quality?
WHY? Section 303 of the federal Clean Water Act requires states to develop water quality standards to protect the beneficial uses of receiving waters. In accordance with California's Porter/Cologne Act, the Regional Water Quality Control Boards (RWQCBs) of the State Water Resources Control Board (SWRCB) are required to develop water quality objectives that ensure their region meets the requirements of Section 303 of the Clean Water Act.
Pasadena is within the greater Los Angeles River watershed, and thus, within the jurisdiction of the Los Angeles RWQCB. The Los Angeles RWQCB adopted water quality objectives in its Stormwater Quality Management Plan (SQMP). This SQMP is designed to ensure stormwater achieves compliance withreceiving water limitations. Thus, stormwater generated by a development that complies with the SQMP does not exceed the limitations of receiving waters, and thus does not exceed water quality standards.
Compliance with the SQMP is ensured by Section 402 of the Clean Water Act, which is known as theNational Pollution Discharge Elimination System (NPDES). Under this section, municipalities are required to obtain permits for the water pollution generated by stormwater in their jurisdiction. These permits are known as Municipal Separate Storm Sewer Systems (MS4) permits. Los Angeles County and 85incorporated Cities therein, including the City of Pasadena, obtained an MS4 (Order No. R4-2012-0175, NPDES Permit No. CAS004001) from the Los Angeles RWQCB, most recently in 2012.
In accordance with the County-wide MS4 permit, all new developments must comply with Low ImpactDevelopment requirements. This ordinance requires most new developments to submit a plan to the City that demonstrates how the Project would comply with the City's Low Impact Development requirements.The Holly Street Bridge Rehabilitation Project is not expected to require a Low Impact Development Plansince it would not result in the creation, addition or replacement of 5,000 square feet or more of impervious surface area.
Although the Arroyo Seco concrete channel is beneath the Holly Street Bridge in the Project area, the proposed Project is designed to avoid this waterway because of the raised platform which would be temporarily constructed above the channel. Best Management Practices (BMPs) would be required for contractors, and the Project would require a National Pollution Discharge Elimination System (NPDES)General Construction Permit for Discharges of storm water associated with construction activities (Construction General Permit 2022-0057-DWQ2012 0006 DWQ. or current General Permit in effect attime of construction). The construction contractor is reauired to adhere to the SWRCB Order No. 2022-0057-DWQ (or current General Permit in effect at time of construction )2012-0006-DWQ NPDES Permit pursuant to Section 402 of the Clean Water Act (CWA). This permit authorizes storm water andauthorized non-storm water discharges from construction activities. As part of this Permit requirement, aStorm Water Pollution Prevention Plan (SWPPP) must be prepared prior to construction consistent with the requirements of the Regional Water Quality Control Board (RWQCB). This SWPPP would incorporate all applicable BMPs, which ensures that adequate measures are taken during construction to minimize impacts to water quality. Therefore, the proposed Project would not violate any water quality standards or waste discharge requirements. Impacts in this regard are Less Than Significant. No mitigation is required.
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b. Substantially decrease groundwater supplies or interfere substantially with groundwater recharge such the Project may impede sustainable groundwater management of the basin? a
a
WHY? The Project would not install any groundwater welts, and would not otherwise directly withdrawany groundwater. In addition, there are no known aquifer conditions at the Project site or in thesurrounding area, which could be intercepted by excavation or development of the Project. Therefore,the proposed Project would not physically interfere with and would have No Impacts to any groundwater supplies. No mitigation is required.
c. Substantially alter the existing drainage pattern of the site or area, including through the alteration of the course of a stream or river or through the addition of impervious surfaces, in amanner which would (i) result in substantial erosion or siltation on- or off-site; D
D
WHY? The Project site is steeply sloping and the Arroyo Seco Flood Control Channel is a major drainagefeature that runs under the Holly Street Bridge. Although the Arroyo Seco concrete channel is beneaththe Holly Street Bridge in the Project area, the proposed Project is designed to avoid this waterway because of the raised platform which would be temporarily constructed above the channel.
Although the Project could change the site's drainage pattern, the Project would not result in substantialerosion or siltation. As discussed above, the Project is subject to NPDES requirements, including the County-wide MS4 permit and the City's stormwater ordinance. The Hotly Street Bridge RehabilitationProject is not expected to require a Low Impact Development Plan since it would not result in the creation,addition or replacement of 5,000 square feet or more of impervious surface area. Complying with NPDESrequirements during construction and implementing the required BMPs would ensure that the proposedProject would have a Less Than Significant Impact for significant erosion or siltation impacts due tochanges to drainage patterns. No mitigation is required.
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(ii) substantially increase the rate or amount of surface runoff in a manner which would result in flooding on- oroffsite;
D
^
WhlY? As discussed, the Project would involve only minor changes in the site's drainage patterns anddoes not involve altering the concrete lined Arroyo Seco Flood Control Channel. The proposed minor changes to the site's drainage patterns would not increase the volume of stormwater runoff generated from the site. Therefore, the proposed project would not result in flooding on- or offsite. The Projectwould have Less Than Significant Impacts regarding surface runoff. No mitigation is required. (iii) create or contribute runoff water which would exceed the capacity of existing or planned stormwater drainage systems or provide substantial additional sources of polluted runoff; or
WHY? The proposed Project is not expected to increase runoff because no new permanent impermeablesurfaces would be introduced onsite. Therefore, the City's existing storm drain system can adequately serve the proposed development.Similarly, as discussed above in Sections 12.a) and 12.c(i), the Project would generate only typical, nonpoint source, urban stormwater pollutants. These pollutants are covered by the County-wide MS4 permit,and the Project, through the City's stormwater ordinance, is required to implement BMPs to reducestormwater pollutants to the maximum extent practicable. Therefore, the proposed Project would notcreate runoff that would exceed the capacity of the storm drain system and would not provide asubstantial additional source of polluted runoff. Therefore, the Project would have Less Than SignificantImpacts to the stormwater drainage systems. No mitigation is required. (iv) impede or redirect flood flows ?
WHY? No portions of the City of Pasadena are within a 100-year floodplain identified by the Federal Emergency Management Agency (FEMA). As shown on FEMA map Community Number 065050, most of the City is in Zone X with some scattered areas in Zone D, for which no floodplain managementregulations are required. Additionally, the proposed Project would not result in the construction of any new permanent structures, nor does it involve the modification of the adjacent landscape. Therefore, theproposed Project would result in No Impact. No mitigation is required. d. In flood hazard, tsunami, or seiche zones, risk release of pollutants due to Project inundation? D
a
WHY? The City of Pasadena is not located near enough to any inland bodies of water or the Pacific Ocean to be inundated by either a seiche or tsunami. Additionally, no portions of the City of Pasadena are within a 100-year floodplain identified by the Federal Emergency Management Agency (FEMA). As shown on FEMA map Community Number 065050, most of the entire City is in Zone X. A few scattered areas are located in Zone D. Both Zone X and Zone D are located outside of the "Special Flood Hazard Areas Subject to Inundation by the 1% Annual Chance of Flood" (100-year floodplain). Therefore, the Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 66 Potentially
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proposed Project would result in No Impacts to the risk of releasing pollutants due to Project inundation.No mitigation is required. e. Conflict with or obstruct implementation of a water quality control plan or sustainable groundwater management plan?
WHY? The Project is a seismic retrofit of the Holly Street Bridge, and as stated in Sections 12.a), 12.c(i), and 12.c(iii), the Project would be required to comply with the City's stormwater ordinance and the County-wide MS4 permit as well as BMPs that would reduce storm water pollutants from entering thestorm drain system. Additionally, the Project would not be pumping from the ground water table.
Therefore, the Project would have No Impacts to water quality control plans or sustainabte groundwater management plans.
Mitigation Measures:None required.
13. LAND USE AND PLANNING.
Would the Project:
a. Physically divide an existing community?
WHY? The proposed Project would seismically retrofit the existing Holly Street Bridge and would not divide an established community. However, there would be a temporary closure of the Holly Street Bridge would require residents to use the West Colorado Boulevard Bridge to cross the Arroyo Seco while the Holly Street Bridge is closed. As this detour is no more than 1.5 miles and is temporary, the Project wouldresult in a Less Than Significant Impact. No mitigation is required. b. Cause a significant environmental impact due to a conflict with any land use plan, policy, or regulation adopted for the purpose of avoiding or mitigating an environmental effect? WHY? As a seismic retrofit project, the proposed Project would not conflict with any applicable land use plan, policy, or regulation, including the City General Plan. As the subject of the retrofit is the National Register eligible Holly Street Bridge, a historic property, the Project would comply with the City's GeneralPlan Land Use Element. Goal 8 relating to Historic Preservation and Goal 10 relating to a SustainableEnvironment are directly applicable to the Holly Street Bridge Rehabilitation Project. Applicable policies from Goals 8 and 10 are discussed below.
GOAL 8. Historic Preservation. Preservation and enhancement of Pasadena's cultural and historic buildings, landscapes, streets and districts as valued assets and important representations of its past and a source of community identity, and social, ecological, and economic vitality.The policies under Goal 8 that apply to the Project includes Policies 8.1, 8.6, 8.7, and 8.8.
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Policy 8.1 expresses the City's policy to identify and protect historic resources that represent significant examples of the City's history. As stated in Section 2.7, there are four historic properties onsite or in thevicinity, the Holly Street Bridge, Pasadena Arroyo Seco Parks and Recreation Historic District, and theArroyo Seco Flood Control Channel. As evaluated in Section 2.7, the proposed Project would not cause a substantial adverse change in the significance of these historic resources. Therefore, the project isconsistent with Policy 8.1.Policy 8.6 deals with infrastructure and street design compatibility. The policy states that the Projectshould encourage street design, public improvements, and utility infrastructure that preserves and iscompatible with historic resources. The Project is a retrofit of the Holly Street Bridge. Measure CUL-1requires the City follow the Secretary of Interior's Standards for the Treatment of Historic Properties Action Plan prepared for the project. This would ensure that adequate protections of historic properties are implemented prior to, during, and after construction. Therefore, the Project is consistent with Policy
8.6. Policy 8.7 deals with preservation of historic landscapes. The policy states that cultural and naturalresources associated with a historic event, activity, or person or exhibiting other cultural or aesthetic values should be identified, protected, and maintained. As stated in Section 2.7, the Project would not have an adverse effect on the Arroyo Parks and Recreation Historic District or any other historiclandscape. Therefore, the Project is consistent with Policy 8.7.Policy 8.8 deals with evolving preservation practices. The policy states that it is the Policy of the City tocontinue to implement practices for historic preservation consistent with community values andconformance with the Secretary of the Interior's Standards for the Treatment of Historic Properties,California Historical Building Code, State laws, and best practices. Measure CUL-1 requires the City follow the Secretary of Interior's Standards for the Treatment of Historic Properties Action Plan preparedfor the project. This would ensure that adequate protections of historic properties are implemented priorto, during, and after construction. The Project would also be compliant to California Historical Building Code, State laws, and best practices. Therefore, the Project would be consistent with Policy 8.8.GOAL 10. City Sustained and Renewed. Development and infrastructure practices that sustain naturalenvironmental resources for the use of future generations and, at the same time, contribute to the reduction of greenhouse gas emissions and impacts on climate change.
The policies under Goal 10 that apply to the Project includes Policies 10.9, 10.11, 10.12, 10.13, 10.14,and 10.16.
Policy 10.9 expresses the City's policy to protect open spaces, hillsides, watersheds, and critical habitats to safeguard the health, safety and beauty of the City for the benefit of present and future generations.The proposed project would result in impacts to disturbed chaparral and woodland habitat to provide construction access around the bridge as discussed in Section 2.6. However, the project has beendesigned to minimize impacts to open space and natural habitats in the Arroyo Seco, while stillimplementing a successful rehabilitation and retrofit of the Holly Street Bridge with the inclusion of mitigation measure BIO-7. This measure would require construction to activities to be limited to a smalt area around the bridge. No long term impact to open spaces, hillsides, watersheds or critical habitats would occur; therefore this project is consistent with Policy 10.9.
Policy 10.11 expresses the City's policy to preserve the natural character of the Eaton Canyon Corridor and the Arroyo Seco as self-sustaining healthy ecosystems of plants and animals, in balance with the integration of recreational facilities and flood control improvements. The proposed project would resultin impacts to disturbed chaparral and woodland habitat to provide construction access around the bridgeas discussed in Section 2.6. However, the project has been designed to minimize impacts to open spaceand natural habitats in the Arroyo Seco, while still implementing a successful rehabilitation and retrofit of the Holly Street Bridge with the inclusion of mitigation measure BIO-7. This measure would require construction to activities to be limited to a small area around the bridge. No significant or long term Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 68 Potentially
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impacts to the Arroyo Seco as a self-sustaining healthy ecosystem of plants and animals would occur asa result of this project, therefore it is consistent with Policy 10.11.
Policy 10.12 expresses the City's policy to preserved and develop urban open spaces such aslandscaped parklets, paseos, courtyards, and community gardens, as welt as ensuring adequate public access to these open spaces. The proposed project has been designed to minimize impacts to opensspaces and recreational resources to the greatest extent feasible. The Arroyo Seco Trail will be open throughout construction (excluding the occasional short term closure) and access to open spaces and recreation along the Arroyo Seco would not be substantially limited. The project would not have any direct impacts on urban open spaces and is consistent with Policy 10.12.
Policy 10.13 expresses the City's policy to maintain and plant additional trees along the City's sidewalks, civic places, parks, and in private developments to support the health and diversity of wildlife, sequesterGHG emissions, and contribute to the reduction of the urban heat-island. The proposed project would result in removal of 24 mature trees that are present around the Holly Street Bridge to provideconstruction access as discussed in Section 2.6. However, the project has been designed to minimizeimpacts to existing trees and natural habitats, while still implementing a successful rehabilitation andretrofit of the Holly Street Bridge with the inclusion of mitigation measure BIO-7. Furthermore, Public trees that are removed as part of this Project would be done so following the requirements of Chapter
8.52 of the City of Pasadena Ordinance regarding City Trees and Tree Protection. By following the requirements of the tree protection ordinance, the Project would be consistent with Policy 10.13.Policy 10.14 expresses the City's policy to maintain and, where appropriate restore, areas of the City with native plants. As discussed in Section 2.6, the proposed project would require removal of vegetation around the Holly Street Bridge for construction access. The existing natural habitat in the project area isdisturbed mixed chaparral and disturbed oak woodland, both of which have a high percentage of nonnative species present. An approximately 20-foot buffer of vegetation removal on either side of the bridge may be needed to ensure the construction contractor can perform the bridge repairs and rehabilitation.Specific isolated areas may need more than 20 feet such as adjacent to the existing bridge piers whichinvolve construction of expanded foundations. Based on preliminary engineering, an estimated 24 mature trees (four inches diameter at breast height) are expected to be removed. In order to ensure the project is consistent with Policy 10.14, the City intends to replant the areas where vegetation is removed through development of a landscape plan which would utilize a palate of plant species native to the Pasadena region. Furthermore, public trees that are removed as part of this Project would be done so following therequirements of Chapter 8.52 of the City of Pasadena Ordinance regarding City Trees and TreeProtection. By adhering to the City tree ordinance and replanting vegetated areas at the end of construction, the proposed project would be consistent with Policy 10.14.
Policy 10.16 expresses the City's policy to design, construct, maintain and improve Pasadena's infrastructure to conserve and reduce impacts to the natural environment. The purpose of this project is to rehabilitate the Holly Street Bridge, an important crossing of the Arroyo Seco and part of the City'stransportation infrastructure. Mitigation Measures BIO-1 through BIO-7 have been developed to minimize impacts to the natural environment within the project area. As such, this project is consistent with Policy 10.16.
As the Project would be consistent with the City's General Plan for Historic Perseveration and a Sustainable Environment, the Project would have Less Than Significant Impact. No mitigation is required.Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 69 Potentially
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c. Conflict with any applicable habitat conservation plan (HCP) or natural community conservation plan (NCCP)?
WHY? Currently, there are no adopted Habitat Conservation or Natural Community Conservation Planswithin the City of Pasadena. There are also no approved local, regional or state habitat conservation plans. Therefore, the Project would have No Impact to an HCP. No mitigation is required.Mitigation Measures:None required.
14. MINERAL RESOURCES.
Would the Project:
a. Result in the loss of availability of a known mineral resource that would be of value to the region and the residents of the state?
D
D
a
WHY? No active mining operations exist in the City of Pasadena. There are two areas in Pasadena that may contain mineral resources. These two areas are Eaton Wash, which, was formerly mined for sand and gravel, and Devils Gate Reservoir, which was formerly mined for cement concrete aggregate. The Project is not near these areas. Therefore, the Project would have No Impact to known mineralresources. No mitigation is required. b. Result in the loss of availability of a locally-important mineral resource recovery site delineated on a local general plan, specific plan or other land use plan? WHY? The City's 2015 General Plan Land Use Element does not identify any mineral recovery sites within the City. Furthermore, there are no mineral-resource recovery sites shown in the Arroyo Seco Master Plans; or the 1999 "Aggregate Resources in the Los Angeles Metropolitan Area" map publishedby the California Department of Conservation, Division of Mines and Geology. No active miningoperations exist in the City of Pasadena and mining is not currently allowed within any of the City'sdesignated land uses. Therefore, the proposed Project would have No Impact ^om the loss of a locallyimportant mineral resource recovery site. See also Section 2.14.a) of this document. No mitigation isrequired.Mitigation Measures:
None required.
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15. NOISE.
Significant
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Less Than
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Impact
No Impact
Will the Project result in:
a. Generation of a substantial temporary or permanent increase in ambient noise levels in the vicinity of the Project in excess of standards established in the local general plan or noise ordinance, orapplicable standards of other agencies? WHY? The Project itself would not lead to a significant increase in ambient noise. The Project does not involve installing a stationary noise source, and would not increase the capacity of the Bridge or otherwise affect traffic noise in the area.The Project would generate short-term noise due to construction activities. However, the Project would adhere to City regulations governing hours of construction, noise levels generated by construction andmechanical equipment, and the allowed level of ambient noise (Chapter 9.36 of the Pasadena MunicipalCode). In accordance with these regulations, construction noise would be limited to normal working hours(7 a.m. to 7 p.m. Monday through Friday, 8 a.m. to 5 p.m. on Saturday, in or within 500 feet of a residentialarea). A Construction Staging and Traffic Management Plan is also required by the City's Department of Transportation to ensure that truck routes for transportation of materials and equipment are establishedwith consideration for sensitive uses in the neighborhood. Therefore, adhering to established City procedures would ensure that the Project would not generate noise levels in excess of standards.The Project would result in Less than Significant Impacts from noise generated from constructionactivities. No mitigation is required. b. Generation of excessive groundborne vibration orgroundborne noise levels? a
^
WHY? The Project is not located near any existing sources of groundborne noise or vibration andoperation of the Bridge would not generate any new long-term vibration sources.
Construction activities associated with the proposed project may result in ground vibration. Table 4 depicts example vibration amounts generated from the types of construction equipment that may be used onsite with regards to the Peak Particle Velocity (PPV) at a range of 25 feet.
Table 4: Vibration Source Amplitudes for Construction Equipment Equipment | PPVat25ft(in/sec)
Large Bulldozer 0.089
Caisson drilling
Loaded trucks
0.0890.076
Jackhammer
Small bulldozer
0.035
0.003
Source: Federal Transit Administration, 2006. See also:
httD://www.fhwa.dot.aov/environment/noise/construction noise/handbook/handbook09.cfm Vibration can impact nearby uses by causing damage to a structure or interfering with the normaloperation of certain sensitive uses (e.g., surgical centers). There are no surrounding land uses that include operations that could be disrupted by short-term and intermittent construction vibrations. The threshold at which there is a risk of damage to older buildings is 0.3 PPV (in/sec) (Caltrans 2013). There are older buildings (residences) within the project area that could potentially be impacted by constructionhlolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 71 Potentially
Significant
Impact
Significant
Unless
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Less Than
Significant
Impact
No Impact
generated vibration. These buildings are located on the north and south side of Holly Street east of the bridge and on the north side of Holly Street west of the bridge. These buildings are located as close as 10 feet away from where construction activities will be occurring such as repaying, sidewalk reconstruction, and spall/crack repair at isolated locations on the bridge structure. None of these activitiesare considered substantial sources of vibration. The project activities that do have a potential to generatesubstantive vibration are jackhammering the existing bridge deck, excavation (excavator and smallbulldozer) to prepare for the pile-cap expansion and drilling shafts for the micropile installation. All of these activities would occur at 80 or more feet away from the closest privately owned building.
As shown in Table 4, above, none of the activities have the potential to reach 0.3 PPV (in/sec) to any ofthe adjacent buildings because construction-related activities that could generate vibration are below the0.3 PPV (in/sec) threshold at 25 feet and these activities would occur at 80 or more feet away from thestructures. Therefore, there is no potential for damage to older buildings cause by groundborne vibration.
All potential vibratory effects to the environment would be temporary. Construction-related vibration wouldtherefore result in a Less Than Significant Impact. No mitigation is required. c. For a project located within the vicinity of a private airstrip or an airport land use plan or, where such a plan has not been adopted, within two miles of a public airport or public use airport, wouldthe Project expose people residing or working in the Project area to excessive noise levels? WHY? There are no airports, private airstrips, or airport land-use plans in the City of Pasadena. The closest airports are the El Monte Airport, which is 8.5 miles away, and the Bob Hope Airport (formerly the Burbank-Glendale-Pasadena Airport), which is located more than 10 miles from Pasadena in the City ofBurbank. Therefore, the proposed Project would not expose people to excessive airport related noise and would have No Impacts. No mitigation is required.
Mitigation Measures:None required.
16. POPULATION AND HOUSING.
Would the Project:
a. Induce substantial population growth in an area, either directly (for example, by proposing new homes and businesses) or indirectly (for example, through extension of roads or other infrastructure)?
D
D
WHY? The proposed Project involves seismic retrofit of the Holly Street Bridge, which would not directly or indirectly induce population growth, displace housing or necessitate construction of replacementhousing (See Section 2.13 of this document). Therefore, the proposed Project is consistent with the growth anticipated and accommodated by the City's General Plan. Furthermore, the Project is located in a developed suburban area with an established roadway network and in-place infrastructure. Thus, development of the proposed Project would not require extending or improving infrastructure in a mannerHolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 72 Potentially
Significant
Impact
Significant
Unless
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Incorporated
Less Than
Significant
Impact
No Impact
that would facilitate off-site growth. Therefore, the proposed Project would not induce substantial population growth, and would have Less than Significant Impacts. No mitigation is required. b. Displace substantial numbers of existing people or housing, necessitating the construction of replacement housing elsewhere?
WHY? The seismic retrofit of the Holly Street Bridge does not involve the removal of any existing dwelling units. Therefore, the proposed Project would not displace any residents or housing and would have No Impacts. No mitigation is required.
Mitigation Measures:None required.
17. PUBLIC SERVICES.
Will the Project result in substantial adverse physical impacts associated with the provision of new or physically altered governmental facilities, need for new or physically altered governmental facilities, the construction of which could cause significant environmental impacts, in order to maintain acceptableservice ratios, response times or other performance objectives for any of the public services:
a. Fire Protection?
a
a
D
WHY? The proposed Project would not result in the need for additional new or altered fire protectionservices and would not alter acceptable service ratios or response times. The proposed Project consists of the seismic retrofit of Holly Street Bridge, which would not increase the demand on the Pasadena FireDepartment. Therefore, the proposed Project would not significantly impact fire protection services.However, the Holly Street Bridge would be closed for several months until work is completed on the deckrehabilitationfor approximatoty 9 months out of the 18 months of construction, which would require detours around the bridge. The two closest fire stations are Station 31 and Station 39, located to the southeast and southwest, respectively from the Project area. A response from either station would requireapproximately 1.2 miles of travel to their respective sides of the bridge. A need for Station 31 to access the northwest side of Holly Street Bridge would require traveling on Highway 134 to San Rafael Avenueto Colorado Boulevard to Linda Vista Avenue, which would add approximately one (1) mile of travel tothat location. A need for Station 39 to access the southeast side of Holly Street Bridge would requiretraveling over The Colorado Street Bridge to Orange Grove Avenue to Holly Street, which would add approximately 0.25 miles of travel to that location. See also Section 2.11.h) of this document for wildfirerelated impacts.
In 2019, City of Pasadena Project Manager James Tong coordinated with Pari Bagayee, City of Pasadena Fire Department Plans Examiner Supervisor, regarding the traffic detour for the bridge closure.
The Fire Department did not object to the proposed bridge closure. During the design phase, the City of Pasadena Public Works Department will continue to coordinate with City Police, Fire, and the Public Information Officer to prepare and approve a Traffic Management Plan that would establish specific detours and emergency access routes.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 73 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
With the implementation of Mitigation Measure PS-1 as well as Measures HAZ-10 in Section 2.11 andTMP-1 in Section 2.19 and the notification of emergency services of the construction schedule and bridgeclosures, the Project would have a less than significant impact. Impacts in this regard are considered Significant Unless Mitigation is Incorporated.
b. Police Protection?
WHY? The proposed Project would not result in the need for additional new or altered police protection services and would not alter acceptable service ratios or response times. The proposed Project consistsof the seismic retrofit of Holly Street Bridge, which would not increase the demand on the Pasadena Police Department. Therefore, the proposed Project would not significantly impact police protection services.
However, the Holly Street Bridge would be closed for several months until deck rehabilitation has been completedfor opproximatoly 9 months out of the 18 months of construotion, which would require detoursaround the bridge. A police officer on the southeast side of the bridge would have to travel 1.6 miles via Orange Grove Boulevard to Highway 134 to San Rafael Avenue to Colorado Boulevard to Linda Vista Avenue to reach the northwest side of the bridge. A police officer on the northwest side of the bridgewould travel the same distance in the opposite direction, but could also take Colorado Boulevard instead of Highway 134 with the same travel distance.
The proposed site is in an area which has reported low crime rates according to Police Department burglary statistics. The Project would not increase the need for police protection. With the implementationof Mitigation Measure PS-1 as well as Measures HAZ-10 in Section 2.11 and TMP-1 in Section 2.19and the notification of emergency services of the construction schedule and bridge closures, the Project would have a less than significant impact. Impacts in this regard are considered Significant Unless Mitigation/'s Incorporated. c. Schools?
WHY? The proposed Project involves the seismic retrofit of the Holly Street Bridge and does not includethe construction of any habitable structures or other uses that would require public services. Therefore,the proposed Project would have No Impact on schools. No mitigation is required. d. Parks?
^
WhlY? The proposed Project involves the seismic retrofit of the Holly Street Bridge and does not includethe construction of any habitable structures or other uses that would require public services. Therefore,the proposed Project would have No Impact on parks. No mitigation is required.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 74 Potentially
Significant
Impact
Significant
Unless
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e. Libraries?
Less Than
Significant
Impact
D
No Impact
WHY? The proposed Project involves the seismic retrofit of the Holly Street Bridge and does not includethe construction of any habitable structures or other uses that would require public services. Therefore,the proposed Project would have No Impact on libraries. No mitigation is required. f. Other public facilities?
D
WHY? The proposed Project involves the seismic retrofit of the Holly Street Bridge and does not includethe construction of any habitable structures or other uses that would require public services. Therefore,the proposed Project would have No Impact on other public facilities. No mitigation is required.
Mitigation Measures:
In addition to PS-1, please refer to HAZ-10 in Section 2.11 and TMP-1 in Section 2.19 for additional the mitigation measures.PS-1: To help minimize the potential for delays in emergency responses during construction due to closure of the Holly Street Bridge and other construction activities, the City Public WorksDepartment shall consult with the Pasadena Fire Department, Pasadena Police Department, localhospitals and emergency clinics, and any other emergency response agencies, to disclose roadclosures and identify alternative access and detour routes.
18. RECREATION.
a. Would the Project increase the use of existing neighborhood and regional parks or other recreational facilities such that substantial physical deterioration of the facility would occur or beaccelerated? WHY? The Project boundary includes portions of the Arroyo Seco Park and construction activities may cause traffic delays for the public to access the park. All the park facilities would be open as normal duringconstruction. Once construction of the Project is completed, the traffic patterns would return to preconstruction conditions.The Rose Bowl is located within the Arroyo Seco Park and is approximately 0.75 miles north of the HollyStreet Bridge. Construction activities could result in direct impacts to access and parking for major Rose Bowl events (i.e. football games and concert events). In 2018, the City of Pasadena Public Works Department met with the Rose Bowl Operating Company to discuss the project and identify any concerns that could be a consideration during Project construction. The Rose Bowl Operating Company staff requested that construction staging not occur in a location where it would directly impact event parkingduring major events. With the implementation of REC-1, the Project would have a less than significant impact by restricting construction activities during the days when football games or other major events would occur at the Rose Bowl. Impacts in this regard are considered Significant Unless Mitigation is Incorporated
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 75 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
b. Does the Project include recreational facilities or require the construction or expansion of recreational facilities, which might have an adverse physical effect on the environment? n
a
WHY? The Project does not include recreational facilities and would not require the construction orexpansion of recreational facilities. Therefore, the proposed Project does not involve the development of recreational facilities that would have an adverse effect on the environment, and would have No Impacts on recreational facilities. No mitigation is required.
Mitigation Measure:
The following measure would be implemented to reduce impacts to a less than significant level.
REC-1: The contractor shall coordinate with the City's Parks and Natural Resources Division and the Rose Bowl Operating Company to determine Rose Bowl event dates when construction activities shall be restricted.
19. TRANSPORTATION/TRAFFIC.
Would the Project:
a. Conflict with an applicable plan, ordinance or policy establishing measures of effectiveness for the performance of the circulation system, taking into account all modes of transportationincluding mass transit and non-motorized travel and relevant components of the circulationsystem, including but not limited to intersections, streets, highways and freeways, pedestrian andbicycle paths, and mass transit? WHY? The Project is a seismic retrofit of the Holly Street Bridge, which is already part of the City's circulation plan. As there would be no change between the existing condition and the future condition,there would be no potential to be inconsistent with any existing city plans, ordinances, policies, or measures for performance of the circulation system. The Project would have No Impacts to applicableplans. No mitigation is required. b. Conflict with an applicable congestion management program, including, but not limited to level of service standards and travel demand measures, or other standards established by the county congestion management agency for designated roads or highways? a
D
WHY? The Project is a seismic retrofit of the Holly Street Bridge, which is already part of the City's circulation plan. The Project would maintain the existing capacity of Holly Street. Therefore, the Projectwould result in No Impactto the County's Congestion Management Plan. No mitigation is required.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 76 Potentially
Significant
Impact
Significant
Unless
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Less Than
Significant
Impact
No Impact
c. Substantially increase hazards due to a design feature (e.g., sharp curves or dangerous intersections) or incompatible uses (e.g., farm equipment)? WHY? The Project is a seismic retrofit of Holly Street Bridge that would add a barrier on the existing sidewalk to protect pedestrians from vehicular traffic. These barriers would not reduce the traffic lane widths, and while the barriers would reduce sidewalk widths, the sidewalks would be greater than the standard width. To protect vehicles, cyclists, equestrians, and pedestrians traveling underneath thebridge during construction, a construction platform would be installed, which would prevent debris from falling to the ground below. Therefore, the proposed Project would not increase hazards due to a designfeature or incompatible use, and would have No Impact. No mitigation is required. d. Result in inadequate emergency access?
WHY? The seismic retrofit of the Holly Street Bridge would not permanently affect emergency vehicle access, but the bridge would be closed for several months until rehabilitation of the deck is completed-feF approximately 9 months during construction. Emergency services would be kept apprised of the construction status as detailed in TMP-1. A detailed description of the detour routes is included in Section2.17a and b. With the implementation ofTMP-1, impacts would reduced to a less than significant level.
Impacts in this regard are considered Significant Unless Mitigation is Incorporated.Mitigation Measure:In addition to the following Mitigation Measure that would be implemented, Measure PS-1 in Section 2.17 will also be implemented:TMP-1: The contractor shall prepare and implementa Construction Staging and Traffic Management Plan to minimize traffic disruption during construction activities. The plan shall be made available to the public and affected stakeholders that use the bridge for access. The followingelements shall be included in the plan: parking, detours/road closures, pedestrian/commercial/residential access, and media campaign. hlolly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 77
20. Potentially
Significant
Impact
TRIBAL CULTURAL RESOURCES.
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
Would the Project cause a substantial adverse change in the significance of a tribal cultural resource,defined in Public Resources Code section 21074 as either a site, feature, place, cultural landscape that is geographically defined in terms of the size and scope of the landscape, sacred place, or object withcultural value to a California Native American tribe, and that is:
a. Listed or eligible for listing in the California Register of Historical Resources, or in a local register of historical resources as defined in Public Resources Code section 5020. 1(k).
WHY? The Project is not anticipated to cause a substantial adverse change in the significance of a Tribal Cultural Resource (TCR) listed or eligible for listing in the California Register of Historical Resources, or in a local register of historic resources as defined in Public Resources Code section 5020.1(k). No TCRshave been identified within the City and no impacts to TCRs are anticipated; however, with any Projectrequiring ground disturbance, there is always the possibility that previously unknown TCRs may beunearthed during construction. This impact would be considered potentially significant. Implementation of Mitigation Measure CUL-2GR-4 and CR 2 (included in Section 2.7) and TCR-1 through TCR-5 would reduce the potential impact to a less than significant level. Impacts are considered potentially Significant Unless Mitigation Incorporated.
b. A resource determined by the lead agency, in its discretion and supported by substantial evidence, to be significant pursuant to criteria set forth in subdivision (c) of Public Resources Code Section 5024.1. In applying the criteria set forth in subdivision (c) of Public Resource Code Section 5024.1, the lead agency shall consider the significance of the resource to a CaliforniaNative American tribe.
D
a
D
WHY? The Project is not anticipated to cause a substantial adverse change to a TRC pursuant to criteria set forth in subdivision (c) of Public Resources Code Section 5024.1. No TCRs have been identified within the Project area; however, with any Project requiring ground disturbance, there is the possibility that previously unknown tribal cultural resources may be unearthed during construction.The City of Pasadena Department of Public Works sent AB52 consultation request letters via certified mail on February 14, 2018 to Native American tribes who requested to be notified of projects within the City of Pasadena. One response letter was received from the Gabrieleno Band of Mission Indians - Kizh Nation requesting consultation. The City had a conference call with the Gabrieleno Band of Mission Indians - Kizh Nation on March 22, 2018 to discuss the Project in greater detail. The tribe provided a list of avoidance, minimization measures. No tribal cultural resources were identified bytheGabrieleno Bandof Mission Indians - Kizh Nation. On June 24, 2019, the City sent an email to the Gabrieleno Band ofMission Indians - Kizh Nation providing a draft of the mitigation measures proposed for tribal culturalresources. A response email was received from Andy Salas on June 27, 2019 with a request that theCity use additional measures to ensure late discovery during construction of tribal resources areadequately mitigated. Measures TCR-1 through TCR-5 are the measures that resulted from the June 2019 consultation. Implementation ofTCR-1 through TCR-5 as well as CUL-2GR-4 and CR-2, (in Section
2.7) would reduce potential impacts to previously unknown tribal cultural resources to a less thansignificant level. Impacts are considered potentially Significant Unless Mitigation is Incorporated.
Mitigation Measures:Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 78 Potentially
Significant
Impact
Significant
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Incorporated
Less Than
Significant
Impact
No Impact
The following mitigation measures would be incorporated to reduce impacts to a less than significant level:
TCR-1: Retain a Native American Monitor/ConsuItant: The City shall retain and compensate for the services of a Tribal monitor/consultant who is both approved by the Gabrieleno Band of MissionIndians-Kizh Nation Tribal Government and is listed under the NAHC's Tribal Contact list for thearea of the project location. This list is provided by the NAHC. The monitor/consultant will onlybe present on-site during the construction phases that involve ground disturbing activities.Ground disturbing activities are defined by the Gabrieleno Band of Mission Indians-Kizh Nationas activities that may include, but are not limited to, pavement removal, pot-holing or auguring,grubbing, tree removals, boring, grading, excavation, drilling, and trenching, within the projectarea. The Tribal Monitor/consultant will complete daily monitoring logs that will providedescriptions of the day's activities, including construction activities, locations, soil, and any cultural materials identified. The on-site monitoring shall end when the project site grading andexcavation activities are completed, or when the Tribal Representatives and monitor/consultant have indicated that the site has a low potential for impacting Tribal Cultural Resources.
TCR-2: Unanticipated Discovery of Tribal Cultural Resources: Upon discovery of any potential Tribal Cultural Resources, cease construction activities in the immediate vicinity of the find untilthe find can be assessed. All potential Tribal Cultural Resources unearthed by project construction activities shall be evaluated by a qualified archaeologist, who meets the Secretaryof the Interior's Professional Qualification Standards in Archaeology, and by the tribalmonitor/consultant approved by the Gabrieleno Band of Mission Indians-Kizh Nation. If theresources are Native American in origin, the Gabrieleno Band of Mission Indians-Kizh Nationshall assess whether the discovery meets the eligibility requirements to qualify as a TribalCultural Resource pursuant to Public Resources Code (CEQA) Section 21074. Should thediscovery qualify as a Tribal Cultural Resource pursuant to CEQA, they will consult with the Cityregarding avoidance measures, or appropriate mitigation treatment, and curation of the TribalCultural Resource. Work shall be diverted to other areas of the Project until the discovery canbe assessed and treated.
TCR-3: Unanticipated Discovery of Human Remains and Associated Funerary Objects - Identification and Initial Assessment: Section 5097.94 of the Public Resources Code andSection 7050.5 of the California Health and Safety Code protect Native American burials,skeletal remains and grave goods, regardless of age and provide method and means for theapDropriate handling of such remains. If human remains are encountered, work shall halt in that vicinity and the county coroner shall be notified immediately. At the same time, an archaeojogjst shall be contacted to evaluate the situation. If the human remains are of Native American origin, the coroner must notify the Native American hleritaae Commission within 24 hours of such identification. Further provisions of PRC 5097.98 are to be followed as appjicable.
Native American human remains are defined in PRC 5097.98 (d)(1) as an inhumation or cremation, and in any state of decomposition or skeletal completeness. Funerary objects, called associated grave goods in PRC 5097.98, are also to be treated according to this statute. Healthand Safety Code 7050.5 dictates that any discoveries of human skeletal material shall beimmediately reported to the County Coroner. The Resident Engineer shall be responsible forcontacting the County Coroner.
A work exclusion zone shall be placed around the discovery and within an area reasonably suspected to overlie adjacent human remains until the coroner has determined the nature of theremains. If the coroner recognizes the human remains to be those of a Native American or hasreason to believe that they are those of a Native American, he or she shall contact, by telephone within 24 hours, the Native American Heritage Commission (NAHC) and PRC 5097.98 and CEQA Guidelines 15064.5(e) shall be followed. This includes the NAHC designating and Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 79 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
contacting the Most Likely Descendent (MLD). Once notified, the MLD has 24 hours to makerecommendations to the City regarding the preferred treatment of the remains and anyassociated grave goods. Should a MLD not be identified or should the MLD not respond within 24 hours, then the City shall follow CEQA Guidelines 15064.5(e)(2). It is the City's responsibility to keep the remains secured until reburial or other appropriate treatment can occur Work may not resume in the discovery area until the remains have been removed and the MLD, or in the absence of a MLD, a qualified archaeologist, has lifted the work exclusion zone limitations.
TCR-4: Gabrieleno Band of Mission Indians-Kizh Nation Human and Funerary Remains: If the Gabrieleno Band of Mission Indians - Kizh Nation is the designated MLD, the followingtreatment measures shall be implemented. To the Tribe, the term "human remains"encompasses more than human bones. In ancient as well as historic times, Tribal Traditions included, but were not limited to, the burial of funerary objects with the deceased, and theceremonial burning of human remains. These remains are to be treated in the same manner asbone fragments that remain intact. Associated funerary objects are objects that, as part of thedeath rite or ceremony of a culture, are reasonably believed to have been placed with individualhuman remains either at the time of death or later; other items made exclusively for burialpurposes or to contain human remains can also be considered as associated funerary objects.
TCR-5: Treatment Measures: In the case where discovered human remains cannot be fully documented and recovered on the same day, the remains will be covered with muslin cloth anda steel plate that can be moved by heavy equipment placed over the excavation opening to protect the remains. If this type of steel plate is not available, a 24-hour guard should be posted outside of working hours. The Tribe will make every effort to recommend diverting the projectand keeping the remains in situ and protected. If the project cannot be diverted, it may bedetermined that burials will be removed. The Tribe will work closely with the qualified archaeologist to ensure that the excavation is treated carefully, ethically and respectfully. If datarecovery is approved by the Tribe, documentation shall be taken which includes at a minimum detailed descriptive notes and sketches. Additional types of documentation shall be approved by the Tribe for data recovery purposes. Cremations will either be removed in bulk or by meansas necessary to ensure complete recovery of all material. If the discovery of human remainsincludes four or more burials, the location is considered a cemetery and a separate treatmentplan shall be created. Once complete, a final report of all activities is to be submitted to the Tribeand the NAHC. The Tribe does NOT authorize any scientific study or the utilization of anyinvasive diagnostics on human remains.
Each occurrence of human remains and associated funerary objects will be stored usingopaque cloth bags. Alt human remains, funerary objects, sacred objects and objects of culturalpatrimony will be removed to a secure container on site if possible. These items should beretained and reburied within six months of recovery.Prior to the continuation of ground disturbing activities, the City and the Tribe shall consult on alocation for the respectful reburiat of the human remains and/or ceremonial objects. The location of reburial/repatriation shall be within the project footprint or other area which can be protected in perpetuity from all ground disturbing activities. There shall be no publicity regarding any cultural materials recovered or reburied.
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Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
Potentially
Significant
Impact
21. UTILITIES AND SERVICE SYSTEMS.
Would the Project:
a. Require or result in the relocation or construction of new or expanded water, wastewater treatment or storm water drainage, electric power, natural gas, or telecommunications facilities, theconstruction or relocation of which could cause significant environmental effects? WHY? The proposed Project is restricted to the seismic retrofit of Holly Street Bridge; therefore, the proposed Project would not involve wastewater treatment requirements. Additionally, the Project wouldnot require the construction or expansion of new water or wastewater treatment facilities.No new storm water drainage facilities would be required as the proposed Project is only for the seismicretrofit of Holly Street Bridge. There are existing storm drain facilities on Holly Street located just off thebridge that collect street run off and drain into the Arroyo Seco Channel beneath the bridge. These facilities may need to be temporarily relocated during construction. Relocation would be accomplished by removing the existing gutter inlet, extending the culvert with a flexible plastic or corrugated metal pipe,and relocating the inlet to another location using sand bags to ensure stormwater is collected into therealigned inlet. These storm drain relocations would occur within the project footprint and would bereplaced in-kind with the reconstruction of the sidewalks, curb and gutter by the end of construction.Several utilities are located within the project footprint and these facilities along with their location is listed below:
AT&T Communication Lines (located in bridge)
Charter Communication Lines (located in bridge)County Sewer Line (located in bridge)Pasadena DWP Electric (located in bridge)Pasadena Public Works - Sewer & Storm (located in bridge) Pasadena Public Works - Street Lights & Signals (located in bridge) Socal Gas (located in bridge)
Level 3 Communication Lines, Century Link (overhead lines)Pasadena DWP Water (location unconfirmed) Verizon (location unconfirmed)
The City would work directly with each utility company during final design of the project to develop a planto relocate each of these facilities during construction. All utility relocations are expected to occur withinthe existing environmental study area. If utilities are relocated outside the project footprint, they would require a separate CEQA review. Utility relocations could result in temporary outages for local customers,but standard notifications would be provided if outages are expected. A Less than Significant Impact would occur. No mitigation is required.
b. Have sufficient water supplies available to serve the Project and reasonably foreseeable future development during normal, dry and multiple dry years?
D
a
WHY? The proposed Project consists of the seismic retrofit of Holly Street Bridge, and would not increasethe demand for water. Therefore, the Project would not result in insufficient water supplies, and would have No Impacts. No mitigation is required.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 81 Potentially
Significant
Impact
Significant
Unless
Mitigation isIncorporated
Less Than
Significant
Impact
No Impact
c. Result in a determination by the wastewater treatment provider, which serves or may serve the Project that it has adequate capacity to se/ve the Project's projected demand in addition to the provider's existing commitments?
WHY? The proposed Project consists of seismic retrofit of Holly Street Bridge, and would not increasethe demand for wastewater service. Therefore, the Project would not result in insufficient wastewater service, and would cause No Impacts. No mitigation is required. d. Generate solid waste in excess of State or local standards, or in excess of the capacity of local infrastructure, or otherwise impair the attainment of solid waste reduction goals? WHY? The Project can be served by a landfill with sufficient permitted capacity to accommodate the Project's solid waste disposal needs during construction. The City of Pasadena is served primarily by Scholl Canyon landfill which has an estimated remaining capacity of approximately 6,000,000 cubicyards. Its estimated closure is 2030. Construction is expected to occur in 2022-2023 so this landfill can be used for disposal of solid waste during construction.
Therefore, the Project would cause No Impacts under this topic. No mitigation is required. e. Comply with federal, state, and local statutes and regulations related to solid waste? D
D
a
WHY? The proposed Project would comply with federal, state, and local statutes and regulations relatedto solid waste. Therefore, No /mpacf would result from the proposed Project. No mitigation is required.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 82 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
22. WILDFIRE.
If located in or near state responsibility areas or lands classified as very high fire hazard severity zones, would the Project:
a. Substantially impair an adopted emergency response plan or emergency evacuation plan ? D D
WHY? The portion of the Project area west of North Arroyo Boulevard is identified by the California Department of Forestry and Fire Protection as a Very High Fire Hazard Severity Zone (CAL FIRE 2019).
The Project would not substantially change the existing condition in terms of wildfire risk, but it would result in a closure of Holly Street Bridge which could affect emergency response routes if a wildfireoccurred in or near the Project area. Currently there are four Pasadena Fire Stations within 2 street mitesof the Project area, which could respond to a wildland fire in less than five minutes. As part of Mitigation Measure HAZ-10 in Section 2.11, the contractor would prepare afire prevention plan prior to construction, which requires fire extinguishers in all vehicles and other measures for fire prevention/containment.
Furthermore, Mitigation Measures PS-1 in Section 2.17 and TMP-1 in Section 2.19 would provide a detour route during construction when the Holly Street Bridge is closed and this information would becommunicated to all emergency response agencies prior to the start of construction. The Project would not exposed people or structures to wildfires once the seismic retrofit is complete. Overall, the Projectimpacts to expose people or structures to a significant risk of loss, injury or death involving wildland fires,including where wildlands are adjacent to urbanized areas or where residences are intermixed with wildlands is Significant Unless Mitigation is Incorporated. b. Due to slope, prevailing winds, and other factors, exacerbate wildfire risks, and thereby expose Project occupants to pollutant concentrations from a wildfire or the uncontrolled spread of a wildfire?
WHY? The proposed Project is a seismic retrofit and rehabilitation of the existing Holly Street Bridge. Nosubstantive changes to the Project area would occur that would result in an increase long term risk of wildfire or spread of wildfire. Ask discussed in response "21 .a" above and required by Mitigation Measure HAZ-10 in Section 2.11, best management practices would be implemented during construction tominimize the risk of accidental fire which could contribute to short term wildfire risks. As a result, impactsare considered Significant Unless Mitigation Incorporated. c. Require the installation or maintenance of associated infrastructure (such as roads, fuel breaks, emergency water sources, power lines or other utilities) that may exacerbate fire risk or that mayresult in temporary or ongoing impacts to the environment? WHY? The proposed Project is a seismic retrofit and rehabilitation of the existing Holly Street Bridge. No installation or maintenance of associated infrastructure that could exacerbate fire risk would occur as aresult of this Project. There would be No Impacts from infrastructure associated with wildfire protection.No mitigation is required.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 83 Potentially
Significant
Impact
Significant
Unless
Mitigation is
Incorporated
Less Than
Significant
Impact
No Impact
d. Expose people or structures to significant risks, including downslope or downstream flooding or landslides, as a result of ru noff, post-fire slope instability, or drainage changes? D
D
WHY? The proposed Project is a seismic retrofit and rehabilitation of the existing Holly Street Bridge. No changes in risk of post wildfire disasters would occur as a result of the Project compared to the existing condition. There would be No Impact to exposing people or structures to significant wildfire or post wildfire related disaster. No mitigation is required.
Mitigation Measures:
Refer to Measure HAZ-10 in Section 2.11, PS-1 in Section 2.17, andTMP-1 in Section 2.19
23. a.
MANDATORY FINDINGS OF SIGNIFICANCE.
Does the Project have the potential to degrade the quality of the environment, substantially reducethe habitat of a fish or wildlife species, cause a fish or wildlife population to drop below selfsustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrictthe range of a rare or endangered plant or animal or eliminate important examples of the major periods of California history or prehistory?
a
n
WHY? As discussed in Section 2.6 Biological Resources, no significant impacts are anticipated with the inclusion of appropriate avoidance, minimization and/or mitigation measures. Inclusion of these measures would ensure that the Project would not have the potential to degrade the quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, substantially reduce the number or restrict the range of rare or endangered plant or animal community,substantially reduce the number or restrict the range of a rare or endangered plant or animal. Specifically, implementation of BIO-1 through BIO-7 would reduce Project impacts to biological resources to a less than significant level.
Similarly, as discussed in Section 2.7 Cultural Resources, the Project has been designed to minimize, to the greatest extent feasible, impacts to the historic Holly Street Bridge and the historic Arroyo Seco Parks and Recreation District, and to completely avoid impacts to other historic resources in the Project area.
Implementation of measure CUL-1 through CUL-2 and TCR-1 through TCR-5 would reduce potentially significant impacts to a less than significant level and these impacts are not expected to contribute to theelimination of important examples of the major periods of California history or prehistory. Therefore, the Project would not result in a Mandatory Finding of Significance in this regard. Impacts are considered Significant Unless Mitigation is Incorporated.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 84 Potentially
Significant
Impact
Significant
Unless
Mitigation isIncorporated
Less Than
Significant
Impact
No Impact
b. Does the Project have impacts that are individually limited, but cumulatively considerable? ("Cumulatively considerable" means that the incremental effects of a Project are considerablewhen viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future project)?
WHY? The proposed Project would not cause impacts that are cumulatively considerable. The Project has the potential to contribute to cumulative air quality, biological resource, cultural resource, hydrology, water quality, noise, public services, and traffic impacts. However, none of these cumulative impacts are considered substantial, except for cumulative air quality conditions (i.e., the SCAB is a non-attainmentbasin) and the Project would not cause any cumulative impacts to become substantial. As discussed inSection 2.5.b. of this document, the Project's contribution to the cumulative air quality scenario is notconsiderable because emissions would be short term (during construction) and would be below theconstruction emissions thresholds set by the SCAQMD. Therefore, the proposed Project does not havea Mandatory Finding of Significance due to cumulative impacts. Therefore, the Project would be Less Than Significant Impact. No mitigation is required.
c. Does the Project have environmental effects which will cause substantial adverse effects on human beings, either directly or indirectly?
D
D
WHY? As discussed in Sections 2.5, 2.12, and 2.19 of this document, the proposed Project would notexpose persons to the hazards of toxic air emissions, chemical or explosive materials, flooding, ortransportation hazards. Section 2.11 discusses the potential for ADL contaminated soil and VOC or perchlorate contamination in groundwater, both of which could be disturbed during construction.Measures HAZ-2, HAZ-4 and HAZ-5 would ensure proper testing would occur for these contaminantsprior to the start of construction. If testing identifies contamination in levels that are considered hazardous, these measures would also ensure that a remediation and disposal plan be prepared and implementedduring construction to ensure protection for construction workers, the general public, and to ensure thatthese hazardous materials are not spread to other areas where they could contribute to other unforeseen impacts to the environment. With implementation of these mitigation measures, the Project is notexpected to cause direct or indirect adverse effects on human beings as they relate to hazardousmaterials.
In addition, as discussed in Sections 2.3 Aesthetics, 2.13 Land Use and Planning, 2.15 Noise, 2.16Population and Housing, 2.17 Public Services, 2.18 Recreation, 2.19 Transportation/Traffic and 2.20Utilities and Service Systems the Project would not indirectly cause substantial adverse effects onhumans.
Therefore, the proposed Project would not have a Mandatory Finding of Significance due toenvironmental effects that could cause substantial adverse effects on humans. Therefore, the Projectwould be Less Than Significant Impact. No mitigation is required.
Mitigation Measures:
Please see the measures BIO-1 through BIO-7, CUL-1 afi4-throy3h_CUL-2, TCR-1 through TCR-5, and HAZ-1 through HAZ-10.
Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 85
INITIAL STUDY REFERENCE DOCUMENTS
1) Alquist-Priolo Earthquake Fault Zoning Act, California Public Resources Code, revised January 1, 1994 official Mt. Wilson, Los Angeles and Pasadena quadrant maps were released March 25, 1999.
2)_CAL FIRE. 2008. California Fire htazard Severity Zone Map Update Project: Sacramento County FHSZ Map. <http://www.fire.ca.gov/fire_prevention/fhsz_maps_sacramento> (accessed 4/19/2018).
3) California Air Resources Board. 2022. 2022 Scoping Plan for Achievino Carbon Neutrality. httDS://ww2.arb.ca.aov/sites/defaulVfiles/2023-04/2022-SD.Ddf (accessed 2/16/2024). 4)^^^alifornia AiLResoyrces Board^2Q23. Current California GHG Emission Inventory Data. <https://ww2.arb.ca.flov/flhc]-inventorv-data>. (accessed 2/16/2024). 2)5) California Air Resources Board. 2022. Maps of State and Federal Area Designations. < https ://ww2 ,arb. ca. a ov/reso u rces/documents/maDS-state-and-federal-area-designations>. (accessed 2/16/2024).
346) California Attorney General's Office. 2010. Addressing Climate Change at the Project Level.
Available at: <www.ag.ca.gov/globalwarming/pdf/GW_mitigation_measures.pdf> (accessed 4/19/2018).
4)7}_Caltrans 2018. Natural Environment Study (Minimal Impacts) (NES) for Holly Street Bridge Seismic Retrofit and Rehabilitation Project. Prepared by Dokken Engineering. §)8}_Caltrans 2018. Historic Property Survey Report (HPSR)/Archaeological Survey Report (ASR) for Holly Street Bridge Seismic Retrofit and Rehabilitation Project. Prepared by Dokken Engineering.
CONFIDENTIAL - NOT FOR PUBLIC DISTRIBUTION
6)9}_Caltrans 2018. Historic Property Evaluation Report (HRER)/Finding of No Adverse Effect with and without Standard Conditions for Holly Street Bridge Seismic Retrofit and Rehabilitation Project.Prepared by G PA. 7)10}.Caltrans 2018. hlazardous Waste Initial Site Assessment (ISA) for Holly Street Bridge Seismic Retrofit and Rehabilitation Project. Prepared by Dokken Engineering. §)j_llCDC. 2014. Farmland Mapping and Monitoring Program: Sacramento County. Available at:
<http://www.conservation.ca.gov/dlrp/fmmp/Pages/Sacramento.aspx> (accessed 4/18/2018). 8)121CEQA Air Quality Handbook, South Coast Air Quality Management District, revised 1993 40413) East Pasadena Specific Plan Overlay District, City of Pasadena Planning and Development Department, codified 2001
44414) Energy Element of the General Plan, City of Pasadena, adopted 198345^15) Fair Oaks/Orange Grove Specific Plan Overlay District, City of Pasadena Planning and Development Department codified 2002
+3416) Final Environmental Impact Report (FEIR) Land Use and Mobility Elements of the General Plan, Zoning Code Revisions, and Central District Specific Plan, City of Pasadena, certified 2004 44).U}_2000-2005 Housing Element of the General Plan, City of Pasadena, adopted 2002. 4^18) Inclusionary Housing Ordinance Pasadena Municipal Code Chapter 17.71 Ordinance #6868 4€)19LLand Use Element of the General Plan, City of Pasadena, adopted 200447)20)_Mobility Element of the General Plan, City of Pasadena, adopted 20044§)21LNoise Element of the General Plan, City of Pasadena, adopted 2002 Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 86 49422) Noise Protection Ordinance Pasadena Municipal Code Chapter 9.36 Ordinances # 5118, 6132, 6227, 6594 and 6854
20^23) North Lake Specific Plan Overlay District, City of Pasadena Planning and Development Department, Codified 1997
£4424) Pasadena Municipal Code, as amended22^25) Recommendations On Siting New Sensitive Land Uses, California Air Resources Board, May 2005
23^26) Regional Comprehensive Plan and Guide, "Growth Management Chapter," Southern California Association of Governments, June 1994
24)271_Safety Element of the General Plan, City of Pasadena, adopted 200225)28}_SCAQMD. 2017. Air Quality Plans. Available at: http://www.airquality.org/businesses/air-qualityplans (accessed 04/18/2018). 2^29) Scenic h-lighways Element of the General Plan, City of Pasadena, adopted 1975\27430) Seismic hlazard Maps, California Department of Conservation, official Mt. Wilson, Los Angeles and Pasadena quadrant maps were released March 25, 1999. The preliminary map for CondorPeak was released in 2002. 28431) South Fair Oaks Specific Plan Overlay District Planning and Development, codified 199828432) State of California "Aggregate Resource in the Los Angeles Metropolitan Area" by David J.
Beeby, Russell V. Miller, Robert L. Hill, and Robert E. Grunwald, Miscellaneous map no. .010, copyright 1999, California Department of Conservation, Division of Mines and Geology SO)33J_Storm Water and Urban Runoff Control Regulations Pasadena Municipal Code Chapter 8.70 Ordinance #6837
^4^34) Transportation Impact Review Current Practice and Guidelines, City of Pasadena, August, 200533435) Tree Protection Ordinance Pasadena Municipal Code Chapter 8.52 Ordinance # 6896S3436) West Gateway Specific Plan Overlay District, City of Pasadena Planning and Development Department codified 2001
34^37) Zoning Code, Chapter 17 of the Pasadena Municipal Code Holly Street Bridge Seismic Retrofit Project Initial Study January 2025 Page 87 Appendix A — Biological Database Search Results
USFWS - IPAC Species List
CNDDB GIS Database Search
NMFS - West Coast Region - California - Species List Mapping Tool CNPS species lists for the USGS 7 Vi minute quadrangles of Pasadena Holly Street Bridge Seismic Retrofit Project Initial Study August 2024
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hlolly Street Bridge Seismic Retrofit Project Initial Study August 2024 ^>!c!>'l.ot'M
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^ United States D epartm ent of the Interior
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FISH AND WILDLIFE SERVICE
Carlsbad FishAnd Wildlife Office
2177 Salk Avenue - Suite 250
Carlsbad, CA9200S-73S5
Phone: (760) 431-9440 Fax: (760) 431-5901
htto://www.fws.eov/carlsbad/
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In Reply Refer To:
Consultation Code: 08ECAROO-2018-SLI-0492
Event Code: 08ECAROO-2018-E-01111
Project Name: Holly Street Bridge Rehabilitation
February 05, 2018
Subject: List of threatened and endangered species that may occur in your proposed project location, and/ormay be affected by your proposed project To Whom It May Concern:
The enclosed species list identifies threatened, endangered, and proposed species, designated critical habitat, and candidate species that may occur within the boundary of your proposed project an d/or may be affected by your proposed project. The species list fulfills the requirements of the U.S. Fish and Wildlife Service (Service) under section 7(c) of the Endangered Species Act (Act) of 1973, as amended (16 U.S.C. 1531 etseq.).New inform ati on based on updated surveys, changes in the abundance and distribution of species, changed habitat conditions, or other factors could change this list. Please feel free to contact us if you needm ore current infonn ati on or assistance regarding the potential impacts to federally proposed, listed, and candidate species and federally designated and proposed criticalhabitat. Please note that under 50 CFR402.12(e) of the regulations implementing section 7 of the Act, the accuracy of this species list should be verified after 90 days. This verification can becompleted formally or informally as desired. The Service recommends that verification becompleted by visiting fhe ECOS-IPaC website at regular intervals during project planning and implementation for up date s to species lists andinfonnation. An updated list may be requested through the ECOS-IPaC system by completing the same process used to receive the enclosed list.The purpose of the Act is to provide a means whereby threatened and endangered species and the ecosystems upon which they depend may be conserved. Under sections 7(a)(l) and7(a)(2) of the Act audits implementing regulations (50 CTR 402 etssq.). Federal agencies are required toutilize their authorities to carry out programs for the conservation of threatened and endangered species and to determine whether projects may affect threatened and endangered species and/ordesignated critical habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-2 02/05/2018 Event Code; 08ECAROO-2018-E-01111
2 A Biological Assessment is required for construction projects (or other undertakings havingsimilar physical impacts) that are major Federal actions significantly affecting the quality of thehuman environment as defmed in the National Environmental Policy Act (42 U. S. C. 4332(2) (c)). For projects other than major construction activities, the Service suggests that a biologicalevaluation similar to a Biological Assessment be prepared to determine whether the project mayaffect listed or proposed species and/or designated or proposed critical habitat. Recommendedcontents of a Biological Assessment are described at 50 CFR 402. 12.If a Federal agency determines, based on the Biological Assessment or biological evaluation, that listed species and/or designated critical habitat may be affected by the proposed project, the agency is required to consult with the Service pursuant to 50 CFR 402, In addition, the Servicerecommends that candidate species, proposed species and proposed critical habitat be addressedwithin the consultation. More information on the regulations and procedures for section 7consultation, including the role of permit or license applicants, can be found in the "Endangered Species Consultation Handbook" at:
http://www.fws.gov/endangered/esa-library/pdf/TOC-GLOS.PDF Please be aware that bald and golden eagles are protected under the Bald and Golden EagleProtection Act (16 U.S.C. 668 et seq.), and projects affecting these species may requiredevelopment of an eagle conservation plan (http://www.fws.gov/windenergy/eagle_guidance.html). Additionally, wind energy projects should follow the wind energyguidelines (http://www.fws.gov/windenergy/) for minimizing impacts to migratory birds andbats.Guidance for minimizing impacts to migratory birds for projects including communications towers (e.g., cellular, digital television, radio, and emergency broadcast) can be found at: http://www.fws.gov/migratorybirds/CurrentBirdIssues/Hazards/towers/towers.htm; http:// www.towerkill.com; andhttp://www.fws.gov/migratorybirds/'Cun-entBirdIssues/Hazards/towers/comtow.html.
We appreciate your concern for threatened and endangered species. The Service encourages Federal agencies to include conservation of threatened and endangered species into their projectplanning to further the purposes of the Act. Please include the Consultation Tracking Number in the header of this letter with any request for consultation or correspondence about your projectthat you submit to our office.
Attachment(s):
• Official Species List
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-3 02/05/2018 Event Code: 08ECAROO-2018-E-01111 1
Official Species List
Tliis list is provided pursuant to Section 7 of the Endangered Species Act and fulfills the requirement for Federal agencies to "request of the Secretary of the Interior information whether any species which is listed or proposed to be listed may be present in the area of a proposedaction".Tliis species list is provided by:
Carisbad Fish And WUdIife Office2177 Salk Avenue - Suite 250Carlsbad, CA 92008-7385(760)431-9440 Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-4 02/05/2018 Event Code: 08ECAROO-2018-E-01111 2
Project Summary
Consultation Code: 08ECAROO-2018-SLI-0492
Event Code: 08ECAROO-2018-E-01111
Project Name: Holly Street Bridge Rehabilitation
Proj eot Type: TRANSPORTATION
Project Description: The City of Pasadena, in coordination with the California Department of Transportation (Caltrans), proposes to rehabilitate and seismically retrofitthe existing two-lane Holly Street Bridge CNo. 53C1041) over the Arroyo Seco channel and North Arroyo Boulevard in Los Angeles County. The bridge is located along Holly Street over the Arroyo Seco and North Arroyo Boulevard in the City of Pasadena, Los Angeles County,California within the San Pascual (Garfias) Land Grand (unsectioned portion) of Township 1 North, Range 12 West (San Bemardino Meridian and Baseline), as depicted on the U.S.G.S. Pasadena, California 7.5- minute topographic map.
The existing bridge was constructed in 1925 and is 45.3-feet wide by400.0-feet long. It carries two-lanes of traffic over the Arroyo Seco and North Arroyo Boulevard (one lane in each direction), as well as two sidewalks along its north and south sides with no barrier between thesidewalk and vehicular traffic. The bridge is a concrete arch-deck spanconstructed from cast-in-place concrete. The current Annual Average Daily Traffic (AADT) is 7,453. According to the Caltrans Bridge Inspection Report (BIR), the bridge currently (July 2014) holds asufficiency rating of 36.1 and is classified as Stmcturally Deficient.The proposed project would provide needed rehabilitation and a seismicretrofit to the existing bridge. Bridge retrofit and rehabilitation would include a deck and barrier replacement, luminaire replacement, archway stiffening, joint strengthening, column strengthening, pier capstrengthening, retrofit foundation hold-downs, concrete spall repair, cracksealing, and a bonded grout treatment.
A raised platfonn would be temporarily constructed over the Arroyo Seco concrete channel. North Arroyo Boulevard, and the Class 1 multi-use trail so tliat these routes may remain untouched and functioning for tlieduration of construction. The proposed project would involve the use of adetour and temporary access route. The Holly Street Bridge would beclosed for the period of construction, which would be approximately 18months. A temporary access route would be constructed on the southwestand northeast comers of the bridge from Linda Vista Avenue and ArroyoBoulevard, which would involve vegetation removal and grading.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-5 02/05/2018 Event Code: 08ECAROO-2018-E-01111
3 The maximum depth of excavation is anticipated at 15 feet below groundsurface. Drilling for piles will occur at a depth of approximately 50 feetbelow ground surface in select portions of the APE. Construction stagingis proposed in a 10,272-square-foot area approxiinately 1,500 feet northof the bridge in Parking Lol I ofBrookside Park.Ch'erhead electric and telephone utilities along the bridge may need to berelocated to accommodate the bridge rehabilitation. In addition, atelephone conduit utility attached to the side of the bridge inay reqiiire temporary relocation. Additional electrical and gas utilities will be added to the bridge.
Riglit-of-way (ROW) impacts are expected to be minima], with partialROW acquisitions and temporary constmction easenients (TCEs) required. Temporan' constniction easements and utility relocations would occur as a result oftlie proposed project since an access road on the westside and east side of North Arroyo Boulevard would need to becoiistmcted in order to allow contractors to access the bridge.The bridge is on the eligible bridge list for rehabilitation tlirough the Higliway Bridge Program (HBP) under lump sum funds for the Federal Traiisportalion Improvemeiit Program (FTIP). 'nie proposed project isfederally funded and requires compliance with both tlie National Environmental Policy Act (NEPA) and the Califoniia EnvironmentalQuality Act (CEQA). The lead agency for the CEQA compliance is theCity of Pasadena; the federal lead agency for NEPA compliaiice isCaltraiis.
Project Location:
Approximate location of the project can be viewed in Google Maps: https:// www. eooele.com/maos/Dlace/34.14891357291017N118.1 656167673 5944W r" ^
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4 Counties: Ix>s Angeles, CA
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-7 02/05/2018 Event Code: 08ECAROO-2018-E-01111
5 Endangered Species Act Species
There is a total of 4 threatened, endaiigered, or candidate species on this species list. Species on this list should be considered in an effects analysis for your project and could include species that exist in another geographic area. For example, certain fish may appear on the species list becausea project could affect downstream species. See tlie "Critical habitats" section below for thosecritical habitats that lie wholly or partially witliin your project area under this office's jurisdiction. Please contact the designated FWS office if you have questions.Birds NAME STATUSCalifornia Condor Gymnogyps californianus Endangered Population: U.S.A, only, except where listed as an experimental populationThere is final critical habitat for this species. Your location is outside the critical liabitat Species profile: https://ecos.fws.gov/ecp/species/8193
Least Bell's Vireo Vireo bellii pusillus Endangered
There is final critical habitat for this species. Your location is outside the critical habitatSpecies profile: https://ecos.fws.gov/ecp/species/5945 Flowering Plants
NAME STATUSBraunton's Milk-vetch Astragalus brauntonii Endangered There is final critical liabitat for this species. Your location is outside the critical habitat Species profile: https://ecos.fws.gov/ecp/3pecies/5674
Nevin's Barberry Berberis nevmii Endangered
There is final critical habitat for this species. Your location is outside the critical habitat Species profile: https://ecos.fws.gov/ecp/species/8025
Critical habitats
THERE ARE NO CRITICAL h4ABITATS WITHIN YOUR PROJECT AREA UNDER THIS OFFICE'SJURISDICTION. hlolly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-8 ^^fc I
^^
Selected Elements by Common Name
California Department of Fish and Wildlife
California Natural Diversity Database
Query Criteria: Quad<span style='color;Red'> IS </span>(Pasadena (3411822)) Species Element Code Federal Status State Status
Rare PlantRank/CDRW
Global Rank State Rank SSC or FP
American badger
Taxidea taxus
American peregrine falcon
Falco peregrinus anatum
bank swallow
Riparia n'parla
burrowing owl
Athene cuntoufaria
coast horned lizard
Phrynosoma blalnvlllll
Coast Range newt
Tartoha torosa
Coulter's goldflelds
Lasthenia glabrata ssp. coufteri
Crotch bumble bee
Bombus cmtchti
Greata's aster
SymphyoMchum greatae
hoary bat
Laslurus clneisus
least Belt's vireo
Vireo hellii pusillus
Los Angeles sunflower
Helianthus nuttallll ssp. parish//
mesa horkelia
Horkella cuneafa var. puherula
Nevin's barberry
Benberis nevlnll
pallid bat
Antrozous pallidus
Parish's gooseberry
Ribes dlvancatum var. parishii
Parry's spineflower
Chomanthe parryi var. panyl
Plummer's mariposa-lily
Calochortus plummerae
salt spring checkerbloom
Sldakxe neomexfcana
silver-haired bat
Lastonyctens noctlvagans
AMAJF04010 None None
ABNKD06071 Delisted Delisted
ABPAU08010 None ThreatenedABNSB10D10 None None
G5 S3 SSC
G4T4 S3S4 FPG5 S2G4 S3 SSC
ARACF12100 NoneAAAAF02032 None
PDAST5LOA1 NoneIIHYM24480 NonePDASTEBOUO NoneAMACC05030 None None
NoneNoneNoneNoneNone
G3G4G4G4T2G3G4
02G5
ABPBW01114 Endangered Endangered GST2
PDAST4N102 NonePDROSOW045 None
None
None
PDBER060AO Endangered Endangered
AMACC10010 None None
PDGR002DF3 NonePDPGN040J2 None
PMLILOD150 NonePDMAL110JO NoneAMACC02010 None
NoneNone
None
None
None
G5THG4T1G1
G5G5TXG3T2
G404G5
S3S4S452
S1S2S2S4S2SH
S1S1S3sxS2
S4S2
S3S4
sscssc
1B.11B.3
1A1B.1
1B.1
ssc
1A1B.14.2
28,2
Commercial Version - Dated February, 2 2018 - Biogeographic Data BranchReport Printed on Friday, February 09,2018
Information Expires 8/2/2018
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-9 A, w Selected Elements by Common Name California Department of Fish and Wildlife California Natural Diversity Database
Species Element Code
Rare PlantRank/CDRW
Federal Status State Status Global Rank State Rank SSC or FP slender-horned spineflower
Dodecahema leptoceras
smooth tarplant
Centromadia pungens ssp. laevls
Sonoran maiden fern
Thelypteris puberufa var. sonorensls
southern California legless lizard
Annlella stebblnsi
Southern Coast Live Oak Riparian Forest
SouUiem Coast Live Oak Riparian Forest
southern grasshopper mouse
Onychomys forrklus ramona
southern mountain yellow-legged frog
Rana muscosa
Southern Sycamore Aider Riparian Woodland
Southern Sycamore Aider Riparian Woodland
southern tarplant
Centromadla panyi ssp. australls
southwestern willow flycatcher
Empidonax Iraillli extlmus
western mastiff bat
Eumops perotis callfomicus
western pond turtle
Emys marmorata
western yellow bat
Lasiurus xanthinus
white rabbit-tobacco
Pseudognaphallum leucocephalum
PDPGNOV010PDAST4ROR4PPTHE05192
ARACC01060
CTT61310CAAMAFF06022
AAABH01330CrT624DOCAPDAST4ROP4ABPAE33043
Endangered
None
NoneNone
NoneNone
Endangered
NoneNone
Endangered
AMACD02011 NoneARAAD02030 None
AMACC05070 NonePDAST440CO None
Endangered
None
NoneNoneNone
NoneEndangered
None
None
EndangeredNone
NoneNoneNone
G1G3G4T2G5T3
G3G4G5T301
G4G3T2G5T2G5T4G3G4
G5G4
S1S2
S2S3S4S3
S1S4S2S1
S3S4S3S3S2
1B.1
18.1 2B.2ssc
sscWL
1B.1
ssc
sscssc28.2
Record Count: 34
Commercial Version - Dated February, 2 2018 - Biogeographic Data BranchReport Printed on Friday, February 09,2018
Information Expires 8/2/2018
hlolly Street Bridge Seismic Retrofit Project Initial Study August 2024 PageA-10 Althea Asa ro
From:
Sent:
To:
Subject:
Althea AsaroThursday, February 8, 2018 3:10 PM'[email protected]' Caltrans, District 7 - Holly Street Bridge Seismic Retrofit and Rehabilitation Program To Whom It May Concern,
Quad Name Pasadena
Quad Number 34118-B2
ESA Anadromous Fish
SONCC Coho ESU (T) -CCCCohoESU(E).CC Chinook Salmon ESU (T) - CVSR Chinook Salmon ESU (T) -
SRWR Chinook Salmon ESU (E) -
NC Steelhead DPS (T) -
CCCSteelheadDPS(T).
SCCCSteelheadDPS(T).SCSteelheadDPS(E)- X
CCVSteelheadDPS(T)-
Eulachon (T) -
sDPS Green Sturgeon (T) -
ESA Anadromous Fish Critical Habitat
SONCC Coho Critical Habitat -
CCC Coho Critical Habitat -CC Chinook Saknon Critical Habitat -CVSR Chinook Salmon Critical Habitat - SRWR Chinook Salmon Critical Habitat -
NC Steemead Critical Habitat -
CCC Steelhead Critical Habitat -SCCC Steelhead Critical Habitat -SC Steelhead Critical Habitat -CCV Steelhead Critical Habitat - Eulachon Critical Habitat -sDPS Green Sturgeon Critical Habitat - ESA Marine Invertebrates
1 Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-11 Range Black Abalone (E) -
Range White Abalone (E) -
ESA Marine Invertebrates Critical Habitat
Black Abalone Critical Habitat -
ESA Sea Turtles
East Pacific Green Sea Turtle (T) -
Olive Ridley Sea Turtle (T/E) -Leatherback Sea Turtle (E) -North Pacific Loggerhead Sea Turtle (E) - ESA Whales
Blue Whale (E) -Fin UTiale (E) -
Humpback 'Whale (E) -
Southeni Resident KiUer Wiale (E) -
North Pacific Right Whale (E) -
Sei Wliale (E) -
Sperm Whale (E) -
ESA Pinnipeds
Guadalupe Fur Seal (T) -
Steller Sea Lion Critical Habitat -
Essential Fish Habitat
Coho EFH -Chinook Salmon EFH -Groundfish EFH -Coastal Pelagics EFH -HigMy Migratory Species EFH - MMPA Species fSee list at left)ESA and MMPA Cetaceans/Pinnipeds See list at left and consult the NMFS Long Beach office 562-980-4000
MMPA Cetaceans -
MMPA Pinnipeds -
2 Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-12 Points of contact are the following;
City of Pasadena - CEQA lead agency
Tiffiny Tran, Associate Engineer
Pasadena Public Works Department
100 Garfield Ave., Room N306Pasadena, CA 91101
Caltrans, District 7 - NEPA lead agency
Gary Iverson, Environmental Branch Chief
Local Assistance
100 South Main Street
Los Angeles, CA 90012
Best regards,
Althea Asaro, M.A., RPA
Environmental Planner/Archaeologist
DOKKEN ENGINEERING
110 Blue Ravine Road, Suite 200, Folsom, CA 95630
Phone:(916)858-0642 - Fax:(916)858-0643
3 Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-13 CN PS L/»^t^<?'(-^i/w» /7-f^t^^ /JiK*»i?r ^x?o^'<'^*^
.nventory of Rare and Endangered Plants
14 matches found. CSich on scientific name for detatis
Search Criteria
Cafifornia Rare Plant Rank is oneof[1A,1B, 2A, 2B, 3], Found in Quad S'! 11822 Blooming CA Rare StatePeriod Plant Rank Rank
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Bertieris nevinii
^SatmmaJla-iaaiTA^I.L southern tarplant Asteraceae annual herb May-Nov 1B.1 Nevin.sbar.e^ Berbendaceae ^^ „„ ^M- 1B.1
Ceritromadia pungensChorizanthe parr/i var
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Dodecahema leptpcerasHeliarthus nuttallii ssfL
parishii
Hort<elia cuneatavar.
pubenila
smooth tarplant Asteraceae annual herb
Parry's spin efl awe r Polygonaceae annual herbslender-hdrnedspineflower LosAngelessunflower
mesa horkelia
Polygonaceae annual herb
Apr-SepApr-JunApr-Jun
Rosaceas perennial herb Feb- Jul(Sep)
LaSttienigglafirataSStL coufter'sgoldflelds Asteraceae annual herb Fel>Jun coLilteri Linanthus concinnus
leucocephalLirnRibes divaricatum var.
parishii
San Gabriellinanthus
white rabbittobacco
Parish'sgoo seb err/
Polemoniaceae annual herb
Asteraceae perennial herb
Apr-Jul
(Jul)AugNov (D ec)
salt springchecks rbloom Sidalcea neorne;<icana
SyiQ.Otiyotrichum greatae Greata's aster
Malvaceae
Asteraceae
perennial herb Mar-Jun
perennial
rhizomatousherb J un-Oct
1B.1
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Suggested Citation
California Native Plant Society, Rare Plant Program, 2018. Inventory'of Rare and Endangered Plants of California (online edition, v8-03 0.39). Website http:/Awww.rareplants.cnps.org [accessed 09 February 2018]. noiiy oireei onage oeismic neironi rrojeci iniiiai oiuay Mugusi^u^^t rage M-1 ^ Search the Inventory
Advanced Search
Glcssaro
InformationAbout the Inventory
About the Rare Plant Program
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Questions and Comments
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© Copyright 2010-2018 California Native Plant Society, All rights reserved.
Contributors
The Calflora DatabaseThe California Lichen Society.California Natural aversitv DatabaseThe Jeoson Flora ProjectThe Consortium of California HerbariaCalPhotos Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page A-15 Appendix B — Special Status Species Potential Table
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024
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Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 BEB LS II brtus? ^eniraCffaBiat'lEKesc'rtpffdn' Habltart ;||^^^i. Occurrence 3 Present Amphibian Species
arroyo toad Anaxyrus californicus
Fed:State:CDFW:
Essc
The species is a relatively small toadnative to coastal regions of Central andSouthern California. The speciesbreeds in vegetated streams withmuddy or sandy bottoms and slowmoving or backwater areas. Majorthreats to the species include habitatloss and predation by introducedbullfrog species.
A
Presumed Absent: The only streamchannel within the Biological Study Area(BSA) is the Arroyo Seco channel. Thechannel is concrete lined and does notsupport stream channel vegetation ormuddy/sandy substrate required by thespecies. The nearest occurrence of thespecies is approximately 10 miles fromthe BSA within the San GabrielleMountains from 2016. The species ispresumed absent from the BSA based ona lack of suitable habitat.
Coast Range newt Taricha torosa
Fed:State:CDFW: ssc
Most commonly inhabits valley-foothillhardwood, valley-foothill hardwoodconifer, coastal scrub and mixedchaparral communities, but may utilizeannual grassland and mixed coniferhabitats. In southern California inhabitsdrier chaparral, oak woodlands andgrasslands. Adults require surfacecover such as rocks, logs, mammalburrows, rock fissures, or human-madestructures. Breeds within intermittentstreams, rivers, permanent and semipermanent ponds, lakes and largereservoirs. Breeds from fall through latespring. In the spring, adults return tosubterranean summer aestivating sites;rarely travels more than 3,300 feetbetween aestivation burrow and breeding site. Migrations are delayeduntil as late as May at higher elevations of the Sierra, (sea level - 6,000 feetabove mean sea level [amsl]).
A
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel. The channel is concrete linedand does not provide subsurface coversuch as rocks, logs, or submergedvegetation. The nearest occurrence of thespecies is approximately 5 miles north ofthe BSA within the San GabrielleMountains from 2013. The species ispresumed absent from the BSA based ona lack of suitable habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-1 Common Name":y1B Species Name Status
southern mountainyellow-legged frog Rana muscosa
Fed:State:CDFW:
EE
General Habitat DescripUon
Inhabits lakes, ponds, meadowstreams, isolated pools, sunnyriverbanks in the mountains of southernCalifornia. Inhabits rocky streams innarrow canyons and in the chaparralbelt. from Palomar Mountain in SanDiego County through the San Jacinto,San Bernardino and San GabrielMountains of Riverside, SanBernardino and Los Angeles counties insouthern California. These formed fourisolated clusters of montanepopulations. In addition, the speciesoccurred as an isolated cluster ofpopulations on Breckenridge Mountain,south of the Kern River in Kern County,and in the Sierra Nevada in Tulare, Inyoand Fresno counties, extending north toMather Pass.
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel. The channel is concrete linedand does not support stream channelvegetation or muddy/sandy substraterequired by the species. The nearestoccurrence of the species isapproximately 8 miles north of the BSAwithin the San Gabrielle Mountains from1970. The species is presumed absentfrom the BSA based on a lack of suitablehabitat and lack of recent (<20 years)occurrences in the project vicinity.
Bird SpeciesAmericanperegrine falcon
Falco peregrinusanatum
Fed:State:CDFW:
DDFP
Inhabits any open landscape but ismore common along coastlines, lakeedges, and river valleys. Specializes inhunting other birds and readily adaptsto urban environments supporting largepigeon populations. Requires high cliffsor skyscrapers for nest sites. Nestinglocation must contain protected cliffs orledges for cover. Breeds early March tolate August. p
Low Potential: The BSA lacks therequisite protected cliffs or ledgesnecessary for nesting and does notcontain adequate wetland habitatpreferred by the species; however,potential surrogate bridge habitat andcliffs are adjacent to the eastern portion ofthe BSA. There are limited CNDDBoccurrences of the species in the region;however, there are numerousobservations of the species within the Cityof Pasadena and along the Arroyo Secorecorded on eBird (eBird 2018). Thespecies is considered to have a low tomoderate potential of occurring within theBSA based regional observations andpresence of marginal habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-2 Common Name ;;E Species Name'^|gt|||| Status
bank swallow Riparia riparia
Fed:State:CDFW:
T
General Habitat Description
A migratory colonial nester inhabitinglowland and riparian habitats west ofthe deserts during spring - fall. Majorityof current breeding populations occuralong the Sacramento and Featherrivers in the north Central Valley withsmaller breeding populations foundalong the Central Coast from Montereyto San Mateo Counties. Requiresvertical banks or cliffs with fine textured/sandy soils for nesting (tunnel andburrow excavations). Nests exclusivelynear streams, rivers, lakes or theocean. Breeds May-July. tJHabitatPresent
A
Potential for Occurrence and Rationale
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel. The channel is concrete linedand does not contain riparian vegetationor sandy cliffs required by the species.The BSA lacks the requisite protectedcliffs or banks necessary for nesting. Thenearest occurrence of the species wasrecorded near the City of Pasadena in1894. The species is presumed absentfrom the BSA based on a lack of suitablehabitat. black swift Cypseloides niger
Fed:State:CDFW: ssc
Returns to California in May where thespecies breeds locally in the SanGabriel Mountains from June throughAugust. Nests in small colonies withinmoist crevices or caves on sea cliffsover the surf, or within cliffs of deepcanyons behind or immediatelyadjacent to waterfalls; species veryspecific with requisite nestingconditions. Species forages over manyhabitats and may undergo longdistance foraging flights.
A
Presumed Absent: The BSA lacks moistcrevices or caves on sea cliffs or withincliffs of deep canyons behind orimmediately adjacent to waterfallspreferred by the species. The nearestoccurrence of the species is in the BSAvicinity from 1986 approximately 9 milesnortheast of the BSA; however, eBird hastwo occurrences less than 3 miles east ofthe BSA recorded in 2012. The species ispresumed absent from the BSA based ona lack of suitable habitat. burrowing owl Athene cunicularia
Fed:State:CDFW: ssc
Species inhabits arid, open areas withsparse vegetation cover such asdeserts, abandoned agricultural areas,grasslands, and disturbed openhabitats. Requires friable soils forburrow construction (below 5,300 feetamsl).
A
Presumed Absent: The BSA is toodensely vegetated for the species andlacks the preferred friable soils. Thenearest occurrence of the species isapproximately 3 miles southeast of theBSA recorded in 1921. The species ispresumed absent from the BSA based ona lack of suitable habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-3 Common Name Species Name Status
coastal Californiagnatcatcher
Polioptilacalifornicacalifornica
Fed:State:CDFW:
Tssc
General Habitat Description
Inhabits arid washes, mesas, and slopes]of coastal hills dominated by dense, low-|growing, drought-deciduous shrubs and|subshrubs of coastal sage scrub. May|also use chaparral, grassland, and]riparian communities when adjacent oi\intermixed with sage scrub vegetation.Breeds February-August (0- 2,500 ft|amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA lacks thearid washes, mesas, and slopes ofcoastal hills preferred by the species. Thenearest occurrence of the species isapproximately 9 miles southeast of theBSA from 2005. The species is presumedabsent from the BSA based on a lack ofsuitable habitat. least Bell's vireo Vireo bellii pusillus
Fed:State:CDFW:
EE
Summer resident of southern Californiainhabiting low riparian habitats in thevicinity of water and dry river bottoms.Prefers willows, baccharis, mesquiteand other low, dense vegetation asnesting sites (below 2000 feet amsl).
A
Presumed Absent: The BSA lacks theriparian habitat, willows, baccharis,mesquite or other low, dense vegetationrequired to support the species. Thenearest occurrence of the species isapproximately 4 miles northeast of theBSA from 2015. The species is presumedabsent from the BSA based on a lack ofsuitable habitat. southwesternwillow flycatcher
Empidonax trailliiextimus
Fed:State:CDFW:
EE
Breeds in riparian habitatscharacterized by dense vegetation inproximity to open water or saturatedsoil. Species is associated with densewillow-covered islands and riparianhabitats at elevations up to 8,000 feetamsi. Breeds in April-August.
A
Presumed Absent: The BSA lacks thedense vegetation in proximity to openwater or saturated soils and willowsdominated by riparian habitat preferred bythe species. The nearest occurrence ofthe species is adjacent to the BSA from1906. The species is presumed absentfrom the BSA based on a lack of suitablehabitat and lack of recent (<20 years)occurrences.
Swainson's hawk Buteo swainsoni
Fed:State:CDFW:
T
Inhabits grasslands with scatteredtrees, juniper-sage flats, riparian areas,savannahs, and agricultural or ranchlands with groves or lines of trees.Requires adjacent suitable foragingareas such as grasslands, alfalfa orgrain fields that support a stable rodentprey base. Breeds March to late Aug.
A
Presumed Absent: The BSA does notcontain potentially suitable ripariannesting habitat and the areas surroundingthe BSA are highly developed and do notprovide foraging habitat for the species.The species is presumed absent from theBSA based on a lack of suitable habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-4 Common Name Species Name Status General Habitat Description western yellowbilled cuckoo Coccyzus americanus occidentalis Fed: State: CDFW: TE Species inhabits riparian forests, alongbroad, lower flood bottoms of largerriver systems. Nests in large blocks ofriparian jungles often mixed withcottonwoods. Nesting appears to bepreferred in riparian forest habitats witha dense understory; requires waternear nesting site. Breeds June- August.
HabitatPresent
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA does notcontain a large river system withassociated riparian habitat necessary forthe species. The nearest occurrence ofthe species is approximately 10 milessouth of the BSA from 2011. The speciesis presumed absent from the BSA basedon a lack of suitable habitat. yellow rail Coturnicops noveboracensis
Fed:State:CDFW: ssc
Species inhabits large treeless mesic orwet habitats including marshes andmeadows dominated by sedges andgrasses typically with water no morethan a foot deep. In winter mostly foundin coastal salt marshes, especially drierareas with dense stands of cordgrass(Spartina sp.). Also found in rice fieldsand damp meadows near the coast.
A
Presumed Absent: The BSA does notcontain treeless mesic or wet marshesand meadows preferred by the species.The nearest occurrence of the species isapproximately 7 miles southwest of theBSA from 2011. The species is presumedabsent from the BSA based on a lack ofsuitable habitat.
Fish Speciesarroyo chub Gila orcuttii
Fed:State:CDFW: ssc
Species only native in streams fromMalibu Creek to the San Luis Rey Riverbasin. Species have been introduced toBig Tujunga Creek and middle SantaAna River tributary between Riversideand Orange Counties. Requiresvegetated streams with muddy or sandybottoms and slow moving or backwaterareas.
A
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel which historically did supportpopulations of Arroyo chub; however, thelower Arroyo Seco was channelized andlined with concrete in the late 1930s andno longer supports the species. Thedistribution of CNDDB speciesoccurrences indicates that the species islocally extirpated from the Arroyo Secobut present in the adjacent San GabrielRiver and Tujunga Creek watersheds.The species is presumed absent basedon the BSA being located outside of thecurrent distribution of the species.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-5 Common Name Species Name
Santa Anaspeckled dace
Rhinichthysosculus ssp. 3
Fed:State:CDFW:
Status General Habitat Description
Species inhabits the San Gabriel and
Santa Ana rivers, preferring shallowgravel and cobble substrate within permanent streams or lakes with
riparian cover. Prefers clear, well
SSC I oxygenated water with movement from
currents or waves with a supply ofaquatic plants and insects. Breeds in the summer months.
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel. The channel is concrete linedand does not contain the requisitevegetated permanent streams withshallow gravel and cobble substratebottoms for the species. The nearestoccurrence of the species isapproximately 9 miles northwest of theBSA in the San Gabrielle RiverWatershed from 2013. The species ispresumed absent from the BSA based ona lack of suitable habitat Santa Ana sucker Catostomus santaanae
Fed:State:CDFW: ssc
Endemic to Los Angeles basin southcoastal perennial streams. Preferssteams containing riparian vegetation,coarse substrates for algae foraging(gravel, cobble, and a mixture of gravelor cobble with sand), and shallow riffleareas and deeper runs and pools ofcool clear water. Breeds April-July.
A
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel. The channel is concrete linedand is not the requisite coastal perennialstreams with riparian vegetation. Thenearest occurrence of the species isapproximately 9 miles northwest of theBSA in the San Gabrielle Mountains from2002. The species is presumed absentfrom the BSA based on a lack of suitablehabitat Mammal Species S^^£s;American badger Taxidea taxus
Fed:State:CDFW: ssc
Prefers treeless, dry, open stages ofmost shrub and herbaceous habitatswith friable soils and a supply of rodentprey. Species also inhabits forestglades and meadows, marshes, brushyareas, hot deserts, and mountainmeadows. Species maintains burrowswithin home ranges estimated between338-1,700 acres, dependent onseasonal activity. Burrows arefrequently re-used, but new burrows A
Presumed Absent: The BSA does notcontain the treeless, dry, open stages ofshrub and herbaceous habitat preferredby the species. The nearest occurrence ofthe species is approximately 3 milessouthwest of the BSA with no provideddate. The species is presumed absentfrom the BSA based on a lack of suitablehabitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-6 Common Name Species Name Status General Habitat Description may be created nightly. Young are tiornin March and April within burrows dug inrelatively dry, often sandy, soil, usuallyin areas with sparse overstory cover.Species is somewhat tolerant of humanactivity, but is sensitive to automobilemortality, trapping, and persistentpoisons (up to 12,000 feet amsl).
Habitat
Present
Potential for Occurrence and Rationale
big free-tailed bat Nyctinomops macrotis
Fed:State:
CDFW: ssc
Species is rare in California. Records ofthe species are found scatteredthroughout southern California. Prefersrugged, rocky canyons and roosts inbuildings, caves, crevices of high cliffs or rock outcrops and occasionally withintree holes. Young born June - July; notbelieved to breed within California (upto 8,000 feet amsl).
A
Presumed Absent: The BSA does notcontain the rugged, rocky canyonspreferred by the species. The nearestoccurrence of the species isapproximately 7 miles west of the BSA.During the January 101", 2018 and April24, 2024 biological surveys, the Holly Street bridge was assessed for evidenceof bat habitation. No sign of bat habitation(i.e. guano, urine staining) wereobserved. The species is presumedabsent from the BSA based on a lack ofsuitable habitat. pallid bat Antrozous pallidus
Fed:State:CDFW: ssc
Inhabits low elevations of deserts,grasslands, shrub lands, woodlandsand forests year-round. Most commonin open, dry habitats with rocky areasfor roosting. Forages over open groundwithin 1-3 miles of day roosts. Preferscaves, crevices, and mines for dayroosts, but may utilize hollow trees,bridges and buildings. Roosts mustprotect bats from high temperatures.Very sensitive to disturbance ofroosting sites. Maternity colonies formearly April and young are born April-July(below 10,000feetamsl).
A
Presumed Absent: The southernmostportion of the BSA contains disturbed oakwoodland habitat potentially suitable forthe species; however, there are no openforaging sites in or adjacent to the BSA.During the January 10th, 2018 and April24. 2024 biological surveys, the HollyStreet bridge was assessed for evidenceof bat habitation. No sign of bat habitation(i.e. guano, urine staining) wereobserved. The nearest occurrence of thespecies is less than 1 mile east of the BSAfrom 1910. The species is presumedabsent from the BSA based on lack ofsuitable habitat and lack of recent (<20years) occurrences.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-7 Common Name g;|g| Species Nair»||ggg|g|Status General Habitat Description San Diego desertwoodrat
Neotoma lepidaintermedia
Fed:State:CDFW: ssc
Inhabits moderate to dense canopiedrocky areas from San Diego County toSan Luis Obispo County. Prefershabitat with rock outcrops, rocky cliffsand slopes for nesting, food caching,and predator escape. Breeds Octoberto May, depending on habitat conditions(0 - 8,500 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA does notcontain canopied rocky areas with rockoutcrops of rocky cliffs preferred by thespecies. The nearest occurrence of thespecies is approximately 8 miles west ofthe BSA from 2006. The species ispresumed absent from the BSA based onlack of suitable habitat. southerngrasshoppermouse (Ramonagrasshoppermouse)
Onychomystorridus ramona
Fed:State:CDFW: ssc
Species prefers flat sandy valley floorhabitats with friable soils including alkaliand desert scrub habitats with low tomoderate shrub cover. Breeds fromMay to July, but may begin as early asJanuary under ideal conditions. In CA,the species ranges southward from LosAngeles County to the Mexican border,generally west of desert.
A
Presumed Absent: The BSA does notoccur within alkali and desert scrubhabitats required by the species. Thenearest occurrence of the species isapproximately 2 miles north of the BSAfrom 1904. The species is presumedabsent from the BSA based on lack ofsuitable habitat and lack of recent (<20years) occurrences.
Townsend's bigeared bat Corynorhinus townsendii
Fed:State:CDFW: ssc
Species occurs throughout CA in allhabitats except subalpine and alpinecommunities. Requires caves, minetunnels, or buildings for day and nightroosts. During the spring and summermales are solitary but females formsmall maternal colonies of usually lessthan 100 individuals. Each colony has asmall home range and colonies arewidely spaced, usually at least 10 miapart. The species prefers to foragenear mesic sites with large insectpopulations and preys on small moths,beetles, and other insects. In colderclimates, hibernates through winter insmall hibernacula. The species isextremely sensitive to humandisturbance, especially of maternalcolonies (CDFW 2000). Young bornMay - June.
A
Presumed Absent: The BSA does notcontain the requisite caves, mine tunnels,or buildings for day and night roosts forthe species; however, the bridge mayprovide suitable roosting habitat. Duringthe January 10th, 2018 and April 24, 2024biological surveys, the Holly Street bridgewas assessed for evidence of bathabitation. No sign of bat habitation (i.e.guano, urine staining) were observed.The BSA is also highly disturbed fromhuman activities, of which the species issensitive. The nearest occurrence of thespecies is 8 miles east of the BSA from2015. The species is presumed absentfrom the BSA based on lack of suitablehabitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-8 Common Name Species Name Status
western mastiff bat Eumops perotis californicus
Fed:State:CDFW: ssc
General Habitat Description
Inhabits many open, semi-arid to aridhabitats, including conifer anddeciduous woodlands, coastal scrub,grasslands, and chaparral. Prefersopen, rugged, rocky areas wheresuitable crevices are available for dayroosts. Roosts in cliff face crevices(usually granite or consolidatedsandstone), high buildings, trees andtunnels. Roosting sites must have aminimum 10-foot vertical drop. Birthsearly April through August orSeptember (sea level - 8,500 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA doescontain disturbed oak woodland habitattrees may provide roosting habitat;however, it does not contain open,rugged, rocky areas where suitablecrevices available for day roosts. Duringthe January 10th, 2018 and April 24. 2024biological surveys, the Holly Street bridgewas assessed for evidence of bathabitation. No sign of bat habitation (i.e.guano, urine staining) were observed.The nearest occurrence of the species is8 miles southwest of the BSA from 1991.The species is presumed absent from theBSA based on lack of recent (<20 years)occurrences and a lack of suitableroosting habitat. western red bat Lasiurus blossevillii
Fed:State:CDFW: ssc
Species roosts primarily in trees (2-40feet) protected from above with openareas below for foraging and near edgehabitats adjacent to streams, fields, orurban areas.
A
Presumed Absent: The BSA doescontain large trees; however, areassurrounding the BSA are urbanized anddo not provide suitable foraging habitat forthe species. During the January 10th,2018 and April 24, 2024 biologicalsurveys, the Holly Street bridge wasassessed for evidence of bat habitation.No sign of bat habitation (i.e. guano, urinestaining) were observed. The nearestoccurrence of the species is 9 milesnortheast of the BSA from 2015. Thespecies is presumed absent from the BSAbased on a lack of suitable habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-9 Common Name Species Name Status
western yellow bat Lasiurus xanthinus
Fed:State:CDFW: ssc
General Habitat Description
Species known in California only in LosAngeles and Counties south of SanBernardino to the Mexican border.Inhabits valley foothill riparian, desertriparian, desert wash and palm oasishabitats in proximity to water. Speciesutilizes trees and palms for roosting andmaternity colonies. Births in June andJuly (below 2,000 feet amsl).
Habitat
Present
p
Potential for Occurrence and RationalePresumed Absent: The southernmostportion of the BSA contains disturbed oakwoodland habitat potentially suitable fortree roosting; however, the nearestoccurrence is approximately 3 miles eastof the BSA from 1984. During the January10th, 2018 and April 24, 2024 biologicalsurveys, the Holly Street bridge wasassessed for evidence of bat habitation.No sign of bat habitation (i.e. guano, urinestaining) were observed. The species ispresumed absent from the BSA based onlack of recent (<20 years) occurrences.
Reptile Species
California glossysnake
Arizona elegansoccidentalis
Fed:State:CDFW: ssc
Occurs from the eastern part of the SanFrancisco Bay Area south tonorthwestern Baja California. Absentalong the central coast. The species ismost common in desert habitats butalso occur in chaparral, sagebrush,valley-foothill hardwood, pine-juniper,and annual grass. Elevation from belowsea level to 6,000 ft. Prefer open sandyareas with scattered brush, but alsofound in rocky areas, most common inarid regions.
A
Presumed Absent: The BSA does notcontain desert habitats and open sandyareas with scattered brush preferred bythe species; however, sagebrush doesoccur throughout the southern portions ofthe BSA. The nearest occurrence of thespecies is approximately 7 milesnorthwest of the BSA from 1937. Thespecies is presumed absent from the BSAbased on lack of suitable habitat and lackof recent (<20 years) occurrences.
California leglesslizard Anniella sp. 1
Fed:State:CDFW: ssc
The California legless lizard is a newspecies within the Anniella pulchracomplex of legless lizards and has notyet been assigned a specific epithet.This form of legless lizards is found inthe foothills and mountains surroundingthe southern San Joaquin Valley as wellas the foothills and mountains ofVentura County and western LosAngeles County. Found in a variety ofhabitats with moist, loose soils.
A
Presumed Absent: The BSA does notcontain moist, loose soils preferred by thespecies; however, the westernmostportion of the BSA is at the base of afoothill. The nearest occurrence of thespecies is approximately 9 miles west ofthe BSA from 2009. The species ispresumed absent from the BSA based onlack of suitable habitat and a lack ofoccurrences near the BSA.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 PageB-10 Common Name IS Species Name Status General Habitat Description Present coast horned lizard Phrynosoma blainvillii
Fed:State:CDFW: ssc
Inhabits valley-foothill hardwood,conifer and riparian habitats, as well aspine-cypress, juniper woodlands,chaparrai, and coastal scrub. Withinthese communities, the speciesrequires a micro habitat of sandy soilsfor burying, open areas for sunning, andshrub cover for protection. The speciespredominantly feeds on ants but willalso eat other small insects if they areabundant. The species is most commonin sandy washes and flood plains.
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA contains amoderate canopy of disturbed oakwoodland habitat likely too dense for thespecies, and lacks requisite baskingareas. The nearest occurrence of thespecies is approximately 6 miles north ofthe BSA. The species is presumed absentfrom the BSA based on a lack of suitablehabitat. coastal whiptail Aspidoscelis tigris stejnegeri
Fed:State:CDFW: ssc
The species inhabits hot, dry areas withsparse foliage and open areas inforests, woodland, chaparral, andriparian areas. Diurnal with breedingoccurring from May to August. Dietprimarily includes termites as well asother lizards, insects, spiders,scorpions and small animals. Occursfrom sea level to 7,000 feet amsl. p
Low Potential: The BSA does containthe hot, dry climate with sparse foliageand open areas preferred by the species.The nearest occurrence of the species isapproximately 8 miles northeast from2000. The species is considered to havea low potential of occurrence in the BSAdue to presence of potentially suitablehabitat. southern Californialegless lizard Anniella stebbinsi
Fed:State:CDFW: ssc
Species inhabits coastal sand dunesand a variety of interior habitats,including sandy washes and alluvialfans. Occurs in moist warm loose soilwith plant cover; moisture is essential.Leaf litter under trees and bushes insunny areas and dunes stabilized withbush lupine and mock heather oftenindicate suitable habitat.
A
Presumed Absent: The BSA does notcontain the coastal or sand dunes habitatwith sandy washes or alluvial fanspreferred by the species. The nearestoccurrence of the species isapproximately 4 miles north of the BSAfrom 2015. The species is presumedabsent based on a lack of suitable habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-11 Common Name Species Name Status
two-stripedgartersnake
Thamnophishammondii
Fed:State:CDFW: ssc
General Habitat Description
Species is diurnal, highly aquatic andinhabits locations in proximity topermanent or semi-permanent bodiesof water bordered by dense vegetation.Seasonally alters habitats: in summeroccupies streamside sites and in winteroccupies nearby uplands. Thought toutilize holes, mammal burrows,crevices, and surface objects as nightcover. Births August-November usuallyin secluded sites such as under theloose bark of rotting logs or in densevegetation near pond or streammargins (0 - 8,000 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel. The channel is concrete linedand does not contain the body of waterbordered with dense vegetation preferredby the species. The nearest occurrence ofthe species is approximately 9 milesnortheast of the BSA from 2013. Thespecies is presumed absent based on alack of suitable habitat. western pondturtle Emys marmorata
Fed:State:CDFW: ssc
A fully aquatic turtle of ponds, marshes,rivers, streams and irrigation ditcheswith aquatic vegetation. Requiresbasking sites and suitable uplandhabitat (sandy banks or grassy openfield) for reproduction (sea level to4,690 feet amsl).
A
Presumed Absent: The only streamchannel within the BSA is the Arroyo Secochannel. The channel is concrete linedand does not provide deep pools or otheraquatic habitat necessary for the fullyaquatic species. The nearest occurrenceof the species is approximately 7 milessoutheast of the BSA from 1971. Thespecies is presumed absent based on alack of suitable habitat and lack of recent(<20 years) occurrences.
Plant SpeciesBrand's starphacelia Phacelia stellaris
Fed:State:CNPS: 1B.1
An annual herb inhabiting open areas ofcoastal sage scrub, coastal dunes, andcoastal scrub communities. FlowersMarch - June (sea level - 1,300 feetamsl).
A
Presumed Absent: The project areadoes not contain open areas of coastalsage scrub, coastal dunes, or coastalscrub communities supportive of thespecies. The nearest occurrence of thespecies is approximately 10 milessoutheast of the BSA from 1935. Thespecies is presumed absent from the BSAbased on a lack of suitable habitat andlack of recent (<20 years) occurrences.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-12 Common Name Species Name Status
Braunton's milkvetch Astragalus brauntonii Fed: State: CNPS: E1B.1 General Habitat Description
A perennial herb inhabiting disturbedareas in chaparral, valley grassland,and coastal sage scrub communities.Usually occurs in sandstone soils withcarbonate layers. Flowers January -August (10 - 2,000 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA contains
Iprimarily disturbed areas not suitable for
the species. The nearest occurrence of the
Species is approximately 8 miles east of(he BSA from 2013. The species isbresumed absent based on a lack ofIsuitable habitat.
California sawgrass Cladium californicum
Fed:State:CNPS: 2B.2
A perennial grass inhabiting freshwatermarsh and swamp (often alkaline),meadow and seep communities.Flowers June - September (200 - 2,000feet amsl).
A
Presumed Absent: The BSA does notcontain requisite freshwater marsh and^wamp, meadow, or seep communities for [the species. The nearest occurrence of the
[species is approximately 8 miles east of]the BSA from 1861. The species isbresumed absent based on a lack ofSuitable habitat and lack of recent (<20 [years) occurrences.
Coulter's goldfields Lasthenia glabrata ssp. coulteri
Fed:State:CNPS: 1B.1
The species is an annual herb thatinhabits playas, coastal salt marshes,swamps, and vernal pool communities.Flowers February - June (Sea level4,000 feet amsl).
A
[Presumed Absent: The BSA does notlcontain requisite playas, coastal salt^narshes, swamps, or vernal pool communities for the species. The nearest
occurrence of the species is an 1882|recording approximately 0.5 mile east of ^he BSA. The species is presumed absent
Ibased on a lack of suitable habitat and lack
]of recent (<20 years) occurrences.
Davidson's bushmallow Malacothamnus davidsonii
Fed:State:CNPS: 1B.2
A perennial deciduous shrub inhabitingslopes and washes of chaparral,cismontane woodland, coastal scruband riparian woodland communities.Flowers June - January (600 - 2,800feet amsl). p
Presumed Absent: The BSA containsdisturbed oak woodland habitat potentially[suitable for the species; however, theInearest occurrence of the species islapproximately 10 miles northwest of the]BSA from 2003. In addition, the distribution^>f the species within Los Angeles County is focused in the western San Gabrielle
fVlountains. The species is presumedlabsent from the BSA based on the BSA|being located outside the knownyistribution of the species.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-13 Common Name Species Name Status General Habitat Description Davidson'ssaltscale
Atriplex serenanavar. davidsonii
Fed:State:CNPS: 1B.2
An annual herb inhabiting alkalinebluffs, coastal bluff scrub, or coastalscrub communities. Flowers April -October (30 - 700 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA does notcontain alkaline bluffs, coastal bluff scrub,or coastal scrub communities preferredby the species. The nearest occurrence ofthe species is approximately 7 milessouthwest of the BSA from 1902. Thespecies is presumed absent based on alack of suitable habitat and a lack ofrecent (<20 years) occurrences.
Greata's aster Symphyotrichum greatae
Fed:State:CNPS: 1B.3
A perennial rhizomatous herb inhabitingdamp places in canyons or mesic areasof broadleaf upland forest, chaparral,cismontane woodland, lower montaneconiferous forest, and riparianwoodland communities. Flowers JuneOctober (1,000 - 6,600 feet amsl).
A
Presumed Absent: The BSA does notcontain the damp vegetative habitatpreferred by the species. The nearestoccurrence of the species isapproximately 8 miles north of the BSAfrom 2014. The species is presumedabsent based on a lack of suitable habitat.
Los Angelessunflower
Helianthus nuttalliissp. parishii
Fed:State:CNPS: 1A
A perennial rhizomatous herb inhabitingdamp meadows, marshes, andswamps, of both coastal salt andfreshwater. Flowers August - October(30 - 5,500 feet amsl). Species ispresumed extinct in CA by CNPS.
A
Presumed Absent: The BSA does notcontain the damp meadows, marshes,swamps, from coastal salt and freshwaterhabitats preferred by the species. The lasttime the species was observed was 1937and it is believed to be extinct. lucky morningglory Calystegia felix
Fed:State:CNPS: 1B.1
An annual rhizomatous herb found inwet or mesic locations includingwetlands, marshes, ripariancommunities, meadows, and seeps.Recent occurrences indicate thatirrigated landscapes provide surrogatehabitat. Flowers March - September.Elevation range unknown.
A
Presumed Absent: The BSA does notcontain the wetlands, marshes,meadows, riparian, and seeps preferredhabitats by the species. The nearestoccurrence of the species isapproximately 4 miles southwest of BSAfrom 1899. The species is presumedabsent from the BSA based on a lack ofsuitable habitat and lack of recent (<20years) occurrences.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-14 |Common Maine': |j Species 'NanrWiJ|^^|'Status':'';:;'' iGeneral Habitat Description many-stemmeddudleya
Dudleysmulticaulis
Fed:State:CNPS: 1B.2
A perennial herb often found within clayheavy soils, chaparral, coastal scrub,valley and foothill grasslandcommunities. Flowers April-July (50 -2,600 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA does not
contain the clay heavy soils, chaparral,coastal scrub, or valley and grasslandcommunities preferred by the species;however, disturbed oak woodland is[present in the BSA. The nearestloccurrence of the species is approximately[7 miles southwest of the BSA from 1925.[The species is presumed absent from theIBSA based on a lack of suitable habitat and fack of recent (<20 years) occurrences.
mesa horkelia Horkelia cuneata var. puberula
Fed:State:CNPS: 1B.1
A perennial herb inhabiting dry sandy orgravelly substrate, coastal chaparral,cismontane woodlands, and coastalscrub. Flowers February - September(230 - 2,600 feet amsl).
A
Presumed Absent: The BSA does not
contain the dry, sandy or gravellySubstrate, coastal chaparral, or^ismontane woodlands habitat preferred|by the species. The nearest occurrence of the species is approximately 4 miles
Isouthwest of the BSA from 1967. TheSpecies is presumed absent from the BSAbased on a lack of suitable habitat and lack|of recent (<20 years) occurrences.
Nevin's barberry Berberis nevinii
Fed:State:CNPS:
EE1B.1
A perennial evergreen shrub inhabitingsandy/gravelly soils within washes,chaparral, cismontane woodland,coastal scrub and riparian scrubcommunities. Flowers March - June(900 - 2,700 feet amsl). p
Presumed Absent: The BSA contains
[disturbed oak woodland and chaparralHabitat potentially suitable for the species;^nd, the nearest occurrence of the species |s approximately 1 mile south of the project,
Irecorded in 1961. The nearest recentloccurrence is located approximately 9^niles northwest of the BSA from 2007. The[species was not observed during thepanuary 2018 general biological surveys orcuring a follow up focused survey fconducted on March 14"', 2018 and again
bn April 24. 2024 during the blooming[season for the species. The species isbresumed absent from the BSA based onNegative survey results.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-15 Common Name Species Name Status
Parish'sbrittlescale Atriplex parishii
Fed:State:CNPS: 1B.1
General Habitat Description
An annual herb inhabiting alkaline orclay soils ofchenopod scrub, playas, orvernal pool communities. Flowers June- October (80 - 6,200 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA does notcontain playas or vernal poolcommunities required by the species. Thenearest occurrence of the species isapproximately 9 miles west of the BSA.The species is presumed absent from theBSA based on a lack of suitable habitat inthe BSA.
Parish'sgooseberry
Ribes divaricatumvar. parishii
Fed:State:CNPS: 1A
A deciduous shrub inhabiting moistriparian woodland communities.Flowers February - April (200 - 1,000feet). Known from fewer than fivehistorical occurrences. Last seen in1980 at Whittier Narrows NatureCenter, Los Angeles County. Recentsurveys unsuccessful; believed to beextirpated in CA. Likely extirpated dueto a combination of dry years, alteredstream flows, human-caused fires,habitat loss, and invasive species.
A
Presumed Absent: The BSA does notcontain the moist riparian woodlandcommunities preferred by the species.The nearest occurrence of the specieswas recorded in what is now downtownPasadena in 1893. And there are noregional occurrences newer than 1981.The species is presumed absent from theBSA based on a lack of suitable habitat inthe BSA and lack of recent (<20 years)occurrences.
Parry's spineflower Chorizanthe parryi var. parryi
Fed:State:CNPS: 1B.1
An annual herb inhabiting sandy orrocky openings of chaparral, coastalscrub, cismontane woodland, andvalley and foothill grasslandcommunities. Flowers April - July (900-4,000 feet amsl). p
Presumed Absent: The BSA containsdisturbed oak woodland habitatpotentially suitable for the species;however, the nearest occurrence of thespecies is approximately 2 miles north ofthe BSA from 1919. The species ispresumed absent from the BSA based ona lack of recent (<20 years) occurrences.
Peruvian dodder
Cuscutaobtusiflora var.glandulosa
Fed:State:CNPS: 2B.2
An annual parasitic vine inhabitingfreshwater marsh communities onherbs such as Alternanthera sp., Daleasp., Lythrum sp., Polygonum sp., andXanthium sp. Flowers July - October(50-1,600 feet amsl).
A
Presumed Absent: The BSA does notcontain freshwater marsh communitiesrequired by the species. The nearestoccurrence of the species isapproximately 8 miles southeast of theBSA from an unspecified date. Thespecies is presumed absent from the BSAbased on a lack of suitable habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-16 Common Name Species Name Status
prostrate vernalpool navarretia
Navarretiaprostrata
Fed:State:CNPS: 1B.1
General Habitat Description
An annual herb inhabiting vernal pool,coastal scrub, meadows and seeps,and alkaline valley and foothillgrassland communities. Flowers April -July (50-2,300 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA does notcontain requisite vernal pool, meadows,or seeps for the species. The nearestoccurrence of the species isapproximately 6 miles southwest of theBSA from 1907. The species is presumedabsent from the BSA based on a lack ofsuitable habitat and lack of recent (<20years) occurrences. round-leavedfilaree
Californiamacrophylla
Fed:State:CNPS: 1B.2
An annual herb inhabiting clay soils andopen sites of valley and foothillgrassland and cismontane woodlandcommunities. Flowers March - May (50- 4,000 feet amsl).
A
Presumed Absent: The BSA does notcontain requisite openings within valleyand foothill grasslands for the species.The nearest occurrence of the species isapproximately 1 mile south of the BSAwith an unspecified date. The species ispresumed absent from the BSA based onlack of suitable habitat. salt springcheckerbloom
Sidalceaneomexicana
Fed:State:CNPS: 2B.2
A perennial herb inhabiting alkaline,mesic soils within alakine springs,marshes; chaparral, coastal scrub,lower montane coniferous forest,Mojavean desert scrub and playas.Blooms March - June (50 - 5,000 feetamsl).
A
Presumed Absent: The BSA does notcontain the mesic habitat required by thespecies. The nearest occurrence of thespecies is located approximately 2 milesnorth of the BSA and was recorded in2003. The species is presumbed absentbased on a lack of mesic habitat for thespecies.
San Bernardinoaster
Symphyotrichumdefoliatum
Fed:State:CNPS: 1B.2
A perennial rhizomatous herb inhabitingnear ditches, streams, and springs ofcismontane woodland, coastal scrub,lower montane coniferous forest,meadows and seep, marsh and swamp,and vernally mesic valley and foothillgrassland communities. Flowers July -November (5 - 6,700 feet amsl).
A
Presumed Absent: The BSA does notcontain the species-preferred drainageditches, streams, or springs; the onlywater in the BSA is the concrete-linedArroyo Seco Flood Control Channel. Thenearest occurrence of the species isapproximately 8 miles southwest of theBSA from 1893. The species is presumedabsent from the BSA based on a lack ofsuitable habitat and lack of recent (<20years) occurrences.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-17 Common Name Species Name Status
San FernandaValley spineflower
Chorizanthe parryivar. fernandina
Fed:State:CNPS:
PTE1B.1
General Habitat Description S
An annual herb inhabiting sandyplaces, generally in coastal or desertscrub communities, but may also occurwithin Valley and Foothill Grassland.Flowers April - July (500 - 4,000 feetamsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA doescontain areas of disturbed chaparralscrub habitat potentially suitable for thespecies; however, the regionaldistribution of the species is concentratedwest of the BSA within the San FernandaValley. The nearest occurrence of thespecies is approximately 7 miles west ofthe BSA and was recorded in 1890. Thespecies is presumed absent from the BSAbased on the Project being locatedoutside of the geographic distribution ofthe species.
San Gabrielbedstraw Galium grande
Fed:State:CNPS: 1B.2
A deciduous shrub found in openbroad-leaved forest, chaparral,cismontane woodland, and lowermontane coniferous forestcommunities. Flowers January - July(1,400-5,000 feet amsl).
A
Presumed Absent: The BSA isapproximately 900 feet amsl, which isoutside of the species elevation range.The nearest occurrence of the species isapproximately 8 miles east of the BSAfrom 2003. The species is presumedabsent from the BSA based on a lack ofsuitable habitat.
San Gabriellinanthus
Linanthusconcinnus
Fed:State:CNPS: 1B.2
An annual herb inhabiting dry, rockyslopes and openings of chaparral, andlower and upper montane coniferousforest communities. Flowers April - July(5,600 - 9,200 feet amsl).
A
Presumed Absent: The BSA doescontain the dry, rocky slopes andopenings preferred by the species. Thenearest occurrence of the species isapproximately 6 miles north of the BSAfrom 2003 but the BSA is far below theelevation range of the species. Thespecies is presumed absent based on alack of suitable habitat.
San Gabrielmanzanita
Arctostaphylosglandulosa ssp.gabrielensis
Fed:State:CNPS: 1B.2
An evergreen perennial shrub found onrocky soils within chaparralcommunities. Known only from MillCreek Summit divide in the San GabrielMountains. Blooms in March (2,000 -4,800 feet amsl).
A
Presumed Absent: The BSA does notcontain rocky soils within chaparralcommunities preferred by the species.The nearest occurrence of the species isapproximately 9 miles northeast of theBSA from 2011. The species is presumedabsent based on a lack of suitable habitat.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-18 Common Name Species Name Status
slender-hornedspineflower
Dodecahemaleptoceras
Fed:State:CNPS:
EE
General Habitat Description
An annual herb inhabiting alluvial sandin coastal scrub, chaparral, andcismontane woodland communities.Flowers April - June (600 - 2,500 feetamsl).
HabitatPresent
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA doescontain disturbed oak woodland habitat;however, it does not contain alluvialsands preferred by the species. 5 milesnorthwest of the BSA from 2003. Thespecies is presumed absent based on alack of suitable habitat. slender mariposalily Calochortus clavatus var. gracilis Fed: State: CNPS: 1B.2 A perennial bulbous herb inhabiting shaded foothill canyons of chaparral, coastal scrub, valley and foothill grassland communities. Flowers March - June (1,000 - 3,300 feet amsl).
A
Presumed Absent: The BSA doescontain disturbed oak woodland habitatand chaparral; however, the species isprimarily confined to the foothills of theSan Gabrielle Mountains and the nearestoccurrence of the species isapproximately 8 miles west of the BSAfrom 2009. In addition, the BSA is located approximately 250 feet below theelevation range of the species. Thespecies is presumed absent from the BSAbecause it is outside of the knowndistribution of the species. smooth tarplant
Centromadiapungens ssp.laevis
Fed:State:CNPS: 1B.1
An annual herb inhabiting alkaline soilsor open, chenopod scrub, meadows,seeps, playas, riparian woodland, andvalley and foothill grasslandcommunities. Flowers April-September(0-2,100 feet amsl).
A
Presumed Absent: The BSA does notcontain the soils or open habitats requiredby the species. The nearest occurrence ofthe species is less than 0.5 mile east ofthe BSA from 1901. The species ispresumed absent based on lack ofsuitable habitat and lack of recent (<20years) occurrences.
Sonoran maidenfern
Thelypterispuberula var.sonorensis
Fed:State:CNPS: 1B.1
A perennial rhizomatous fern herboccurring along streams, seepageareas, and meadows. ReproductiveJanuary - September (200 - 2,000 feetamsl).
A
Presumed Absent: The BSA does notcontain streams, seepage areas, ormeadows required by the species. Thenearest occurrence of the species isapproximately 4 miles north of the BSAfrom 1967. The species is presumedabsent from the BSA based on a lack ofsuitable habitat and a lack of recent (<20years) occurrences.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-19 Common Namegijg Species Name Status
southernmountainsskullcap
Scutellariabolanderi ssp.austromontana
Fed:State:CNPS: 1B.2
General Habitat Description
A perennial rhizomatous herb inhabitinggravelly soils of streambanks, oak orpine woodland, chaparral, cismontanewoodland, and lower montaneconiferous forest communities. FlowersJune -August (1,400 - 6,700 feet amsl).
Habitat
Present
A
Potential for Occurrence and Rationale
Presumed Absent: The BSA does not
contain the gravelly soils of streambanksrequired by the species. The nearestoccurrence of the species isapproximately 7 miles southeast of theBSA from an unspecified date. Thespecies is presumed absent from the BSAbased on a lack of suitable habitat. southern tarplant
Centromadiaparryi ssp.australis
Fed:State:CNPS: 1B.1
An annual herb inhabiting salt marshes,vernally mesic valley and foothillgrassland, vernal pools, coastal scrub,and marsh and swamp margincommunities. Flowers May - November(0-1,400 feet amsl).
A
Presumed Absent: The BSA does notcontain the marshes, vernally mesicvalley and foothill grassland, vernal pools,or marsh and swamp margin communitiesrequired by the species. The nearestoccurrence of the species isapproximately 10 mi southeast of the BSAfrom 2015. The species is presumedabsent from the BSA based on a lack ofsuitable habitat.
Thread-leavedbrodiaea Brodiaea filifolia
Fed:State:CNPS:
ET1B.1
A perennial bulbiferous herb inhabitinggrassland, vernal pools, chaparralopenings, cismontane woodland,coastal scrub, playas, and valley andfoothill grassland communities. Speciesoften occurs within clay soils. FlowersMarch -June (80 - 4,000 feet amsl).
A
Presumed Absent: The BSA does not
contain the grassland, vernal pools,chaparral openings, cismontanewoodland, playas, and valley and foothillgrasslands preferred by the species.Disturbed oak woodland habitat ispresent in the BSA; however, there are nooccurrences of the species within 10 mi ofthe BSA. The species is presumed absentbased on a lack of suitable habitat and noregional occurrences. white rabbittobacco Pseudognaphaliu m leucocephalum
Fed:State:CNPS: 2B.2
A perennial herb inhabiting dry, sandycreek bottoms of chaparral, cismontanewoodland, coastal scrub and riparianwoodland communities. Flowers July -December (0 - 6,700 feet amsl).
A
Presumed Absent: The BSA does notcontain the sandy creek bottomspreferred by the species. The nearestoccurrence of the species is a 1932recording approximately 8 mi northwest ofthe BSA. The species is presumed absentbased on a lack of suitable habitat andlack of recent (<20 years) occurrences.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-20 Federal Designations (Fed):
(FESA, USFWS)E: Federally listed, endangeredT: Federally listed, threatenedPT: Federal proposed, threatenedD: Delisted State Designations (CA):
(CESA,CDFW)E: State-listed, endangeredT: State-listed, threatenedCT: State-candidate, threatenedFP: Fully Protected Other Designations:SSC: DFW Species of Special Concern
California Native Plant Society (CNPS) Designations:•Note: according to CNPS (Skinner and Pavlik 1994), plants on Usts 1B and 2 meet definitions for listing as threatened or endangered under Section 1901, Chapter 10 of the CaliforniaFish and Game Code. ra/s Interpretation Is inconsistent with other detinilions.1A: Plants presumed extinct in California.1B: Plants rare and endangered in California and throughout their range.2: Plants rare, threatened, or endangered in California but more common elsewhere in their range.3: Plants about which need more information; a review list.Plants 1B, 2, and 4 extension meanings:_.1 Seriously endangered in California (over 80% of occurrences threatened / high degree and immediacy of threat)_.2 Fairly endangered in California (20-80% occurrences threatened)_.3 Not very endangered in California (<20% of occurrences threatened or no current threats known) Habitat Presence:Absent [A]: No habitat present and no further work needed.Habitat Present [HP]: Habitat is, or may be present. The species may be present.Present [P]: Species is present.Critical Habitat [CH]: Project footprint is located within a designated Critical Habitat unit, but does not necessarily mean that appropriate habitat is present.Potential for Occurrence Criteria:Present: Species was observed on site during a site visit or focused survey.High: Habitat (including soils and elevation factors) for the species occurs on site and a known occurrence has been recorded within 5 mi of the site.Low/Moderate: Either low quality habitat (including soils and elevation factors) for the species occurs on site and a known occurrence exists within 5 mi of thesite; or suitable habitat strongly associated with the species occurs on site, but no records were found within the database search.Presumed Absent: Focused surveys were conducted and the species was not found, or species was found within the database search but habitat (includingsoils and elevation factors) do not exist on site, or the known geographic range of the species does not include the survey area.Source: Cal-Flora 2018, Cal-Herps2018, CDFG 1994, CDFG 2010, CDFW2018, CBD 2012, CNDDB 2018, CNPS 2018, Gruver2006, Jepson 2018, Mayer1988, Moyle et at. 1995, Shuford 2008, Sullivan 1996, Tesky 1994, UC Davis 2010, UC Davis 2012, USFS 2007, Zeineret al.1990.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 PageB-21
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Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-22 Sources for Special Status Species Table :
Calflora 2018. Calflora, Information on wild California plants for conservation, education, and appreciation.
Available at: <http://www.calflora.org/> (accessed 2/22/2018).
Cal-hlerps 2018. California hlerps, A Guide to the Amphibians and Reptiles of California. Available at:<http://www.californiaherps.com/> (accessed 2/22/2018).
Cal-IPC. 2018. Online California Invasive Plant Inventory Database. Available at: <http://www.cal-ipc.org/paf/> (accessed 1/20/2018).
CDFG. 2010. Evaluation of Petition From the Center for Biological Diversity to List All Populations of the Mountain Yellow Legged Frog (Rana mucosa and Rana sierra) as Endangered. Available at:<http://www.biologicaldiversity.org/species/amphibians/Sierra_Nevada_mountain_yellow-legged_frog/pdfs/2010- 1-25_MYLF_CESA_petition%20.pdf> (accessed 02/21/2018).
CDFG 1994. Staff Report regarding Mitigation for Impacts to Swainson's Hawks (Buteo swainsoni) in the CentralValley of California. Available at: <https://www.dfg.ca.gov/wildlife/nongame/survey_monitor.html> (accessed 2/22/2018).
CDFW2018. CWHR Life History Accounts and Range Maps. Available at:<http://www.dfg.ca.gov/biogeodata/cwhr/cawildlife.aspx> (accessed 2/22/2018).
CBD 2012. Center for Biological Diversity. A petition to list all populations of the Townsend's big-eared bat, Corynorhinus Townsendii and Corynorhinus Townsendii pallescens, as threatened or endangered under theCalifornia Endangered Species Act. Available at: <http://www.fgc.ca.gov/regulations/2012/tbebpetition.pdf> (accessed 2/22/2018).
CNDDB 2018. California Natural Diversity Database, Rarefind 5. Available at:<http://www.dfg.ca.gov/biogeodata/cnddb/> (accessed on 2/20/2018).CNPS. 2018. Inventory of Rare and Endangered Plants. Available at: <http://www.rareplants.cnps.org/> (accessed on 2/22/2018).England, A.S., M.J. Bechard, and C.S. Houston. 1997. Swainson's Hawk (Buteo swainsoni). In: A. Poole and F.
Gill (eds.), The Birds of North America, No. 265. The Academy of Natural Sci., Philadelphia, PA, and The American Ornithologists' Union, Washington, D.C.
Gruver, J.C. and D.A. Keinath. 2006. Townsend's Big-eared Bat (Corynorhinus townsendii): a technicalconservation assessment. USDA Forest Service, Rocky Mountain Region. Available at:
<http://www.fs.usda.gov/lnternet/FSE_DOCUMENTS/stelprdb5181908.pdf> (assessed 52/22/201 8).
Jennings, C.W., R.G. Strans, and T.H. Rogers 1977. Geologic Map of California: California Division of Mines andGeology. Scale 1:750,000.Jepson 2018. Jepson eFlora. Available at: <http://ucjeps.berkeley.edu/IJM.html> (2/22/2018).
Mayer, Kenneth and Laudenslayer, William. 1988. A Guide to Wildlife hlabitats of California. State of California, Resources Agency, Department of Fish and Game; Sacramento, CA. Available at:<http://www.dfg.ca.gov/biogeodata/cwhr/wildlife_habitats.asp> (accessed 2/22/2018).
Moyle, Peter B., Ronald M. Yoshiyama, Jack E. Williams, and Eric D. Wikramanayake. 1995. Fish Species ofSpecial Concern in California. California Department of Fish and Wildlife. Available at:
<https://nrm.dfg.ca.gov/FileHandler.ashx?DocumentlD=83919> (accessed 2/22/2018).
NCRS. 2018. Web Soil Survey, Natural Resource Conservation Service; available at:<http://websoilsurvey.sc.egov.usda.gov/App/WebSoilSurvey.aspx> (accessed 1/10/2018).
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-23 NETR. 2018. Historic Aerials and Topographic Maps for Stanislaus County. Nationwide Environmental Title Research LLC. Available at: <http://www.historicaerials.com/> (accessed 2/22/2018).Norris, R.M. and R.W. Webb 1976. Geology of California. University of California, Santa Barbara: John Wiley &Sons.
Shuford, W.D., and Gardali, T. 2008. California Bird Species of Special Concern: A ranked assessment ofspecies, subspecies, and distinct populations of birds of immediate conservation concern in California. CDFW,Sacramento, CA. Available at: <https://nrm.dfg.ca.gov/Filehlandler.ashx?DocumentlD=10413&inline> (accessed 10/25/16).
Sullivan, Janet. 1996. Taxidea taxus. In: Fire Effects Information System. USDA Forest Service, Rocky MountainResearch Station, Fire Sciences Laboratory. Available at:
<http://www.fs.fed.us/database/feis/animals/mammal/tata/all.html> (accessed 2/21/2018).Tesky, Julie L. 1994. Buteo swainsoni. In: Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Available at:<http://www.fs.fed.us/database/feis/animals/bird/busw/all.html> (accessed 2/21/2018).
UC Davis. 2010. California Fish Website. Available at: <http://calfish.ucdavis.edu/species/> (accessed 2/21/2018).
DC Davis. 2012. California Fish Species: Arroyo chub. Available at <http://calfish.ucdavis.edu/species/?uid=5&ds=241>(accessed on 12/17/2012) U.S. Climate Data. 2018. U.S. Climate Data-Victorville, California. Available at:<http://www.usclimatedata.com/climate/victorville/california/united-states/usca1197> (accessed 2/22/2018).
USFS 2007. Description of 'Ecological Subregions: Sections of the Conterminous United States". United StatesDepartment of Agriculture, Forest Service; Ecosystem Management Coordination. Available at:<http://na.fs.fed.us/sustainability/ecomap/section_descriptions.pdf> (accessed 2/22/2018).USFWS. 2018. Critical Habitat for Threatened and Endangered Species Map. Available at:
<https://ecos.fws.gov/ecp/report/table/critical-habitat.html> (accessed 2/22/2018).
Zeiner, D.C, W.F.Laudenslayer, Jr, K.E. Mayer, and M. White, eds. 1988-1990. California's Wildlife. Vol. l-lll.
CDFG, Sacramento, California.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page B-24 Appendix C — List of Abbreviated Terms
Abbreviation Full Meaning
BMPs Best Management PracticesCARB California Air Resources BoardCCAA California Clean Air ActOCR California Code of RegulationsCDC California Department of ConservationCDFW California Department of Fish and WildlifeCEQA California Environmental Quality ActCFR Code of Federal RegulationsCity City of PasadenaCNDDB California Natural Diversity Data Base CNPS California Native Plant SocietyC02 Carbon dioxideCRLF California Red-Legged Frogdbh Diameter At Breast HeightCDTSC California Department of Toxic Substances ControlEIR Environmental Impact ReportEPA U.S. Environmental Protection AgencyGHG Greenhouse GasHMMP Habitat Mitigation and Monitoring PlanIS/MND Initial Study/ Mitigated Negative DeclarationMLD Most Likely DescendantMS4 Municipal Separate Storm Sewer Systems NOx Nitrogen OxidesN20 Nitrous OxideNAHC Native American hleritage CommissionNPDES National Pollutant Discharge Elimination System Os Ozone
OHWM Ordinary High Water Mark
AQMD Air Quality Management District
PMio Respirable Particulate MatterPRO Public Resources CodeProject Holly Street Bridge Seismic Retrofit ProjectROG Reactive Organic GassesSAAQS State Ambient Air Quality StandardsSIP State Implementation PlanSVAB Sacramento Valley Air BasinSWPPP Storm Water Pollution Prevention PlanUSAGE United States Army Corps of EngineersUSFWS United States Fish and Wildlife ServiceVMT Vehicle Miles TraveledVRF Verification Request Form Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Appendix D — Miticiation Monitoring and Reportinci
Program
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Biological Resources
BIO-1: Construction personnel shall attend biological awarenesstraining provided by a City approved Project Biologist prior to workingwithin the Project area. The biological awareness training shall includea description of special status species and habitats and provide directionto construction workers if any special status species are observed duringconstruction.
Prior toConstruction
City ofPasadena
BIO-2: If any special status wildlife is encountered during the courseof construction, work within the vicinity of the wildlife would stop. Workin the vicinity of the wildlife would not re-commence until the wildlife hasbeen relocated by a qualified biologist, or has left the construction areaof its own volition. The City, or a City representative, would contact CDFWto determine the most appropriate methods of relocation.
DuringConstruction
City ofPasadena/ResidentEngineer/Construction
Contractor
BIO-3: If vegetation removal or initial work on the super structure ofthe bridge is to take place during the nesting season (February 15t -August 31st), a pre-consfruction nesting bird survey must be conductedwithin 1 week prior to the start of construction. The survey must includeall vegetation and potentially suitable structures within the Project vicinityplus a 100-foot buffer. If construction pauses during nesting season forlonger than 1 week, another nesting bird survey is required before workcan be re-initiated during the nesting season.A minimum 300 foot no-disturbance buffer would be established aroundany active nests of raptor species. A 100 foot no-disturbance bufferwould be established around any active nests for other migratory birds.
If an active nest is discovered during construction, the contractor mustimmediately stop work in the nesting area until the appropriate buffer is established. The contractor is prohibited from conducting work that coulddisturb the birds (as determined by the Project biologist and incoordination with wildlife agencies) in the buffer area until a qualified biologist determines the young have fledged. A reduced buffer can be established if determined appropriate by the Project biologist andapproved by CDFW.
Prior to/DuringConstruction
ResidentEngineer/ConstructionContractor
BIO-4: Within 24 hours prior to the start of construction, the Projectbiologist shall survey chaparral habitats within the Project area forpresence of Coastal whiptail. The surveys shall be conducted by walking5 meter (=15 foot) transects and pausing periodically to scan thesurrounding exposed soils with binoculars for presence of the species.
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If Coastal whiptail is discovered during the pre-construction survey, aprotective 50-fool no-work buffer would be established around eachsighting. The Project biologist shall then contact CDFW to determineappropriate active or passive relocation methods.BIO-5: Off road construction vehicles must be operated at or below 5miles per hour while working within Coastal whiptail habitat. Vehiclesused for the initial clearing and grubbing of within Coastal whiptail habitatmust be operated at maximum speeds of 3 miles per hour.
DuringConstruction
ResidentEngineer/ConstructionContractor
BIO-6: Within 1 week prior to the start of construction, a bat surveymust be completed. The survey must include a visual inspection of thebridge structure and any trees that would be removed for signs of batoccupation (i.e. urine staining, accumulation of guano). If evidence of batoccupation is observed, the City would contact CDFW to determineappropriate protective measures.
Prior toConstruction
ResidentEngineer/ConstructionContractor
BIO-7: The outer boundaries of the construction area in proximity tochaparral and mixed oak woodland habitat shall be fenced with highvisibility fencing to prevent construction equipment, constructionpersonnel, or construction debris from impacting the habitat outside theproject area.
Prior to/DuringConstruction
ResidentEngineer/ConstructionContractor
Cultural ResourcesCUL-1: The City of Pasadena, in coordination with the CaliforniaDepartment of Transportation, shall implement the Secretary of Interior'sStandards for the Treatment of Historic Properties Action Plan. Properimplementation requires actions be taken prior to the start ofconstruction, during construction, and after the completion ofconstruction and are outlined in the Summary of the Historic ResourcesAction Plan shown below.
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Summary of Historic Resources Action Plan
Stage Responsible Parties Task Date Complete
Definition of Responsible Party acronyms are: CAM - Cattrans /^chrtectural Historian5; CS - City Staff; PM - CattiEngineer; RE - Resident Engineer. The primary responsible party in each task is noted with an *. s Project Manager; PE - Project
Plan DevelopmenVConstructionDocumentsPlan DevelopmenfConstructionDocumentsPlan Development/ConstructionDocumentsPlan Development/ConstructionDocumentsPlan Development/ConstructionDocuments Plan Development/ConstructionDocumentsPre-Construction/ConstructionPre-Construction/ConstructionPre-Construction/Construction CAM,CS,PM*, PE PM, PE, and CS will provide project plans for bridge at 65%, 95%, and 100% completion to CAH for review.
CAM*, CS,PM,PE
CAH will review the plans for compliance with theRehabilitation Standards and work with the PM, PE,and CS to resolve any outstanding issues.
CAM*, CS CAM will provide formal approval in the form of a memo.PM,PE, RE* The SOIS Action Plan will be included in the Resident Engineer's Pending File.
CAH* CAM will ensure that the SOIS Action Plan will be
included in the Environmental Commitments Record(ECR).
CAM* CAH will review and approve any proposed project
changes to the historic property's character-definingfeatures to ensure that the changes are consistent withthe SOIS Action Plan.
CAH,CS,PM*, PE All responsible parties will agree to an on-site monitoring schedule in accordance with the construction schedule prior to the start of construction.
CAH, CS,PM*, PE
All responsible parties will agree on a methodology forinstalling the scaffolding and platforms, to ensure thathistoric properties are not damaged.
CAH,CS,PM*, PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Mock-up inspection of concrete spall and crack
repair
5Caltrans may elect to have a qualified consultant conduct some of its monitoring responsibilities. In this case, Caltrans PQS would review and approve the consultant's work.
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Pre-Construction/Construction
CAM,CS,PM*, PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Mock-up inspection of the board-Tormed
concrete finish for the concrete strut beams
Pre-Construction/Construction
CAH, CS,PM*,PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Steel rebar installation methodology
Pre-Construction/Construction
CAH,CS,PM*, PE
The on-site monitoring schedule will include inspectionand sequential approval of milestones, at a minimumincluding:
o Mock-up inspection of the board-formed
concrete finish over the steel rebar
Pre-Construction/Construction
CAM* CAH will review and approve any proposed project
changes to the historic property's character-definingfeatures to ensure that the changes are consistent withthe SOIS Action Plan.
During Construction CAM, CS,
PM*, RE
CS, PM, and RE will notify CAM in advance whenevents in the SOIS Action plan requiring monitoring willoccur (including but not limited to those listed in the PreConstruction/Construction Stage, above).
During Construction CAM* CS,
PM, RE
CAM will be present to monitor required constructionevents and will prepare monitoring reports summarizingactivities, results, and next actions.
Post-Construction CAH, CS,
PM*,RE
CS, PM, and PE will notify CAH when construction iscomplete.
Post-Construction CAH,CS,
PM*, RE
CAM will investigate the finished bridge to ensure thatall work was completed according to the plans and thatit complies with the Standards for Rehabilitation.
Post-Construction CAH*, CS,
PM, RE
All responsible parties will work together to resolveoutstanding issues. CAH will provide formal approval inthe form of a memo.
CUL-2: If cultural resources are discovered during constructionprojects in Pasadena that may be eligible for listing in the CaliforniaRegister for Historical Resources, all ground disturbing activities in theimmediate vicinity of the find shall be halted until the find is evaluated bya Registered Professional Archaeologist. If testing determines that DuringConstruction
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significance criteria are met, then the Project shall be required to performdata recovery, professional identification, radiocarbon dates asapplicable, and other special studies; and provide a comprehensive finalreport including site record to the City and the South Central CoastalInformation Center at California State University Fullerton. No furthergrading shall occur in the area of the discovery until Planning Departmentapproves the report.
Hazards and Hazardous MaterialsHAZ-1: Prior to the start of any construction work on the bridge, theCity or its contactor shall test for asbestos in the bridge concrete andbearing pads. The requirement for this testing shall be included in theProject Special Provisions. Remediation of asbestos is required inaccordance with South Coast Air Quality Management District (SCAQMD) Rule 1403 prior to demolition or renovation. Under thefederal asbestos NESHAP, 40 CFR § 61, Subpart M incorporated intoCalifornia air quality regulations by California Health and Safety CodeSection 39658(b)(1) and in compliance with NESHAP regulations, acertified asbestos consultant (CAC) must make definitive conclusionsregarding the presence of ACM. The contractor shall hire a CAC toconduct the testing prior to construction.If hazardous concentrations of asbestos are identified in any structuralelements of the Holly Street Bridge that would be impacted duringconstruction, the CAC shall prepare an asbestos remediation anddisposal plan. This plan will identify specific measures to be taken duringconstruction to contain asbestos containing materials, ensure workerand public safety, and identify a method for handling, transportation, anddisposal of the asbestos containing materials at an appropriatehazardous waste disposal facility.
Prior toConstruction
City ofPasadena/ConstructionContractor
HAZ-2: Prior to the start of construction, the City shall test exposedsoil for aerially deposited lead (ADL) adjacent to Holly Street, Linda VistaAvenue, and North Arroyo Boulevard where such soil would be impactedby construction activities. If soil tests identify hazardous concentrationsof ADL as defined by the State of California Department of ToxicSubstances Control (greater than 80 milligram of lead per kilogram ofearth), the City, or its construction contractor, shall prepare a LeadCompliance Plan prior to the start of construction. This plan must outline Prior toConstruction
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procedures to ensure worker and public safety from ADL that could bedisturbed during construction, as well as identify how the contaminatedsoils would be safely contained, transported and disposed at anappropriate hazardous waste disposal facility.HAZ-3: Prior to the start of any construction work on the bridge, theCity or its contractor shall test bridge and roadway paint for lead andchromium. Remediation of lead paint is required in accordance withSouth Coast Air Quality Management District (SCAQMD) Rule 1403prior to demolition or renovation. A Lead Compliance Plan and WorkPlan for the safe testing, removal, storage, transportation, and disposalof lead paint is required prior to the start of removal work by a contractorto ensure work is performed in compliance with health and safetyrequirements of Title 8 regulations and managed and disposed incompliance with Title 22 regulations. If initial testing identifies lead orchromium is present in paint on the bridge, the contractor will follow therequirements of the Lead Compliance Plan and Work Plan which willprovide methods for safe removal, transportation, and disposal of thelead/chromium materials at an appropriate hazardous waste disposalfacility.
Prior toConstruction
ResidentEngineer/ConstructionContractor
HAZ-4: A site investigation shall be performed to detect anygroundwater contamination, including VOCs and perchlorates, within theProject area. The site investigation shall be performed at any locationswhere excavations would reach a depth of at a minimum of 15 feet belowground surface (bgs) where construction workers would potentially beexposed to groundwater during construction. The site investigationwould involve collection of groundwater samples (groundwater isexpected to be encountered during geotechnical borings) and testing thesamples in a laboratory forVOCs and perchlorate contamination.
If the groundwater testing identifies VOCs or perchlorates, a Contaminated Groundwater Remediation and Disposal Plan shall berequired prior to the start of construction. This plan shall outlineprocedures to ensure worker safety from hazardous groundwatercontaminants, as well as identify how the groundwater and saturatedspoil soils would be safely contained on-site, or transported to ahazardous waste disposal facility during Project construction.
Prior toConstruction
ResidentEngineer/ConstructionContractor
HAZ-5: The contractor shall comply with all applicable regulations andpermit requirements for construction dewatering, which may include DuringConstruction
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laboratory testing, treatment of contaminated groundwater, or otherdisposal options, if groundwater is encountered during the proposedProject.
ConstructionContractor/City ofPasadena
HAZ-6: Prior to construction, the City or its contractor shall inspect theexisting electrical transformers in the project area to determine if anyleaks of hazardous materials have occurred. All electrical equipmentrequiring disposal shall be packaged and transported to an appropriatepermitted disposal facility. Any leaking transformers observed during thecourse of the Project are considered a potential PCB hazard. Thetransformer fluid shall be sampled and analyzed by qualified personnelfor detectable levels of PCBs. Should PCBs be detected, the City or itscontractor shall prepare a PCB Action Plan for the safe containment,removal, transport, and disposal of the transformer and anycontaminated soils from the associated leak. This remediation shall becompleted in accordance with CCR Title 22, Division 4.5.
Prior toConstruction
ResidentEngineer/ConstructionContractor
HAZ-7: If existing wood utility poles require removal duringconstruction, they shall be considered treated wood waste. The City orits contractor is responsible for proper handling, storing, packaging,labeling, transporting, and disposing as treated wood waste under Title22 CA Code of Regulations. All treated wood waste generated by theproject shall be disposed as hazardous waste in a California permitteddisposal facility approved to accept treated wood waste.
DuringConstruction
ResidentEngineer/ConstructionContractor
HAZ-8: If the relocation of either the gas line or concrete pipes areconducted by the City, instead of being relocated by the responsibleutility company, a work plan would be prepared containing the followinginformation: details of the work to be performed, methods for protectionof ground from surface spills and asbestos wrap, testing of content,collection of content, tapping and cutting procedures, transport, anddisposal of hazardous materials. If the City is responsible for relocationof concrete pipe, the concrete pipes need to be tested for asbestos priorto relocation.
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HAZ-9: As is the case for any project that proposes excavation, thepotential exists for the discovery of unknown hazardous materials andcontamination during Project construction. For any previously unknownhazardous waste / material encountered during construction, theprocedures outlined in Table 7.1-1, Unknown Hazards Procedures of theCaltrans' Construction Manual latest revision, dated July 2017, shall befollowed.
DuringConstruction
ResidentEngineer/ConstructionContractor
HAZ-10: To the satisfaction of the Pasadena Fire Department, prior toconstruction, the contractor shall prepare a fire prevention plan to reducethe chances of starting and/or spreading a fire. The prevention plan shallminimally include the placement of fire extinguishers in all equipment.Additionally, the Resident Engineer shall regularly notify the PasadenaFire Department of Project construction activities and schedules and anychanges to such activities and schedules.
Prior to/DuringConstruction
ResidentEngineer/ConstructionContractor
WQ-3: The proposed Project would require a National PollutionDischarge Elimination System (NPDES) General Construction Permit forDischarges of storm water associated with construction activities(Construction General Permit 2012-0006-DWQ). The constructioncontractor shall adhere to the SWRCB Order No. 2012-0006-DWQNPDES Permit pursuant to Section 402 of the CWA. This permitauthorizes storm water and authorized non-storm water discharges fromconstruction activities. As part of this Permit requirement, a SWPPP shallbe prepared prior to construction consistent with the requirements of theRWQCB. This SWPPP would incorporate all applicable BMPs to ensurethat adequate measures are taken during construction to minimize impacts to water quality.
Prior to/DuringConstruction
ResidentEngineer/ConstructionContractor
Public ServicesPS-1: To help minimize the potential for delays in emergencyresponses during construction due to closure of the Holly Street Bridgeand other construction activities, the City Public Works Department shallconsult with the Pasadena Fire Department, Pasadena PoliceDepartment, local hospitals and emergency clinics, and any otheremergency response agencies, to disclose road closures and identifyalternative access and detour routes.
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Recreation - Mitigation MeasuresREC-1: The contractor shall coordinate with City Parks and NaturalResources Department to determine Rose Bowl event dates whenconstruction activities shall be restricted.
Prior to/DuringConstruction
ResidentEngineer/ConstructionContractor
Transportation/Traffic - Mitigation MeasuresTMP-1: The contractor shall prepare and implement a ConstructionStaging and Traffic Management Plan to minimize traffic disruptionduring construction activities. The plan shall be made available to thepublic and affected stakeholders that use the bridge for public access.The following elements shall be included in the plan: parking,detours/road closures, pedestrian/commercial/ residential access, andmedia campaign.
Prior toConstruction
ResidentEngineer/ConstructionContractor
Tribal Cultural Resources - Mitigation MeasuresTCR-1: Retain a Native American Monitor/Consultant: The Cityshall retain and compensate for the services of a Tribalmonitor/consultant who is both approved by the Gabrieleno Band ofMission Indians-Kizh Nation Tribal Government and is listed under theNAHC's Tribal Contact list for the area of the project location. This list isprovided by the NAHC. The monitor/consultant will only be present onsite during the construction phases that involve ground disturbingactivities. Ground disturbing activities are defined by the GabrielenoBand of Mission Indians-Kizh Nation as activities that may include, butare not limited to, pavement removal, pot-holing or auguring, grubbing,tree removals, boring, grading, excavation, drilling, and trenching, withinthe project area. The Tribal Monitor/consultant will complete dailymonitoring logs that will provide descriptions of the day's activities,including construction activities, locations, soil, and any culturalmaterials identified. The on-site monitoring shall end when the projectsite grading and excavation activities are completed, or when the TribalRepresentatives and monitor/consultant have indicated that the site hasa low potential for impacting Tribal Cultural Resources.
Prior toConstruction
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TCR-2: Unanticipated Discovery of Tribal Cultural Resources:
Upon discovery of any potential Tribal Cultural Resources, ceaseconstruction activities in the immediate vicinity of the find until the findcan be assessed. All potential Tribal Cultural Resources unearthed byproject construction activities shall be evaluated by a qualifiedarchaeologist, who meets the Secretary of the Interior's ProfessionalQualification Standards in Archaeology, and by the tribalmonitor/consultant approved by the Gabrieleno Band of Mission IndiansKizh Nation. If the resources are Native American in origin, theGabrieleno Band of Mission Indians-Kizh Nation shall assess whetherthe discovery meets the eligibility requirements to qualify as a TribalCultural Resource pursuant to Public Resources Code (CEQA) Section21074. Should the discovery qualify as a Tribal Cultural Resourcepursuant to CEQA, they will consult with the City regarding avoidancemeasures, or appropriate mitigation treatment, and curation of the TribalCultural Resource. Work shall be diverted to other areas of the Projectuntil the discovery can be assessed and treated.
DuringConstruction
ResidentEngineer/ConstructionContractor
TCR-3: Unanticipated Discovery of Human Remains andAssociated Funerary Objects - Section 5097.94 of the PublicResources Code and Section 7050.5 of the California Health and SafetyCode protect Native American burials. skeletal remains and graveaoods. reaardless of aae and provide method and means for theaDDroDriate handling of such remains. If human remains areencountered, work shall halt in that vicinity and the county coroner shallbe notified immediately. At the same time. an archaeologist shall becontacted to evaluate the situation. If the human remains are of NativeAmerican oriain. the coroner must notify the Native American HeritageCommission within 24 hours of such identification. Further Drovisions_QfPRC 5097.98 are to be followed as applicable.
Identification and Initial Assessment: Native American human remainsare defined in PRC 5097.98 (d)(1) as an inhumation or cremation, andin any state of decomposition or skeletal completeness. Funeraryobjects, called associated grave goods in PRC 5097.98, are also to betreated according to this statute. Health and Safety Code 7050.5 dictatesthat any discoveries of human skeletal material shall be immediatelyreported to the County Coroner. The Resident Engineer shall beresponsible for contacting the County Coroner.
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A work exclusion zone shall be placed around the discovery and withinan area reasonably suspected to overlie adjacent human remains untilthe coroner has determined the nature of the remains. If the coronerrecognizes the human remains to be those of a Native American or hasreason to believe that they are those of a Native American, he or sheshall contact, by telephone within 24 hours, the Native AmericanHeritage Commission (NAHC) and PRC 5097.98 and CEQA Guidelines15064.5(e) shall be followed. This includes the NAHC designating andcontacting the Most Likely Descendent (MLD). Once notified, the MLDhas 24 hours to make recommendations to the City regarding thepreferred treatment of the remains and any associated grave goods.Should a MLD not be identified or should the MLD not respond within 24hours, then the City shall follow CEQA Guidelines 15064.5(e)(2). It is theCity's responsibility to keep the remains secured until reburial or otherappropriate treatment can occur Work may not resume in the discoveryarea until the remains have been removed and the MLD, or in theabsence of a MLD, a qualified archaeologist, has lifted the workexclusion zone limitations.
TCR-4: Gabrielefto Band of Mission Indians-Kizh Nation Humanand Funerary Remains: If the Gabrieleno Band of Mission Indians -Kizh Nation is the designated MLD, the following treatment measuresshall be implemented. To the Tribe, the term "human remains"encompasses more than human bones. In ancient as well as historictimes, Tribal Traditions included, but were not limited to, the burial offunerary objects with the deceased, and the ceremonial burning ofhuman remains. These remains are to be treated in the same manneras bone fragments that remain intact. Associated funerary objects areobjects that, as part of the death rite or ceremony of a culture, arereasonably believed to have been placed with individual human remainseither at the time of death or later; other items made exclusively for burialpurposes or to contain human remains can also be considered asassociated funerary objects.
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Verification of Compliance
Date Remarks (Optional)
TCR-5: Treatment Measures: In the case where discovered humanremains cannot be fully documented and recovered on the same day,the remains will be covered with muslin cloth and a steel plate that canbe moved by heavy equipment placed over the excavation opening toprotect the remains. If this type of steel plate is not available, a 24-hourguard should be posted outside of working hours. The Tribe will makeeveiy effort to recommend diverting the project and keeping the remainsin situ and protected. If the project cannot be diverted, it may bedetermined that burials will be removed. The Tribe will work closely withthe qualified archaeologist to ensure that the excavation is treatedcarefully, ethically and respectfully. If data recovery is approved by theTribe, documentation shall be taken which includes at a minimumdetailed descriptive notes and sketches. Additional types ofdocumentation shall be approved by the Tribe for data recoverypurposes. Cremations will either be removed in bulk or by means asnecessary to ensure complete recovery of all material. If the discoveryof human remains includes four or more burials, the location isconsidered a cemetery and a separate treatment plan shall be created.Once complete, a final report of all activities is to be submitted to theTribe and the NAHC. The Tribe does NOT authorize any scientific studyor the utilization of any invasive diagnostics on human remains.Each occurrence of human remains and associated funerary objects willbe stored using opaque cloth bags. All human remains, funerary objects,sacred objects and objects of cultural patrimony will be removed to asecure container on site if possible. These items should be retained andreburied within six months of recovery.Prior to the continuation of ground disturbing activities, the City and theTribe shall consult on a location for the respectful reburial of the humanremains and/or ceremonial objects. The location of reburial/repatriationshall be within the project footprint or other area which can be protectedin perpetuity from all ground disturbing activities. There shall be nopublicity regarding any cultural materials recovered or reburied.
DuringConstruction
ResidentEngineer/ConstructionContractor
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page D-12 Appendix E — Response to Public Comments
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024
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Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Comment 1.
Gabrieleno Band of Mission Indians/Kizh Nation (received via mail, 07/18/2019) ^^S^,. ^^^ GA&KlFl.r_NO &ANDOF Mia5!ON INDIAN6 - K1ZM NATION it |~listoncalltj Lnown a-s^he ^a" Cjai^nel {^>anJ of Ml;&ston Indians rfecognt2ieJ by t^e ^tate ol(- (^.alrfomia as the abongina! tnl?e o^ t^ LOS y\ngeles basin <., kjwf
Adopt Mitieative Declaration Study/ Mttigated Negatiye peclaration July 18, 2019
City of Pasadena100 North Garfield Avenue, N306Pasadena, CA 91101Good Afternoon James Tong,We have received your Notice of the Adopt Mitigative Negative Declaration for the Holly Street Bridge Seismic Retrofit Project in Pasadena CA. Our Tribal Government would like to be consulted if any ground disturbance will be conducted for this project.Sincerely,Gabrieleno Band of Mission Indians/Kizh Nation (1844)390-07870ffice
Response 1.
Thank you for your comments. The City of Pasadena has already completed consultation with the Gabrieleno Band of Mission Indians - Kizh Nation pursuant to AB 52. A summary of that consultationand resulting measures to mitigate potential impacts is provided in Section 2.20 Tribal Cultural Resourcesof the Initial Studv/Mitiaated Negative Declaration.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page E-1 Comment 2.
Caltrans District 7 (received via mail, 08/09/2019)
STATE OF CAI-IFQRI'l.f.-CAUFORNlA STATE TRANSpaRr«TI<»i ASENCY
DEPARTMENT OF TRANSPORTATION
DISTRICT 7 - Office of Regtonal Planning
100 S. MAIN STREET, SUITE 100
LOS ANGELES, CA 90012PHONE (213)897-c536
FAX (213)897-1337
TTY 711
www.dotca.gov
August 9,2019
James TongCity of Pasadena100N. Garfield Avenue
Pasadena.CA 91101
Ga^News<>iriJ3tp!il!emor
\
Afefring Consenalion aCaUorniaWayolUla.
RE Holfy Street Bridge Seismic Refrofit Project
- Mitigated Negative Declaration (MND)SCH# 2019079063
GTS # 07-LA-2019-026B6
Vic.LA-134/PM:R12.793
Dear Mr, Tong:
Thank you for including the California Department of Transportatton (Caltrans) in theenvironmental review process fcir this Mitigated Negative Declaration ;MND). The Qty, incoordination with Caltrans, propc'ses to rehabilitate and seismicalty retrofit the existing two-lane Holly Street Bridge (No. 53C1041 ) over the Arroyo Seco channel, the Arroyo Seco Trail (a Class 1 multi-use trail), and North Arroyo Boulevard. The proposed project is federally funded and require$ compliance with both NEPA and CEQA. The City of Pasadena is the lead agency under CEQA, and CaltranS is th6 lead agency under NEPA,The nearest State facility to the proposed project is Route 134. After reviewing the MND, Caltransdoes not expect project approval to result in a direct adverse impact to the existing Statetransportation facilities.
As a reminder, any transportatun of heavy construction equipment anj/or materials which requires use of oversized-transport vehicles on State highways will need a Caltrans transportationpermit. We recommend large size truck trips be limited to off-peak commute periods.If there are any temporary constraints affecting local travel during consfructon, advance signageshoutel be deployed, and appropriate public notice provided prior to any such activities.
If you have any questions, please contact project coordinator David Calkins, at [email protected], and refer to GTS # 07-LA-2019-02686. .:~f/' Sincerely,/'' /
MIYA EDMONS(
IGR/CEQA Branch Chief
ec: Scott Morgan, State Clearinghouse
"Pwvide soft. sialamabk. mlcsritlcil anrf (ffictent (rttayorturioB.[)»»,« tv ft tffwcf Ca^nNio 's ecoiuwsy wuf fiwtHfity "
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page E-2 Response 2.
Thank you for your comments. The City of Pasadena does not anticipate the use of heavy construction equipment or oversized-transport vehicles on State highways. However, the City of Pasadena will adhere to Caltrans' requirements for a Caltrans transportation permit in the event that use of heavy construction equipment or vehicles become necessary durina construction. The contractor will be encouragedlo limit large size truck trips to off-peak commute periods.
Traffic disruption during construction activities will be minimized with implementation of Mltigatipn Measure TMP-1, which will provide notice and signaae of parking, detours/road closures, andpedestrian/commercial/residential access.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page E-3 Comment 3.
Sanitation'plstricts of Los Angeles County deceived via mail. 08/02/2019) SANTIATION DI8TBICTS Of tOB AN08LES COIWW
Comwling Waste Info Rwouxes
Roben c. Ferrante
Chief Enameer and General Manager
1955 Workman Mill Road, Whittier. CA 9DB01-iaOO Walling Address: P.O Box 4988, Whirt-ier, CA 90607-4S3S CS62) 699-74)l • www-IWitf.o-S
July 29. 2019
Ref. DOC 5232923
Mr James TongSenior PlannerCity of Pasadena
175 North GsTfield Avenue
Pasadena, CA 91101
Dear Mr. Tong:
N01 ReiiconstC for the Holly Siroct Bridee S<i»mif ttctront Project Tlie Santtatiim Dwiricts of'Los Angeles County (l)islncts) tticcivcd a Notice fif Intent to Adopl a Miti^taj Negative Declaration (N01) for (lie s.ubjeci project on Ju!>' IS, 2019. Tile proposed project is located witliin the jurisdiclionaJ boi.inttarics of District No. 16> We offer the Following comments regarding sewerage sen'ice • The proposed project may impact eusting and/or proposed Districts' facilities (e.g. Irunk sewers, recycled watcrlincs, etc ) over wiiich it will be constructed. Disu'icls' facilitiw arc tot'atcd directly undur tind/ar cross directly beneath the proposed project alignitieni. The Dislricts cannrt issue a drtailcd response (o or perniit construction of the proposed project until projwt pians and specifications that incorpi^rate Districts' facilities arc •submitted for our review. To obtain copies of a.'r*uilt drawings of the Oistricts' facilities within the project limits, please contact the Districts' Engineeriiig Coisnter at cngii«;cringcoi!njlcr''ffllacsd.ort or (562) 908-4288, extension 1205. When project plans thai incorporate our facilities have been prepared, please submji copies ot the same to the Engineering Counter for our review and comment, If you have am' questions, please contact the undersigmd at (562) 908-4288, extension 2717 Ver}' truly yours,
AR:ar
^{^^^f2^
Adriana Raza
Customer Service S)*et:ia)ist
Facilhies Planning Departinent
ec; A. Howard
R. ParacireliesRng. Counter
tKit'i;<l'"< Bit
Prcfttod on
Recided Pap* r
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page E-4 Response 3.
Thank you for your comments. The City of Pasadena has previously identified Los Angeles County utility lines within the project area during initial utility coordination. On December 29, 2017, Dokken Enaineeringsent the Sanitation District a Utility "A" Letter notifying them of the project and requesting As-Build plans for the District's utility lines in the project area. A response from the district and As-Built Plans were received on January 11, 2018. As the environmental phase of the project is nearina completion (2024) the City intends to proceed with final design, as well as right-of-way and utility coordination. Additional coordination with the District is planned and copies of the project plans will be provided as requested inyour comment above, once they are prepared. The City will work with the District to avoid their utility lines where feasible, or coordinate successful relocation when avoidance is not feasible.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page E-5 Comment 4.
California State Clearinghouse (received via mail, 08/16/2019)
STATE OF CALIFORNIA
Governor's Office of Planning and Research
State Clearinghouse and Planning Unit
^T? m •iSS
i ^ /^t 1..4BT
Gavjn N'cwsoin
Govamof
'^-y
(Laic Cordon
Diiectur
August 16. 2019
James TongPasadena, City of
100 N. Oarfield Ave.
Pasadena, CA 9) 101
Subjecr: Molty Street Bridge Seisinic Rfrtrofit Project SCH#: 2019079063
Dear James Tong:
The State Clearinghouse submitted the above named MND to selected state agencies for review. The review period closed on 8;'15/20t9, and the comnncnts from the responding agency (ies) is (are) avaitablc on the CEQA database For your retrieval and use. Ifthis comment package is not in order, please notily theState Clearinghouse immediately. Please refer to (lie project's len-digit State Clearinghouse number in fuhire carrcspoiidcnce so thai we niay respond promptly, Please note that Sectioii 21 )04<c) ot'tlie California Public ResuurcK Code states thai; "A responsible or other public ageticy sliall only make substantive comments regarding thoseactivilies involved in a project wliicli are within an area of expertise of the agciicy or wliicli arc reqiiired to be carried out or approved by die ageiicy. Those comments s tiali be supported by specific documentation."
Check tht CEQA database for subiuittcd coniiucnts For use in preparing your final tnvironnieataldocument: https://ccqanctopr.ca.gov/2019079063/2 . Should you need more infofTnation or clarificationof the coinments, we rwommend that you contact the (ommenting agency dirtctly.
ITiis letter acknowledges that you have complied with the State Clearinghouse review I'equu'ements for draft environmenial documents, pursuant to the California Environmental Qualit)' Act Please contact the State Clearinghouse at (916) 445-0613 ifyou have any qucslioiis regarding the rovironmcntal reviewprocess.Sincerely, A
Scott Morgan
Director, State Clearinghouse
ec: Resources Agency
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page E-6 Response 4.
The project is in compliance with the State Clearinghouse and Planning Unit with the above listed acknowledgement. The project has responded to all public comments and comments from aaency representatives and comments from agency representatives interested in the project.
Holly Street Bridge Seismic Retrofit Project Initial Study August 2024 Page E-7