Pasadena City Council
August 31, 2026

LAT. 1961a. “Cities May Run Out of Room for Outdoor Play in Future.” Newspapers.com: Los Angeles Times, Los Angeles, California, March 12, 1961.

LAT. 1961b. “Two Honored for Aid Given to Girls’ Club.” Newspapers.com: Los Angeles Times, Los Angeles, California, April 9, 1961. Page 349. Newspapers.com.

LAT. 1964. “Girls’ Club Will Offer 5 Classes.” Newspapers.com: Los Angeles Times, Los Angeles, California, September 11, 1964. Page 13. Newspapers.com.

LAT. 1968. “Recreation Urged Along Eaton Wash.” Newspapers.com: Los Angeles Times, Los Angeles, California, March 1, 1968. Page 108. Newspapers.com.

LAT. 1970. “Girls’ Club Sets Signup.” Newspapers.com: Los Angeles Times, Los Angeles, California, June 21, 1970. Page 473. Newspapers.com.

LAT. 1980. “Legislation Workshop.” Newspapers.com: Los Angeles Times, Los Angeles, California, May 25, 1980. Page 514. Newspapers.com.

Cultural Resources Assessment November 4, 2025
85 LAT. 1987. “Earthside Nature Center Offers Annual Wildflower Walkabouts.” Newspapers.com: Los Angeles Times, Los Angeles, California, April 11, 1987.

LAT. 1990. “Girls’ Club of Pasadena Provides Day Care.” Newspapers.com:

Los Angeles Times, Los Angeles, California, May 23, 1990. Page 212.

Newspapers.com.

LAT. 1995. “Elna Bakker; Author and Environmentalist.” Newspapers.com: Los Angeles Times, Los Angeles, California, July 8, 1995. Page 20. Newspapers.com.

Laylander, D. 2000. Early Ethnography of the Californias, 1533–1825. Salinas: Coyote Press Archives of California Prehistory.

Lightfoot, K.G. 2005. Indians, Missionaries, and Merchants: The Legacy of Colonial Encounters on the California Frontiers. Berkeley: University of California Press.

Manley, M. 2013. “How to Successfully Build Out an Urgent Care Center.” Journal of Urgent Care Medicine, Carefree, Arizona, June 1, 2013.
https://www.jucm.com/how-to-successfully-build-out-an-urgent-care-center/.

McCawley, W. 1996. The First Angelinos, the Gabrielino Indians of Los Angeles.

Banning, California: Malki Museum Press.

NEA (Northwest Economic Associates) and C. King. 2004. Ethnographic Overview of the Angeles National Forest: Tataviam and San Gabriel Mountain Serrano Ethnohistory. Prepared for the U.S. Department of Agriculture.

NETR (Nationwide Environmental Title Research). 2025a. Historical Aerial Photographs of the City of Pasadena, CA dating from 1948,1952, 1953, 1964, 1972, 1977, 1978, 1980, 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2004, 2005, 2009, 2010, 2012, 2014, 2016, 2018, 2020, and 2022.

Accessed July 2025. https://www.historicaerials.com/viewer.

NETR. 2025b. Historical Topographic Maps dating from 1894, 1896, 1898, 1900, 1904, 1907, 1908, 1910, 1913, 1915, 1920, 1927, 1928, 1931, 1940, 1941, 1955, 1960, 1968, 1975, 1988, 1994, 1999, 2012, 2015, 2018, and 2022. Accessed July 2025. https://www.historicaerials.com/viewer.

NVE (Nevada Energy). 2017. “Fort Churchill Generating Station.” Revised May 2017.

Accessed January 2025.
https://www.nvenergy.com/publish/content/dam/nvenergy/brochures_arch/about- nvenergy/
our-company/power-supply/Fort_Churchill_Fact_Sheet.pdf.

Norris, R.M., and R.W. Webb. 1990. Geology of California. 2nd Edition. New York: John Wiley & Sons.

Cultural Resources Assessment November 4, 2025
86 O’Connor, P. 1993. Architectural/Historical Development of the City of Pasadena – Historic Context/Property Type Report. Submitted to the California State Office of Historic Preservation. Urban Conservation Section of the City of Pasadena Planning Division. January 13, 1993.

O’Neil, S. 2002. “The Acjachemen in the Franciscan Mission System: Demographic Collapse and Social Change.” Master’s thesis; California State University, Fullerton.

Pacific Legacy Inc. 2007. Cultural Resources Inventory of the Southern California Edison Company Tehachapi Renewable Transmission Project, Kern, Los Angeles and San Bernardino Counties, California, ARR #05-01-01046. On file at the South Central Coastal Information Center.

ParcelQuest. 2025. Assessor data for the subject property ay APN 5754-030-901 in Los Angeles County. Accessed August 6, 2025.
https://pqweb.parcelquest.com/#home.

PDES (Pasadena Daily Evening Star). 1894. “City News.” Newspapers.com: Pasadena Daily Evening Star, Pasadena, California, January 20, 1894. Page 3.

Newspapers.com.

PI (Pasadena Independent). 1952. “L.A. County Unleashed $139,000 Flood Control Project for Valley.” Newspapers.com: Pasadena Independent, Pasadena, California, July 27, 1952. Page 4. Newspapers.com.

PI. 1954. “$30 Million Sought for Flood Work.” Newspapers.com: Pasadena Independent, Pasadena, California, June 23, 1954. Page 31. Newspapers.com.

PP (Pasadena Post). 1943. “$3,462,000 Postwar Flood Control Work Planned.” Newspapers.com: Pasadena Post, Pasadena, California, November 13, 1943.

PS (Pasadena Star). 1911. “Mar Vista Street Extension is Asked.” Newspapers.com:

Pasadena Star, Pasadena, California, November 4, 1911. Page 14.

Newspapers.com.

PS. 1914. “Make Repairs on Eaton Wash.” Newspapers.com: Pasadena Star, Pasadena, California, February 6, 1914. Page 9. Newspapers.com.

PS. 1915. “National Bank is Plan for Park.” Newspapers.com: Pasadena Star, Pasadena, California, July 26, 1915. Page 6. Newspapers.com.

PSN (Pasadena Star News). 1925a. “Co-Operate on Walnut Tunnel.” Newspapers.com:

Pasadena Star News, Pasadena, California, May 8, 1925. Page 1.

Newspapers.com.

PSN. 1925b. “George A. Damon One of Speakers.” Newspapers.com: Pasadena Star News, Pasadena, California, May 13, 1925. Page 10. Newspapers.com.

Cultural Resources Assessment November 4, 2025
87 PSN. 1938. “Signers Now May Solicit Engineers.” Newspapers.com: Pasadena Star News, Pasadena, California, July 29, 1938. Page 13. Newspapers.com.

PSN. 1939. “Rubio Canyon Flood Diversion Included in Engineers’ Report.” Newspapers.com: Pasadena Star News, Pasadena, California, November 28, 1939. Page 10. Newspapers.com.

PSN. 1940. “Eaton Wash Job’s Approval Likely.” Newspapers.com: Pasadena Star News, Pasadena, California, March 26, 1940. Page 13. Newspapers.com.

Reid, H. 1926. The Indians of Los Angeles County. Los Angeles: Privately printed.

Rogers, M.J. 1945. “An Outline of Yuman Prehistory.” Southwestern Journal of Anthropology 1(2): 167–198.

Sierra Club. 1995. California Author’s Legacy to Club. Oakland, California: Sierra Club. 1995. https://vault.sierraclub.org/planet/199509/bakker.asp.

SCE (Southern California Edison). 2023. “Who We Are.” Southern California Edison Company. Accessed December 14, 2025.

Sparkman, P. 1908. “The Culture of the Luiseño Indians.” University of California Publications in American Archaeology and Ethnology 8:187–234.

Tinsley-Becker, W., and C. Chiang. 2015. “HAER CA-2318: Historic American Engineering Record of Southern California Edison Company Substations, Monumental Type.” Prepared by Urbana Preservation and Planning for Southern California Edison Company (Los Angeles County, CA). chrome-extension ://efaidnbmnnnibpcajpcglclefindmkaj/https://memory.loc.gov/master/pnp/habshae r/ca/ca4200/
ca4201/data/ca4201data.pdf.

Tinsley-Becker, W. 2017. “Historic-Era Electrical Infrastructure Management Program: A Program for the Identification, Review, Exemption, and Treatment of Generating Facilities, Transmission Lines, Sub transmission Lines, Distribution Lines, and Substations within the Southern California Edison Company’s Service Territory.” Prepared by Urbana Preservation for the Southern California Edison Company.

Revised 2017.

Trilliant Health. 2024. “The Marked Shift in Urgent Care Utilization: Two Years Later.” Brentwood, Tennessee: Trilliant Health. May 12, 2024.
https://www.trillianthealth.com/market-research/studies/the-marked-shift-in- urgent-care-utilization-two-years-later.

USDA (U.S. Department of Agriculture). 2025. Web Soil Survey. USDA, Natural Resources Conservation Service, Soil Survey Staff. Accessed August 8, 2025. http://websoilsurvey.nrcs.usda.gov.

Cultural Resources Assessment November 4, 2025
88 USGS (U.S. Geological Survey). 2025. National Hydrography Dataset and Watershed Boundary Dataset. Accessed March 2025. https://www.usgs.gov/national- hydrography.

Wallace, W.J. 1955. “A Suggested Chronology for Southern California Coastal Archaeology.” Southwestern Journal of Anthropology 11(3): 214–230.

Warren, C .N. 1968. “Cultural Tradition and Ecological Adaptation on the Southern California Coast.” Eastern New Mexico University Contributions in Anthropology 1(3): 1–15.

Warren, C.N., G. Siegler, and F. Dittmer. 2004. “Paleoindian and Early Archaic Periods.” Submitted to Prehistoric and Historic Archaeology of Metropolitan San Diego: An Historic Properties Background Study. Prepared for Metropolitan Wastewater Department, San Diego, California. Prepared by ASM Affiliates Inc.

Carlsbad, California: ASM Affiliates Inc.

White, R. 1963. “Luiseño Social Organization.” University of California Publications in American Archaeology and Ethnology 48:91–194.

Cultural Resources Assessment November 4, 2025

Appendix A: Personnel Qualifications
1 Monte Kim, PhD

SENIOR ARCHITECTURAL HISTORIAN
Monte Kim (he/him) is a senior architectural historian and historic built environment resource specialist with over 20 years of professional experience in all phases of regulatory compliance under Section 106 and Section 110 of the National Historic Preservation Act (NHPA), Section 4(f) of the Department of Transportation Act, National Environmental Policy Act ( NEPA), and California Environmental Quality Act ( CEQA). He has experience in the inventory and evaluation of resources within the historic built environment, as well as the assessment of effects on historic properties and historical resources and has authored or co-authored nominations for the National Register of Historic Places (NRHP) and has overseen the documentation of historic properties in accordance with the standards required for the Historic American Building Survey (HABS), the Historic American Engineering Record (HAER), and the Historic American Landscape Survey (HALS). He has also developed and implemented resource - specific mitigation measures, treatment plans, protection plans, and interpretive plans for large, transportation-related projects, including the California High-Speed Rail Project. Additionally, he has experience consulting with St ate Historic Preservation Officers and developing programmatic agreements and memorandum of agreement documents for government agencies. Mr. Kim meets the Secretary of the Interior’s Professional Qualification Standards for history and architectural history.

Relevant Project Experience
California Department of Fish and Wildlife Mission Creek Habitat Restoration Project, Santa Barbara County, California. The California Department of Fish and Wildlife (CDFW) retained Dudek to provide a peer review of a mitigated negative declaration (MND) and the supporting cultural resources technical studies for the Mission Creek Habitat Restoration Project. The reports were prepared for Southern California Edison for a project that involved restoration treatments on a 2.88-acre site and the evaluation of historic built resources within the area of potential impacts in conformance with the regulatory requirements of the California Environmental Quality Act. Mr. Kim reviewed the MND and supporting technical studies and found them to be adequate for compliance under CEQA (2023).

Area of Potential Effects Justification & Preliminary Effects Assessment Memorandum for the San Luis Rey Habitat Management Area Wetland Restoration Project, San Diego County, California. Dudek assisted the San Diego County Water Authority (SDCWA) as part of an on-call contract to address comments from the U.S. Army Corps of Engineers (Corps) regarding potential impacts from the San Luis Rey Habitat Management Area Wetlands Restoration Project on a segment of the Second San Diego Aqueduct within the project ’s area of potential effects (APE). The memorandum recommended that SCDWA consider the aqueduct segment within the APE eligible for the National Education
University of California,
Santa Barbara PhD,
History, 2005
California State University,
Sacramento MA,
Public History, 1999
University of California,
Santa Cruz BA,
History, 1996
Professional Affiliations
California Preservation
Foundation
Vernacular Architecture
Forum
Transportation Research
Board
Employment History
Dudek (2023-Present)
WSP/CA High-Speed Rail
Authority (2015-2023)
ICF International 2015-
2022)

2 Register of Historic Places (NRHP) for the purposes of the undertaking only and that a finding of no historic properties affected under 36 CFR § 800.4(d)(1) would be appropriate because the resource would be avoided and protected through measures implemented by the project. Mr. Kim authored the justification for the APE and the Section 106 preliminary effects analysis using the criteria of adverse effect (36 CFR § 800.5) (2023).

Section 106 Area of Potential Effects Justification for the Brightline West Vehicle Maintenance Facility at Sloan, NV.

Dudek was retained by the project proponent to prepare an area of potential effects (APE) boundary justification memorandum for the Brightline West High-Speed Rail Project’s vehicle maintenance facility at Sloan, NV. Because of the area’s relatively undeveloped desert landscape and the concern for potential visual impacts on historic properties, the APE was expanded to a one-mile radius around the project site. The APE delineation also considered potential project-related effects from vibratory, auditory, and atmospheric effects on historic properties. The lead federal agency for the undertaking is the Federal Railroad Administration, which approved the APE memorandum and transmitted it to the NV SHPO for concurrence. Mr. Kim was the author of the memorandum (2024).

Cultural Resources Inventory and Evaluation Report for the Huntington Library Scholar’s Grove Housing Project, San Marino, California. Dudek was retained by Greystar to prepare a cultural resources inventory and evaluation report for a project that involved the construction of 33 residential units, a central clubhouse with supportive recreational areas, and surface parking near the north entrance of the Huntington Library property in San Marino. The report also analyzed the project’s potential impacts under CEQA on five landscape features that contribute to the significance of the Huntington Library Historic District, which was listed in the NRHP in 1977. Mr. Kim was the lead built environment author and drafted the CEQA impacts analysis section of the report (2024).

On-Call Services for Department of Water Resources, Operations and Maintenance Division, State of California.

Dudek was retained by the State of California’s Department of Water Resources (DWR), Operations and Maintenance Division (O&M), to assist in a wide range of on-going environmental compliance efforts. Under this on-call contract, Mr.

Kim provides senior level guidance and reviews of the built environment evaluations and technical reports prepared under the current task orders (2023–Ongoing).

The Riverview Development Project, Santa Clarita, Los Angeles County, California. Dudek architectural historians conducted the fieldwork and authored a Built Environment Inventory and Evaluation Report (BEIER) for the Riverview Development Project. The project proposed to construct a mixed-use development consisting of 318 single-family units and 69,692 square feet of commercial space on a 35.4-acre site that was used for a rodeo and auto race track. The BEIER found that none of the extant buildings and structures within the study area were eligible for the NRHP, the California Register of Historical Resources (CRHR), or local designation in the city of Santa Clarita. The property was also evaluated in accordance with 14 Cal. Code of Regulations (CCR) § 15064.5(a)(2-3) using the criteria outlined in Public Resource Code (PRC) § 5024.1 and determined that none of the resources in the study area were historical resources for the purposes of CEQA. Mr. Kim provided quality assurance/quality control for this project. (2023).

Previous Project Experience
California High-Speed Rail Project Environmental Impact Report/Environmental Impact Statements. Mr. Kim served as a lead planner for the California High-Speed Rail Authority (CHSRA) and was responsible for reviewing the cultural resources, parks and recreation, and Section 4(f) EIR/EIS chapters for six of the eight regional sections of the California High-Speed Rail Project. Additionally, he reviewed the supporting cultural resources technical reports (inventory, evaluation, and finding of effect reports), built environment treatment plans, as well as contributed to the drafting of four memorandum of agreement documents between the CHSRA, California SHPO, and the Surface Transportation Board, provided technical guidance to the Authority’s regional consultants, and consulted with the SHPO to obtain Section 106 and Section 4(f) concurrences (2015-2022) DUDEK

1 Katie Ahmanson, MHC
HISTORIC PRESERVATION/SECTION 106 | BUILT ENVIRONMENT
Katie Ahmanson (KAY-tee AH-mun-son; she/her) is an architectural historian with 5 years’ experience in the field of architectural history and heritage conservation. She has experience with Historic -Cultural Monument nominations; citywide historic contexts; historical significance evaluations in consideration of the National Register of Historic Places (NRHP), California Register of Historical Resources (CRHR), and local designation criteria ; California Department of Parks and Recreation (DPR) 523 forms ; and Nevada Architectural Resource Assessment forms. Katie has worked with environmental compliance documentation in support of projects that fall under the California Environmental Quality Act (CEQA)/National Environmental Policy Act (NEPA), and Sections 106 and 110 of the National Historic Preservation Act (NHPA).

Relevant Project Experience
Development and Planning
Evolve Student Housing Project, San Diego State University, San Diego, California. The project involves the construction of new student housing, dining, and auxiliary uses to the university’s main campus. The project requires the demolition of 13 apartment buildings that are more than 45 years of age and is subject to CEQA and California PRC 5024 and 5024.5. The buildings required inventory and eva luation to determine if they were historical resources and if they should be placed on the State’s Master List. Served as the architectural historian Ms. Ahmanson coauthored the report, surveyed the property, wrote significance evaluations and building descriptions, and completed archival research. (2024–2025)
Carson Townhomes Built Project, City of Carson, California. Dudek was retained by the City of Carson to complete a Built Environment Inventory and Evaluation Report (BEIER) for the proposed Carson Townhomes Project, which proposed the demolition of three historic-era residences prior to the construction of 34, three-story townhome units. The purpose of the report is to determine if the project would impact any historical resources pursuant to CEQA. As an architectural historian, Katie wrote building descriptions and completed archival research for the report. (2024)
14125 Goldenwest Apartments BEIER, Orange County Housing and Community Development Department, Westminster, California. Dudek was retained by the Orange County Housing and Community Development Department to complete a BEIER for the 14125 Goldenwest Apartments Project, which proposed demolishing a commercial building for the construction of a 29-unit residential community for families experiencing homelessness. The purpose of the report is to determine if the project would impact any historical resources pursuant to CEQA and Section 106 of the NHPA. As an architectural historian, Katie coauthored the report, surveyed the properties, wrote significance evaluations and building descriptions, and completed archival research. (2024)

Education
University of Southern
California School of
Architecture
MA, Heritage
Conservation, 2022
Claremont McKenna
College
BA, Art History, 2019

2 15081 Jackson Street Built Environment Inventory and Evaluation Report, Orange County Department of Housing and Community Development, Midway City, Unincorporated Orange County, California. Dudek was retained by the Orange County Department of Housing and Community Development to complete BEIER for the 15081 Jackson Street Project, which proposed the development of new housing with funding from the Department of Housing and Urban Development. The purpose of the report is to determine if the project would impact any historical resources pursuant to CEQA and Section 106 of the NHPA. As an architectural historian, Katie coauthored the report, surveyed the properties, wrote significance evaluations and building descriptions, and completed archival research. (2024)
La Paz Village Senior Housing Project, City of Laguna Hills, Laguna Hills, California. Dudek was retained by the City of Laguna to complete a BEIER for the La Paz Village Senior Housing Project, which proposed to demolish the buildings on the project site for the construction of a five-story, 180-unit, senior housing building. The purpose of the report is to determine if the project would impact any historical resources pursuant to CEQA. As an architectural historian, Katie coauthored the report, surveyed the properties, wrote significance evaluations and building descriptions, and completed archival research. (2024) Altrudy II Senior Apartments Project, Orange County Housing and Community Development, Yorba Linda, California. The project involves the demolition of the existing residences on the project site and construction and operation of a 71-unit senior affordable housing community. The project is subject to Section 106 of the NHPA and NEPA. Dudek was retained by the Orange County Housing and Community Development Department to evaluate the resources and prepare a technical report to be used for consultation with the State Historic Preservation Officer (SHPO). As the senior architectural historian,, Katie coauthored the report, surveyed the property, wrote significance evaluations and building descriptions, and completed archival research. (2024) Tampico Motel Affordable Housing Project, City of Anaheim Department of Housing and Community Development, Anaheim, California. Dudek was retained by the City of Anaheim Department of Housing and Community Development to complete a BEIER for the proposed Tampico Motel Affordable Housing Project, which proposed the rehabilitation and conversion of the Tampico Motel to 30 units of affordable housing. The purpose of the report is to determine if the project would impact any historical resources pursuant to CEQA. As an architectural historian, Katie coauthored the report, surveyed the property, wrote building descriptions, and completed archival research. (2024)
South Bay Area Plan Project Historic Context Statement, County of Los Angeles Department of Regional Planning, Unincorporated Los Angeles County, California. Dudek was retained by the County of Los Angeles Department of Regional Planning to prepare a Historic Context Statement (HCS) for the South Bay Area Plan (SBAP) Project. The HCS is one component of the larger SBAP project that addresses the following seven unincorporated communities of the County: Alondra Park/El Camino Village, Del Aire/Wiseburn, Hawthorne Island, La Rambla, Lennox, West Carson, and Westfield/Academy Hills (SBAP communities). Collectively, these SBAP communities reside within the South Bay Planning Area, which is one of the 11 Planning Areas identified in the County General Plan. The purpose of the HCS is to inform and enhance the larger SBAP Project as it relates to historical resources within the SBAP communities, including the preparation of goals, policies, and implementation programs. As an architectural historian, Katie surveyed the area and completed archival research for the report. (2023) DUDEK

1 Roshanne S. Bakhtiary, MA

ARCHAEOLOGIST
Roshanne Bakhtiary (she/her) is an archaeologist with 13 years’ professional experience in cultural resources management, archaeological research, and regulatory compliance in California and the Great Basin. She also has extensive knowledge in hunter-gatherer archaeology, Mission period archaeology, and California prehistory and ethnography. Previously, Roshanne has held positions as an archaeologist, osteologist, cultural training lead, project manager, and principal investigator for various projects throughout California. In these roles, she has co-authored technical reports, led fieldwork operations, produced geographic information system (GIS) based analyses, facilitated Native American coordination and outreach, conducted records searches, managed National Environmental Policy Act (NEPA) and California Environmental Quality Act (CEQA) compliance projects, and evaluated archaeological resources for the National Register of Historic Places under Section 106 of the National Historic Preservation Act (NHPA) and the California Register of Historical Resources (CRHR) under CEQA. She also excels in communicating and consulting with various private sector clients and public agencies, negotiating budgets for projects, implementing technology-based fieldwork solutions, managing laboratory operations, conducting artifact analysis, and preparing archaeological collections for curation.

Previous Project Experience
Professional
Los Angeles Area River Improvements Project, City of Cudahy, Los Angeles County, California. Ms. Bakhtiary served as a principal cultural resources investigator for a City of Cudahy parks and recreation project that required compliance under the United States Army Corps of Engineers (USACE) guidelines and Section 106 of the NHPA.

She coordinated the records search, NAHC outreach efforts, cultural resources pedestrian survey, the preparation of the technical report, and provided management and compliance recommendations relating to cultural resources. Considerations included compliance under CEQA and Section 106 of the NHPA. (2025-present) Prairie Song Reliability Project, Private Developer, Acton, California. As principal archaeological investigator, Ms.

Bakhtiary coordinated the records search, NAHC outreach efforts, archaeological surveys, the preparation of a technical report, and provided management and compliance recommendations relating to archaeological resources for a battery energy storage project located in unincorporated Los Angeles County, California. As part of this effort, she evaluated 11 historic-era archaeological resources for inclusion in the NRHP and CRHR.

Considerations included compliance under CEQA and the Assembly Bill (AB) 205. (2024-present) Twenty-Three Los Angeles County Parks Project, County of Los Angeles, Los Angeles County, California. As principal archaeological investigator, Ms. Bakhtiary coordinated the records searches, the preparation of the archaeological resources constraints analyses, and provided management and compliance recommendations relating to archaeological resources for 23 Los Angeles County public parks located in Los Angeles County, California. Considerations included compliance under CEQA. (2024-present) Port of Los Angeles Electrification Project, Los Angeles Department of Water and Power, Los Angeles, California.

As principal archaeological investigator, Ms. Bakhtiary coordinated the records search, archaeological resources Education
University of California,
Davis, PhD, Evolutionary
Anthropology, In Progress
MA, Evolutionary
Anthropology, 2016
California Polytechnic
State University,
San Luis Obispo, BS,
Anthropology and
Geography, 2013

2 pedestrian survey, the preparation of a technical report, and provided management and compliance recommendations relating to archaeological resources for a utilities infrastructure project located in the City of Los Angeles, California. (2024-present)
State Water Project, California Department of Water Resources, Los Angeles and Riverside Counties, California.

Ms. Bakhtiary served as the cultural lead on the South Central Coastal Information Center and Eastern Information Center records search collation and digitization efforts in support of the California Department of Water Resources (DWR) State Water Project (SWP). She led a team of archaeologists and GIS analysts through a series of data entry and digitization tasks that aided in the development of a state-wide buried site sensitivity model to assist DWR in their cultural resources management strategies in support of the SWP. (2024-present) Cal Poly Pomona Master Plan Update Project, Cal Poly Pomona, Pomona, California. As principal archaeological investigator, Ms. Bakhtiary coordinated the records search, NAHC outreach efforts, archaeological survey, the preparation of a technical report, and provided management and compliance recommendations relating to archaeological resources for a master plan update located in Pomona, California. She also assisted in and the Native American consultation efforts pursuant to AB 52 and the preparation of the Cultural and TCR CEQA document sections. Considerations included compliance under CEQA. (2024-2025) Adelanto-Rinaldi Line 1 Upgrade Project, Los Angeles Department of Water and Power, Los Angeles County, California. As principal cultural resources investigator, Ms. Bakhtiary coordinated the records search, NAHC outreach efforts, archaeological survey, the preparation of a technical report, and provided management and compliance recommendations relating to archaeological resources for a utilities infrastructure upgrade project located in Los Angeles County, California. She also assisted in the preparation of the Cultural and TCR CEQA document sections for the project. Considerations included compliance under CEQA. (2024) The Huntington Library Scholar’s Grove Housing Project, The Huntington Library, San Marino, California. As principal investigator, Ms. Bakhtiary coordinated the records search, cultural resources pedestrian survey, the preparation of a technical report, and provided management and compliance recommendations relating to archaeological and built environment resources for the Scholar’s Grove Housing Project. As part of this effort, she evaluated five historic-era built environment resources for inclusion in the NRHP and CRHR. Considerations included compliance under CEQA and the City of San Marino’s rules and regulations outlined for the Huntington Library. (2024)
U.S. Department of Housing and Urban Development Projects, Couty of Orange, Orange County, California. Ms.

Bakhtiary served as a principal archaeological investigator for 7 County of Orange U.S. Department of Housing and Urban Development projects throughout Orange County. She coordinated the records searches, the preparation of technical reports, managed California State Historic Preservation Officer concurrence and communication efforts and provided management and compliance recommendations relating to archaeological resources. Considerations included compliance under CEQA and Section 106 of the NHPA. (2023-present) On-Call Program, Southern California Edison, Los Angeles, California. Served as a cultural lead for Southern California Edison’s (SCE’s) Non-Master Special Use Permit (MSUP) Public Lands infrastructure replacement projects throughout Southern California including on lands administered by the Bureau of Land Management (BLM), California Department of Parks and Recreation, Bureau of Indian Affairs, Bureau of Reclamation (BOR), California Department of Water Resources, U.S. Army Corps of Engineers (USACE), California Department of Fish and Wildlife, and National Parks Service. Was responsible for completing archaeological desktop reviews, coordinating with public agencies, applying for permits, conducting site surveys, documenting newly recorded cultural materials, and authoring Section 106-compliant technical reports. (2022–2023)

DUDEK

1 Ryan J. Glenn, MA, RPA
HISTORIC PRESERVATION/SECTION 106: ARCHAEOLOGY
Ryan J. Glenn (RY-an GLEN; He, him) is a senior archaeologist with 17 years’ experience in cultural resource management, specializing in human osteology, zooarchaeology, faunal analysis, and coastal ecology. Over the course of his career, Ryan has served as a project manager in the public and private sectors for clients such as the Southern California Gas Company, Southern California Edison (SCE), Pacific Gas & Electric, San Diego Gas and Electric, the U.S. Navy, the U.S. Marine Corps, the U.S. Airforce, the California Department of Transportation (Caltrans), and AT&T. He currently functions as a senior archaeologist in project oversight, including proposals, research designs, fieldwork, artifact analysis, and report authorship.

Ryan’s experience is both academic and professional, spanning California, Nevada, Washington, Texas, Kansas, and Oklahoma and including work for the Naval Facilities Engineering Command Southwest, Caltrans, Western Area Power Administration, Bureau of Land Management, U.S. Army Corps of Engineers, U.S.

Fish and Wildlife Service, California State Parks, various city and county agencies, and directly for Native American groups.

Ryan has supervised numerous large-scale surveys, test excavations, data recovery programs, and geoarchaeological investigations. He has authored research designs, management and treatment plans, proposals, preliminary and final reports, and technical analyses. Ryan has integrated his personal research interests into projects and participated in professional symposia at local venues, including the Society for California Archaeology and California Islands Symposium. Additionally, he has conducted academic research in Northern England, United Kingdom. Ryan’s current focus is on coastal archaeology and the relationship of humans and early canines, Ryan currently assists in the preparation of technical reports and analyses for environmental impact statements at the state and federal levels for Dudek projects. He also has experience in archaeological theory, method, recordation, collection, handling, analysis, evaluation, and reporting, including planning, equipping, staffing, organizing, and supervising extensive archaeological projects.

Relevant Project Experience
In-House Consultant, Confidential Client, Multiple Locations, California. Conducted cultural resources record searches, High-level Reviews, Distributed Energy Resources sections and checklists, reports, consultant management, project and agency coordination, and field surveys for the Operations and Maintenance (O&M), Pipeline Safety Enhancement Plan, and Major Projects. Conducted cultural reviews for over 100 projects across Southern and central California. Also managed projects as the Environmental Lead and managed environmental clearance for construction endeavors for multiple environmental disciplines. (2021–2024)

Education
University of Southern
California
BA, Anthropology, 2006
California State University,
Los Angeles
MA, Archaeology, 2011
Certifications
Registered Professional
Archaeologist (RPA),
CA No. 28576432
Permits
Bureau of Land
Management, Cultural
Resource Use Permit
▪ Principal
Professional Affiliations
Society for California
Archaeology
Society for American
Archaeology
Association of
Environmental
Professionals
International Council for
Archaeozoology

2 City of San Fernando Housing Element Update and General Plan, City of San Fernando, California. Rincon was retained by the City of San Fernando to update the Housing Element of the City’s General Plan. Conducted the Assembly Bill (AB) 52 consultation between the City (Lead Agency) and Native American Tribes. Authored the AB 52 letter package, coordinated meetings between Tribal spokespeople and City officials, and finalized appropriate mitigation measures agreed on by all parties. Served as cultural resources project manager. (2021) Deteriorated Pole Replacement Projects Under Special Use Permit, Confidential Client, Multiple Counties, California. Under an on-call contract, SWCA provided environmental compliance and management support for thousands of O&M projects across the Client’s transmission and distribution systems and generation facilities in Los Angeles, Kern, San Bernardino, Riverside, Ventura, Orange, Mono, Inyo, and Tulare Counties. The projects were conducted under the Special Use Permits obtained by SCE to conduct Deteriorated Pole Replacements and other O&M activities located within the Region 5 National Forests, including Angeles National Forest, Inyo National Forest, Cleveland National Forest, Los Padres National Forest, Sierra National Forest, Sequoia National Forest, and San Bernardino National Forest. Conducted environmental reviews and coordinated with agencies and subconsultants to complete replacement transmission poles within sensitive areas of the national forests. Served as project coordinator. (2019–2020)
Archaeological Assessment for Santa Monica High School, City of Santa Monica, California. Chambers in conjunction with Leighton Consulting Inc. were retained to provide a complete Phase I and Phase II archaeological assessment of the North Campus construction area to determine the potential for buried sites in the vicinity of the History Building on the Santa Monica High School campus. Chambers provided literature and records search, survey and excavation, and California Environmental Quality Act (CEQA) compliant reporting. The excavations included four test units and multiple shovel test pits. Served as project manager. (2018) Historic Assessment of the Star Theater, 145 North 1st Street, City of La Puente, California. Chambers was contracted by the City of La Puente to complete a historic assessment report for the Star Theater to assess the potential impacts to the building associated with development of a proposed 22-unit condominium project at the property. Chambers conducted the survey and evaluation of the property to determine if it meets the criteria as a significant historical resource as defined by CEQA and the California Register of Historic Resources (CRHR). The analysis complied with state environmental regulations concerning the protection of historical architectural resources. Served as archaeologist and co-author. (2017) Camden Hollywood Project, Bernard’s Construction, Los Angeles, California. Chambers was retained by commercial builder Bernard’s Construction to perform cultural and paleontological resource monitoring during sub excavation for a mixed-use, 287-unit urban infill project that included retail space for Houston based Camden Property Trust. Chambers tasks included literature and records search, personnel education, monitoring and final CEQA report submission. Served as field director of archaeology and paleontology. (2016) Long Beach Polytechnic High School Auditorium Seismic Retrofit and Historic Restoration Project, Long Beach Unified School District, Long Beach, California. Chambers was retained by Long Beach Unified School District to perform architectural evaluation of the historic auditorium and document and monitor the restoration process to ensure no diagnostic components were impacted or effected. Chamber’s tasks included weekly monitoring visits to document the progress and compose weekly reports, which were compiled into a final evaluation report that was submitted to the district. Served as field director. (2016) DUDEK
Cultural Resources Assessment November 4, 2025
Appendix B: CONFIDENTIAL SCCIC Records Search Results
Cultural Resources Assessment October 31, 2025
Appendix C: Sacred Lands File Search
Sacred Lands File & Native American Contacts List Request Native American Heritage Commission
1550 Harbor Blvd, Suite 100
West Sacramento, CA 95691
916-373-3710
916-373-5471 – Fax
[email protected]
Information Below is Required for a Sacred Lands File Search Project: ______________________________________________________________________ County:______________________________________________________________________ USGS Quadrangle Name:_______________________________________________________ Township:__________ Range:__________ Section(s):__________ Company/Firm/Agency:_________________________________________________________ Street Address:________________________________________________________________ City:______________________________________________ Zip:______________________ Phone:_____________________________________________
Fax:_______________________________________________
Email:_____________________________________________
Project Description:

Eaton Wash Stormwater Capture Project
Los Angeles
Mount Wilson
1N
12W
25 Dudek
225 South Lake Avenue, Suite M210
Pasadena
91101
(626) 204-9840
[email protected]
The project would be implemented by the City to improve water quality and effectively manage stormwater runoff. The project entails constructing public infrastructure to divert dry weather and stormwater flows from the Eaton Wash channel and send the water for treatment through a series of vegetated treatment ponds and a subsurface storage reservoir.

Project Boundary
1 Mile Search Radius
1:24,000
0 600300
Meters
0 2,0001,000
Feet
n
Date: 3/31/2025 User: nreid Path: Z:\Projects\j1653700\MAPDOC\Cultural\Eaton Wash Stormwater Cultural\Eaton Wash Stormwater Cultural.aprx Map: Records Search Layout: Records Search Mount Wilson Quadrangle - Township 1N Range 12W Section 25 SOURCE: USGS 7.5-Minute Series
Eaton Wash Stormwater Capture
Records Search
DUDEK

STATE OF CALIFORNIA Gavin Newsom, Governor

NATIVE AMERICAN HERITAGE COMMISSION

May 7, 2025

Ryan Glenn
Dudek

Via Email to: [email protected]

Re: Eaton Wash Stormwater Capture Project, Los Angeles County

To Whom It May Concern:

As requested, a record search of the Native American Heritage Commission (NAHC) Sacred Lands File (SLF) was completed based on information submitted for the above referenced project. The results were positive. Please contact the Gabrieleno Band of Mission Indians / Kizh Nation on the attached list for more information. Please note that tribes do not always record their sacred sites in the SLF, nor are they required to do so. As such, a SLF search is not a substitute for consultation with all tribes that are traditionally and culturally affiliated with a project’s geographic area.

Attached is a list of Native American tribes who may also have knowledge of cultural resources in the project area. This list should provide a starting place in locating areas of potential adverse impact within the proposed project area. Please contact all of those listed; if they cannot supply information, they may recommend others with specific knowledge. If within two weeks of notification, a response has not been received, the Commission requests that you follow-up with a telephone call or email to ensure that the project information was received.

If you receive notification of a change of address or phone number from a tribe, please notify the NAHC so that we can assure that our lists contain current information.

In addition to engaging in tribal consultation, you should consult the appropriate regional California Historical Research Information System (CHRIS) archaeological Information Center to determine whether it has information regarding the presence of recorded archaeological sites within the project area.

If you have any questions or need additional information, please contact me at my email address: [email protected].

Sincerely,

Pricilla Torres-Fuentes
Cultural Resources Analyst

Attachment

CHAIRPERSON
Reginald Pagaling
Chumash

VICE-CHAIRPERSON
Buffy McQuillen
Yokayo Pomo, Yuki,
Nomlaki

SECRETARY
Sara Dutschke
Miwok

PARLIAMENTARIAN
Wayne Nelson
Luiseño

COMMISSIONER
Isaac Bojorquez
Ohlone-Costanoan

COMMISSIONER
Stanley Rodriguez
Kumeyaay

COMMISSIONER
Reid Milanovich
Cahuilla

COMMISSIONER
Bennae Calac
Pauma-Yuima Band of
Luiseño Indians

COMMISSIONER
Vacant

ACTING EXECUTIVE

SECRETARY

STEVEN QUINN

NAHC HEADQUARTERS
1550 Harbor Boulevard
Suite 100
West Sacramento,
California 95691
(916) 373-3710
[email protected]
NAHC.ca.gov

Native American Heritage Commission
Native American Contact List
Los Angeles County
5/7/2025

Tribe Name F/N Contact
Person
Contact
Address
Phone Email Address Cultural
Affiliation
Counties
Cahuilla Band of
Indians
F BobbyRay
Esparza,
Cultural
Director
52701 CA
Highway
371
Anza, CA,
92539
(951) 763-
5549
[email protected] Cahuilla Imperial, Los Angeles, Orange, Riverside, San Bernardino, San
Diego
Cahuilla Band of
Indians
F Erica
Schenk,
Chairperson
52701 CA
Highway
371
Anza, CA,
92539
(951) 590-
0942
[email protected] Cahuilla Imperial, Los Angeles, Orange, Riverside, San Bernardino, San
Diego
Cahuilla Band of
Indians
F Anthony
Madrigal,
Tribal
Historic
Preservation
Officer
52701 CA
Highway
371
Anza, CA,
92539
(951) 763-
5549
[email protected] Cahuilla Imperial, Los Angeles, Orange, Riverside, San Bernardino, San
Diego
Gabrieleno Band of
Mission Indians -
Kizh Nation
N Christina
Swindall
Martinez,
Secretary
P.O. Box
393
Covina,
CA, 91723
(844) 390-
0787
[email protected] Gabrieleno Los Angeles, Orange, Riverside, San Bernardino,
Santa Barbara, Ventura
Gabrieleno Band of
Mission Indians -
Kizh Nation
N Andrew
Salas,
Chairperson
P.O. Box
393
Covina,
CA, 91723
(844) 390-
0787
[email protected] Gabrieleno Los Angeles, Orange, Riverside, San Bernardino,
Santa Barbara, Ventura
Gabrieleno/Tongva
San Gabriel Band
of Mission Indians
N Anthony
Morales,
Chairperson
P.O. Box
693
San
Gabriel,
CA, 91778
(626) 483-
3564
[email protected] Gabrieleno Los Angeles, Orange, Riverside, San Bernardino,
Santa Barbara, Ventura
Tribe Name F/N Contact
Person
Contact
Address
Phone Email Address Cultural
Affiliation
Counties
Gabrielino Tongva
Indians of California
Tribal Council
N Christina
Conley,
Cultural
Resource
Administrator
P.O. Box
941078
Simi
Valley, CA,
93094
(626) 407-
8761
[email protected] Gabrielino Los Angeles, Orange, Riverside, San Bernardino,
Santa Barbara, Ventura
Gabrielino Tongva
Indians of California
Tribal Council
N Robert
Dorame,
Chairperson
P.O. Box
490
Bellflower,
CA, 90707
(562) 761-
6417
[email protected] Gabrielino Los Angeles, Orange,
Riverside, San Bernardino,
Santa Barbara, Ventura
Gabrielino/Tongva
Nation
N Sandonne
Goad,
Chairperson
106 1/2
Judge John
Aiso St.,
#231
Los
Angeles,
CA, 90012
(951) 807-
0479
[email protected] Gabrielino Los Angeles, Orange, Riverside, San Bernardino,
Santa Barbara, Ventura
Gabrielino-Tongva
Tribe
N Charles
Alvarez,
Chairperson
23454
Vanowen
Street
West Hills,
CA, 91307
(310) 403-
6048
[email protected] Gabrielino Los Angeles, Orange, Riverside, San Bernardino,
Santa Barbara, Ventura
Gabrielino-Tongva
Tribe
N Sam Dunlap,
Cultural
Resource
Director
P.O. Box
3919
Seal
Beach, CA,
90740
(909) 262-
9351
[email protected] Gabrielino Los Angeles, Orange,
Riverside, San Bernardino,
Santa Barbara, Ventura
Santa Rosa Band
of Cahuilla Indians
F Steven
Estrada,
Tribal
Chairman
P.O. Box
391820
Anza, CA,
92539
(951) 659-
2700
[email protected] Cahuilla Imperial, Los Angeles, Orange, Riverside, San Bernardino, San
Diego
Santa Rosa Band
of Cahuilla Indians
F Vanessa
Minott, Tribal
Administrator
P.O. Box
391820
Anza, CA,
92539
(951) 659-
2700
[email protected] Cahuilla Imperial, Los Angeles, Orange, Riverside, San Bernardino, San
Diego
Soboba Band of
Luiseno Indians
F Joseph
Ontiveros,
Tribal
P.O. Box
487
San
(951) 663-
5279
[email protected] Cahuilla
Luiseno
Imperial, Los Angeles, Orange,
Riverside, San Bernardino, San
Diego
Tribe Name F/N Contact
Person
Contact
Address
Phone Email Address Cultural
Affiliation
Counties
Historic
Preservation
Officer
Jacinto,
CA, 92581
Soboba Band of
Luiseno Indians
F Jessica
Valdez,
Cultural
Resource
Specialist
P.O. Box
487
San
Jacinto,
CA, 92581
(951) 663-
6261
[email protected] Cahuilla
Luiseno
Imperial, Los Angeles, Orange,
Riverside, San Bernardino, San
Diego

This list is current only as of the date of this document. Distribution of this list does not relieve any person of statutory responsibility as defined in Section 7050.5 of the Health and Safety Code, Section 5097.94 of the Public Resources Code and Section 5097.98 of the Public Resources Code.

This list is only applicable for contacting local Native Americans with regard to cultural resources assessment for the proposed Eaton Wash Stormwater Capture Project, Los Angeles County.

Cultural Resources Assessment October 31, 2025
Appendix D: DPR 523 Forms

*P11. Report Citation: Dudek. 2025. Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project. Prepared for the City of Pasadena.
*Attachments: ☐ NONE ☒Location Map ☒Continuation Sheet ☒Building, Structure, and Object Record ☐Archaeological Record ☐District Record ☐Linear Feature Record ☐Milling Station Record ☐Rock Art Record ☐Artifact Record ☐Photograph Record ☐Sketch Map ☐Other (List):

DPR 523A *Required Information
State of California - The Resources Agency Primary # DEPARTMENT OF PARKS AND RECREATION HRI #
PRIMARY RECORD Trinomial
NRHP Status Code 6Z
Other Listings
Review Code Reviewer Date
P1. Other Identifier: Map ID 1
*P2. Location: ☐ Not for Publication ☒ Unrestricted *a. County Los Angeles and (P2c, P2e, and P2b or P2d. Attach a Location Map as necessary.) *b. USGS 7.5' Quad Pasadena, Calif. Date 1999 T 12W; R; ¼ of ¼ of Sec 38; San Bernardino B.M. c. Address N/A City Pasadena Zip 91107
d. UTM: (Give more than one for large and/or linear resources) Zone 11, 399895 mE/ 3778400 mN e. Other Locational Data: (e.g., parcel #, directions to resource, elevation, decimal degrees, etc., as appropriate)

34.14169804048712, -118.08578204648151

*P3a. Description: (Describe resource and its major elements. Include design, materials, condition, alterations, size, setting, and boundaries)
The Eaton Wash Channel is a stormwater channel in Pasadena, California spanning approximately 8-miles south from the San Gabriel Mountains to the Rio Hondo River In South El Monte. It is completely paved with concrete and has a width of about 30- feet with a depth of about 10-feet (Photograph 1). The channel body includes a low-flow channel along the western boundary that carries a regular streamflow and a bank for excess water. Chain-link fencing lines the top of the channel walls along its west and east boundaries of the wash. The intensive survey recorded a segment of the alignment that measured approximately 145-feet in length (Photograph 2).

*P3b. Resource Attributes: HP11. Engineering Structure *P4. Resources Present: ☐ Building ☒ Structure ☐ Object ☐ Site ☐ District ☐ Element of District ☐ Other P5b. Description of Photo: Photo 1,
IMG_1114, looking north,
6/26/2025.

*P6. Date Constructed/Age and
Sources:  Historic
c. 1943 (PP 1943: 5)

*P7. Owner and Address:

Los Angeles County Flood Control
Department
900 S. Fremont Avenue
Alhambra, California 91803

*P8. Recorded by:

Katie Ahmanson, MHC
Dudek
225 S. Lake Ave, Ste. M210
Pasadena, CA 91101

*P9. Date Recorded:

June 26, 2025

*P10. Survey Type: Intensive
P5a. Photograph 1

*Resource Name or # Eaton Wash Channel

DPR 523B *Required Information
State of California - The Resources Agency Primary # DEPARTMENT OF PARKS AND RECREATION HRI#

BUILDING, STRUCTURE, AND OBJECT RECORD
B1. Historic Name: Eaton Wash
B2. Common Name: Eaton Wash Channel
B3. Original Use: Stormwater channel
B4. Present Use: Stormwater channel
*B5. Architectural Style: N/A
*B6. Construction History: (Construction date, alterations, and date of alterations) Known alterations to the wash include repairs in 1952 and 1954, and concrete paving between 1953 and 1964 (PI 1952: 4; PI 1954: 31; NETR 2025a). *B7. Moved? ☒No ☐ Yes ☐ Unknown Date: Original Location:
*B8. Related Features: None
B9a. Architect: Unknown b. Builder: Unknown *B10. Significance: Theme N/A Area: N/A Period of Significance N/A Property Type N/A Applicable Criteria N/A (Discuss importance in terms of historical or architectural context as defined by theme, period, and geographic scope. Also address integrity.)

The Eaton Wash Channel does not meet the criteria for listing in the National Register of Historic Places (NRHP), California Register of Historical Resources (CRHR), or the City of Pasadena Historic Resources Database. The property was evaluated in accordance with Section 106 of the National Historic Preservation Act (Section 106) and Section 15064.5 (a)(2)-(3) of the CEQA Guidelines using the criteria outlined in Section 5024.1 of the California Public Resources Code. The property is not considered a historic property for the purposes of Section 106 or a historical resource under CEQA. As such, this evaluation assigns a 6Z California Historical Resources Status Code to the Eaton Wash Channel. See Continuation Sheet.

B11. Additional Resource Attributes: None

*B12. References: See Continuation Sheet

B13. Remarks: None

*B14. Evaluator: Katie Ahmanson, MHC, Dudek

*Date of Evaluation: September 5, 2025

(This space reserved for official comments.)

(Sketch Map with north arrow required.)

0 20 40
'-==------I Meters

*Map Name: Pasadena, Calif. *Scale: 1:24,000 *Date of map: 1999 DPR 523J * Required information
State of California - The Resources Agency Primary #
DEPARTMENT OF PARKS AND RECREATION HRI#
LOCATION MAP Trinomial

0 260 520
--~=-~=== Meters

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

DPR 523L * Required information
State of California - The Resources Agency Primary#
DEPARTMENT OF PARKS AND RECREATION HRI #
CONTINUATION SHEET Trinomial
*B10. Significance (continued from page 2):

The following historic context is adapted from Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project, prepared in October 2025 by Dudek.

Historical Overview of the City of Pasadena
The City of Pasadena was established in 1886 when it was incorporated into Los Angeles County. Initially, the area was inhabited by the Hahamogna people, who dominated the area until the arrival of the Spanish. During the Spanish period in the 1770s, the area was part of the lands under the jurisdiction of the San Gabriel MissionMembers of the local tribes were forced to build the mission structure and work on the ranch to cultivate crops. After Mexico won its independence from Spain in 1822, Alta California bec ame part of the Mexican Republic, and the Mexican government opened California to foreign trade. The area comprising present-day Pasadena became part of Rancho el Rincon de San Pascual in 1926, before it was acquired by Jose Perez and Enrique Sepulveda in the 1840s. Perez and Sepulveda subdivided a portion of the land for the development of the several single-family residences, and in 1843 Manual Garfias purchased part of the rancho in 1843 to construct a hacienda. By 1848, the United States had assumed formal control of California with the Treaty of Guadalupe-Hidalgo and introduced Anglo culture and society. Garfias continued to own the ranch until the 1860s, when he sold the property to Dr. John S. Griffin and Benjamin Davis Wilson who subdivided the land and sold off portions. Development in Pasadena continued during the 1860s, and by 1873, Griffin and Wilson divided and developed the last four separate tracts of their land (HRG 2025: 31; O’Connor 1993: 7-10).

The City of Pasadena was incorporated in 1886 during a period of agricultural growth. The fertile soil in the area lent itself to a successful local citrus industry that encouraged settlers to move to the area. Additionally, the completion of the transcontinental railroad in 1869 aided in the growth of the area as well as the transportation of local produce. The citrus industry continued to dominate the City’s economy throughout the early twentieth century, followed by the cultivation of wheat and barley. Development of early homes reflected the City’s humble beginnings with simple one and two-story wood-frame vernacular farmhouses that were later replaced with more substantial masonry buildings.

Infrastructure such as sewers, paved streets, and electrical s treet lighting were installed during 1880s and 1890s (O’Connor 1993: 12-19; City of Pasadena 2025).

By the turn of the century, Pasadena’s economy began to shift to a tourist-based economy due to its picturesque location in the foothills of the San Gabriel Mountains. Early hotels were modest in scale and primarily promoted to tuberculosis patients who traveled to the area to benefit from its temperate climate , known to have a positive effect on health.

Pasadena’s prominence as a tourist destination began when the Pasadena Board of Trade formed in 1888 and began to “promote and encourage everything that wi ll make our beloved city more beautiful, more healthful morally and physically” (O’Connor 1993: 17). The board published Pasadena: Crown of the Valley in 1892 to promote the many recreational opportunities to tourists and residents in hopes of stimulating tourism. The San Gabirel Mountains offered visitors various recreational activities including picnicking, horseback riding, hiking, hunting, and fishing. Developed of grand hotels such as the Hotel Green, in 1894, the Raymond Hotel in 1901, and the Hotel Maryland in 1903, led to a wave of tourists enamored by the local climate and amenities (O’Connor 1993: 17-20).

During the 1910s and 1920s, tourists began to purchase land and construct vacation homes for their winter stays.

Mansions replaced many of the early modest residences associated with the agricultural industry, and the street Orange Grove, named after its vicinity to local citrus orchards, became known as “Millionaires’ Row”. As Pasadena developed into a modern city, it enticed middle and working-class residents who supported the construction industry with laborers, brick makers, and hospitality workers at t he hotels. Residential development patterns at this time reflected socio - economic and racial boundaries. The southwest portion of the city consisted of wealthy, primarily white residents, while middle-class residents occupied the areas north and east of the city center (O’Connor 1993: 20-21).

The Great Depression (1929–1939) impacted industries and communities throughout the city, especially working-class jobs such as domestic workers and retail clerks. Although the population of Pasadena reached 76,000 residents by 1930, the city’s industrial base decreased from 191 companies in 1920 to 150 companies in 1930. Many of the large hotels that struggled at this time resulted in the demolition of some, like the Hotel Maryland in 1935, and the conversion of others for different uses (O’Connor 1993: 21-22). Additionally, many of the mansions along Millionaires’ Row were

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

DPR 523L * Required information
State of California - The Resources Agency Primary#
DEPARTMENT OF PARKS AND RECREATION HRI #
CONTINUATION SHEET Trinomial
abandoned or converted into boarding houses, leading to the area being rezoned for multi-family development in 1948.

Wartime employment during the onset of World War II in 1941 saw a small increase in the population as servicemen passed through Los Angeles on their way to and from the war. However, development largely slowed during the beginning of the war (O’Connor 1993: 33).

After World War II, a massive wave of migration and building boom occurred throughout California. Pasadena experienced a population increase of over 22,000 residents between 1940 and 1950 with new residential tracts developed in the Allendale, Upper Hastings, Kinneloa, San Rafael, and Linda Vista neighborhoods of the city. With the advent of the state and federal highway systems during the 1950s and 1960s, automobiles allowed travelers to take themselves to places that were only previously accessible by railroads. The highway system encouraged tourism that propelled the city’s economy and spurred growth in the surrounding areas. This growth is reflected in the city’s present- day built environment that includes residential development along public transportat ion lines and commercial development along major commercial routes. Residential partitioning enforced zoning ordinances with specific building standards and lot controls characterized by concentrations of single-family residences with distinctive planning features such as street alignments, setbacks, curbs, sidewalks, and landscaping (O’Connor 1993: 33 -43). Historical aerial photographs show that Pasadena was primarily developed by the 1980s (NETR 2025a). In recent years, the economy has shifted to support a variety of industries including health care and social assistance, professional, scientific, and technical services, and educational services. As of 2023, the population in Pasadena included over 136,000 residents (Data USA 2025).

Development of the Eaton Wash Channel
The Eaton Wash Channel is a stormwater channel in Pasadena, California, that drains into the Rio Hondo River and then into the Los Angeles River. The wash lies along the foothills of the San Gabriel Mountains and collects water from the steep ridges of the surrounding Eaton Canyon. Historically, the wash was a natural creek that provided water to the area since before Spanish settlement and flowed into the San Gabriel River. Native American villages were located along the creek, and subsequent European and American settlers used it for drinking water. Initially, the surrounding canyon was called “El Precipicio” by the Spanish because of its steep cliffs, but it was later named Eaton Canyon after the first American rancher to use the creek for irrigation, Judge Benjamin Eaton. In 1865, Eaton built the Fair Oaks Ranch House along Eaton Creek and used the water to grow grapes on the cliffs of the canyon. As more people continued to settle in the canyon, the need for water began to grow. By 1887, the Precipice Canyon Water Company was established to mine Eaton Canyon for water. The company mined a total of fifty tunnels that allowed access to underground water that was used for drinking water and to irrigate the area (ECNCA 2025; HRG 2025: 10, 34).

From its earliest years as a predominantly agrarian community, Eaton Canyon experienced intense flooding that destroyed crops and property. By 1894, the Los Angeles County Board of Supervisors proposed the development of the wash to drain stormwater through the canyon (PDES 1894: 3). The Eaton Wash is visible in historic topographic maps from 1894 (NETR 2025b). Heavy rains in 1914 led to a need for repairs to the wash (PS 1914: 9). As a result, the County Board of Supervisors proposed the formation of the Eaton Canyon Wash Protection District to develop drainage ditches in the canyon to carry stormwater into the Eaton Wash in 1914 (PS 1915: 6). This allowed the surrounding canyon area to be subdivided and developed with residential properties during the late 1910s followed by the development of infrastructure such as bridges and roadways across the wash during the 1920s (PS 1911: 14; PSN 1925a: 10; PSN 1925b: 1).

However, heavy rains and increased development led to greater loss of property as flooding continued. The Eaton Wash Association was organized in 1938 to find a solution to the flood control problem. The association sought to obtain Federal aid to channelize the wash and divert flood water (PSN 1938: 13). In 1939, the Los Angeles County Flood Control Department included the development of the Eaton Wash diversion channel in the United States District Engineer’s comprehensive flood control plan for Los Angeles County (PSN 1939: 10). The bill was approved in 1940, and plans were approved by the United State Army Engineers in 1943 with $3,462,000 allocated to flood control improvements throughout Pasadena and Altadena (PSN 1940: 13; PP 1943: 5). Improvements and repairs were made to the wash in 1952 and 1954 after torrential storms (PI 1952: 4; PI 1954: 31). Historic aerial photographs indicate that the Eaton Wash Channel has remained in the same alignment and has been relatively unchanged since 1952. The wash was channelized with concrete between 1953 and 1964 (NETR 2025a).

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

DPR 523L * Required information
State of California - The Resources Agency Primary#
DEPARTMENT OF PARKS AND RECREATION HRI #
CONTINUATION SHEET Trinomial
Statement of Significance
NRHP/CRHR Criteria
The Eaton Wash Channel was evaluated in consideration of the NRHP and CRHR criteria and integrity requirements. As a result of the evaluation, the Eaton Wash Channel is recommended not eligible for inclusion in the NRHP or CRHR due to a lack of significant associations.

Criterion A/1: Events
Under NRHP Criterion A and CRHR Criterion 1, the segment of the Eaton Wash Channel lacks a direct and important association with any event significant in local, state, or national history. The Eaton Wash Channel was initially developed as an unpaved wash c. 1894 to drain stormwater in the surrounding canyon. During the late 1910s, the area was subdivided and developed with single-family residences. However, as development increased, so did flooding, leading to increased reports of property damage. To quell the flooding, the wash was channelized with concrete between 1953 and 1964 and has likely been repaved to allow for its continuous use. Although the Eaton Wash Channel contributed to the overall development of the Eaton Canyon, its contribution to this growth was a consequence of the residential expansion in the area, rather than the initial impetus for development. Lacking sufficient associative significance, the Eaton Wash Channel is recommended not eligible under NRHP/CRHR Criteria A/1.

Criterion B/2: Significant Persons
Under NRHP Criterion B and CRHR Criterion 2, the Eaton Wash Channel lacks a significant association with the productive life of any person important in local, state, or national history. The Eaton Wash Channel was developed as a flood control channel c. 1894 and channelized between 1953 and 1964. Because the wash is essentially an undertaking of the Los Angeles County Flood Control Department, it represents the collective efforts of many individuals.

Therefore, the channel lacks a significant association with any single individual whose work rose to the level of singular importance necessary for listing, and it is recommended not eligible under NRHP/CRHR Criteria B/2.

Criterion C/3: Design/Construction
Under NRHP Criterion C and CRHR Criterion 3, the subject segment of the Eaton Wash Channel is not distinctive in terms of a particular stormwater channel type, a period, or a method of construction. Research did not identify the engineer, architect, or builder of the channel, but it appears unlikely that it was the work of a master in engineering.

Eaton Wash was channelized sometime between 1953 and 1964 using standard concrete paving, and it lacks innovation concerning its overall design, form, and function. The Eaton Wash Channel exemplifies common, standardized flood channel designs and construction methods characteristic of channels built during the mid-twentieth century and subsequently modernized throughout the twenty-first century. Additionally, research did not indicate that the Eaton Wash Channel represents an important variation, evolution, or transition of flood channel development.

Lacking sufficient design and construction value, the Eaton Wash Channel is recommended not eligible under NRHP/CRHR Criteria C/3.

Criterion D/4: Data Potential
Under NRHP Criterion D and CRHR Criterion 4, the Eaton Wash Channel is not significant as a source, or likely source, of important historical information, nor does it appear likely to yield important information about historic construction methods, materials, or technologies. Therefore, the Eaton Wash Channel is recommended not eligible under NRHP/CRHR Criteria D/4.

City of Pasadena Landmark Criteria
The Eaton Wash Channel also does not appear to meet any of the City of Pasadena’s historic resources designation criteria to be considered a landmark as outlined under Section 17.62.040(D)(2) of the Pasadena Code of Ordinances.

Criterion A: Events
Under the City of Pasadena Landmark Criterion A, the Eaton Wash Channel is not associated with any events that have made a significant contribution to the broad patterns of the history of the City As discussed in NRHP/CRHR Criteria A/1,

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research does not indicate that the subject property was associated with significant events, therefore, it is not recommended eligible for City of Pasadena Landmark Criterion A.

Criterion B: Significant Persons
Under the City of Pasadena Landmark Criterion B, the Eaton Wash Channel is not associated with the lives of persons who are significant in the history of the City. As discussed in NRHP/CRHR Criteria B/2, due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under City of Pasadena Landmark Criterion B.

Criterion C: Design/Construction
Under the City of Pasadena Landmark Criterion C, the Eaton Wash Channel is not a particularly distinctive example of a type, style, period, or method of construction, nor does it represent the work of an architect, designer, engineer, or builder whose work is of significance to the City, or possess artistic values of significance to the City. As discussed in NRHP/CRHR Criterion C/3, the subject property is a common example of a standardized flood channel built during the mid-twentieth century, and therefore, is recommended not eligible under City of Pasadena Criterion C.

Criterion D/4: Data Potential
Under the City of Pasadena Landmark Criterion D, the Eaton Wash Channel has not yielded, and is not likely to yield, information important locally in prehistory or history. As discussed in NRHP/CRHR Criterion D/4, the subject property lacks significance under City of Pasadena Criterion D.

Statement of Integrity and Conclusion
Because the Eaton Wash Channel lacks the necessary significance to meet any of the NRHP or CRHR listing criteria, or the City of Pasadena landmark designation criteria, an analysis of the structure’s physical integrity was considered unwarranted and immaterial to the overall finding that the subject property is not eligible for listing in the NRHP, CRHR, or the City of Pasadena Historic Resources Database. As such, this evaluation concludes that the subject property is not considered a historic property under Section 106 of the NHPA because it does not meet any of the NRHP evaluation criteria as described under 36 CFR § 60.4. Additionally, the subject property is not considered a historical resource for the purposes of CEQA as defined under 14 CCR § 15064.5(a).

*B12. References (continued from page 2):

City of Pasadena. 2025. “Heritage: A Short History of Pasadena.” City of Pasadena (Pasadena, CA). Accessed July 17, 2025. https://www.cityofpasadena.net/about-pasadena/history-of-pasadena/.

Data USA. 2025. “Pasadena, CA.” Data USA. Accessed July 17, 2025. https://datausa.io/profile/geo/pasadena - ca/#economy.

ECNCA (Eaton Canyon Nature Center Association). 2025. “Easton Canyon History.” Eaton Canyon Nature Center Association (Pasadena, CA). Accessed July 21, 2025. https://www.ecnca.org/history-of-eaton-canyon/.

HRG (Historic Resources Group) and Teresa Grimes Historic Preservation. 2025. City of Pasadena Public Review Draft Historic Statement. Prepared for the City of Pasadena Planning and Community Development Department of the Planning Division. Historic Resources Group (Pasadena, CA). April 2025. https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/Pasadena-Historic-Context- Statement-All-Chapters-April-2025.pdf?v=1752790006363.

NETR (Nationwide Environmental Title Research). 2025a. Historical Aerial Photographs of the City of Pasadena, CA dating from 1948,1952, 1953, 1964, 1972, 1977, 1978, 1980, 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2004, 2005, 2009, 2010, 2012, 2014, 2016, 2018, 2020, and 2022. Accessed July 2025. https://www.historicaerials.com/viewer.

NETR. 2025b. Historical Topographic Maps dating from 1894, 1896, 1898, 1900, 1904, 1907, 1908, 1910, 1913, 1915, 1920, 1927, 1928, 1931, 1940, 1941, 1955, 1960, 1968, 1975, 1988, 1994, 1999, 2012, 2015,

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2018, and 2022. Accessed July 2025. https://www.historicaerials.com/viewer.

O’Connor, Pamela. 1993. Architectural/Historical Development of the City of Pasadena – Historic Context/Property Type Report. Submitted to the California State Office of Historic Preservation. Urban Conservation Section of the City of Pasadena Planning Division (Pasadena, CA). January 13, 1993.

PDES (Pasadena Daily Evening Star). 1894. “City News.” Newspapers.com: Pasadena Daily Evening Star (Pasadena, CA). January 20, 1894. Page 3. Newspapers.com.

PI (Pasadena Independent). 1952. “L.A. County Unleashed $139,000 Flood Control Porject for Valley.” Newspapers.com: Pasadena Independent (Pasadena, CA). July 27, 1952. Page 4. Newspapers.com.

PI. 1954. “$30 Million Sought for Flood Work.” Newspapers.com: Pasadena Independent (Pasadena, CA). June 23, 1954. Page 31. Newspapers.com.

PP (Pasadena Post). 1943. “$3,462,000 Postwar Flood Control Work Planned.” Newspapers.com: Pasadena Post (Pasadena, CA). November 13, 1943. Page 5. Newspapers.com.

PS (Pasadena Star). 1911. “Mar Vista Street Extension is Asked.” Newspapers.com: Pasadena Star (Pasadena, CA).

November 4, 1911. Page 14. Newspapers.com.

PS. 1914. “Make Repairs on Eaton Wash.” Newspapers.com: Pasadena Star (Pasadena, CA). February 6, 1914. Page

9. Newspapers.com.

PS. 1915. “National Bank is Plan for Park.” Newspapers.com: Pasadena Star (Pasadena, CA). July 26, 1915. Page 6.

Newspapers.com.

PS. 1925. “George A. Damon One of Speakers.” Newspapers.com: Pasadena Star (Pasadena, CA). May 13, 1925. Page

10. Newspapers.com.

PSN (Pasadena Star News). 1925. “Co-Operate on Walnut Tunnel.” Newspapers.com: Pasadena Star News (Pasadena, CA). May 8, 1925. Page 1. Newspapers.com.

PSN. 1938. “Signers Now May Solicit Engineers.” Newspapers.com: Pasadena Star News (Pasadena, CA). July 29, 1938. Page 13. Newspapers.com.

PSN. 1939. “Rubio Canyon Flood Diversion Included in Engineers’ Report.” Newspapers.com: Pasadena Star News (Pasadena, CA). November 28, 1939. Page 10. Newspapers.com.

PSN. 1940. “Eaton Wash Job’s Approval Likely.” Newspapers.com: Pasadena Star News (Pasadena, CA). March 26, 1940. Page 13. Newspapers.com.

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*Pfa. Photographs (continued from page 1):

Photograph 2. View of the Eaton Wash, looking south. Photograph taken on June 26, 2025.

Source: Dudek, IMG_1124.

*P11. Report Citation: (Cite survey report and other sources, or enter "none.") Dudek. 2025. Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project. Prepared for the City of Pasadena. *Attachments: ☐ NONE ☒Location Map ☒Continuation Sheet ☒Building, Structure, and Object Record ☐Archaeological Record ☐District Record ☐Linear Feature Record ☐Milling Station Record ☐Rock Art Record ☐Artifact Record ☐Photograph Record ☐Sketch Map ☐Other (List):

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PRIMARY RECORD Trinomial
NRHP Status Code 6Z
Other Listings
Review Code Reviewer Date
P1. Other Identifier: N.A
*P2. Location: ☐ Not for Publication ☒ Unrestricted *a. County Los Angeles and (P2c, P2e, and P2b or P2d. Attach a Location Map as necessary.) *b. USGS 7.5' Quad Pasadena, Calif. Date 1999 T 12W; R; ¼ of ¼ of Sec 38; San Bernardino B.M. c. Address 3100 E Del Mar Boulevard City Pasadena Zip 91107 d. UTM: (Give more than one for large and/or linear resources) Zone 11, 399895 mE/ 3778400 mN e. Other Locational Data: (e.g., parcel #, directions to resource, elevation, decimal degrees, etc., as appropriate) APN 5754-031-901

*P3a. Description: (Describe resource and its major elements. Include design, materials, condition, alterations, size, setting, and boundaries)
Eaton Blanche Park is located at 3100 E Del Mar Boulevard (APN 5754-031-901) and encompasses 5.5 acres on the west side of the Eaton Wash Channel and south side of Del Mar Boulevard. The park consists of a softball field developed c. 1952, followed by the construction of two tennis courts, a softball field, a basketball court, picnic tables, open green space, a restroom, and two parking lots c. 1960, when the park was established. Play structures were developed c. 1992, and the bathroom was replaced in 2018. The park is accessed by an asphalt-paved parking lot on the south side of Del Mar Boulevard and an asphalt-paved parking lot on the north side of Millicent Way. Concrete walking paths lead from the parking lots to the sports courts, play structures, picnic area, and the restroom on the northern portion of the park (Photographs 1, 2, and 3). See Continuation Sheet. *P3b. Resource Attributes: HP31. Urban Open Space; HP39. Other (Public Park) *P4. Resources Present: ☒ Building ☐ Structure ☐ Object ☐ Site ☐ District ☐ Element of District ☐ Other (Isolates, etc.) P5b. Description of Photo: Photo 1,
IMG_1095, looking northwest,
6/26/2025.

*P6. Date Constructed/Age and
Sources:  Historic c. 1960
(NETR 2025)

*P7. Owner and Address:

City of Pasadena Department of
Public Parks and Buildings
100 N. Garfield Avenue
Pasadena, California 91101

*P8. Recorded by:

Katie Ahmanson, MHC
Dudek
225 S. Lake Ave, Ste. M210
Pasadena, CA 91101

*P9. Date Recorded:

June 26, 2025

*P10. Survey Type: Intensive

P5a. Photograph 1

*Resource Name or # Eaton Blanche Park

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BUILDING, STRUCTURE, AND OBJECT RECORD
B1. Historic Name: Eaton Blanche Park
B2. Common Name: Eaton Blanche Park
B3. Original Use: Public Park
B4. Present Use: Public Park
*B5. Architectural Style: N/A
*B6. Construction History: (Construction date, alterations, and date of alterations) Known alterations to the park include the addition of play structures c. 1992, and the replacement of the bathroom in 2018. (NETR 2025). *B7. Moved? ☒No ☐ Yes ☐ Unknown Date: Original Location:
*B8. Related Features: N/A
B9a. Architect: Unknown b. Builder: Unknown *B10. Significance: Theme N/A Area: N/A Period of Significance N/A Property Type N/A Applicable Criteria N/A (Discuss importance in terms of historical or architectural context as defined by theme, period, and geographic scope. Also address integrity.)

Eaton Blanche Park does not meet the criteria for listing in the National Register of Historic Places (NRHP), California Register of Historical Resources (CRHR), or the City of Pasadena Historic Resources Database. The property was evaluated in accordance with Section 106 of the National Historic Preservation Act (Section 106) and Section 15064.5 (a)(2)-(3) of the CEQA Guidelines using the criteria outlined in Section 5024.1 of the California Public Resources Code. The property is not considered a historic property for the purposes of Section 106 or a historical resource under CEQA. As such, this evaluation assigns a 6Z California Historical Resources Status Code to Eaton Blanche Park. See Continuation Sheet.

B11. Additional Resource Attributes: (List attributes and codes) None

*B12. References: See Continuation Sheet.

B13. Remarks: None

*B14. Evaluator: Katie Ahmanson, MHC, Dudek

*Date of Evaluation: September 5, 2025

(This space reserved for official comments.)

(Sketch Map with north arrow required.)

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0 260 520
---~="'-~= Meters
c::::J Map ID 2: Eaton Blanche Park (3100 E Del Mar Boulevard; APN 5754-031-901)

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*P3a. Description (continued from page 1)
The softball field on the southern portion of the park includes a grass lawn with a baseball diamond and outfield. A metal batting cage surrounds home plate of the baseball field on the southwest corner of the lawn (Photograph 4).

Landscaping includes a variety of plants, shrubs, mature trees, and lawns. *B10. Significance (continued from page 2):

The following historic context is adapted from Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project, prepared in October 2025 by Dudek.

Historical Overview of the City of Pasadena
The City of Pasadena was established in 1886 when it was incorporated into Los Angeles County. Initially, the area was inhabited by the Hahamogna people, who dominated the area until the arrival of the Spanish. During the Spanish period in the 1770s, the area was part of the lands under the jurisdiction of the San Gabriel MissionMembers of the local tribes were forced to build the mission structure and work on the ranch to cultivate crops. After Mexico won its independence from Spain in 1822, Alta California bec ame part of the Mexican Republic, and the Mexican government opened California to foreign trade. The area comprising present-day Pasadena became part of Rancho el Rincon de San Pascual in 1926, before it was acquired by Jose Perez and Enrique Sepulveda in the 1840s. Perez and Sepulveda subdivided a portion of the land for the development of the several single-family residences, and in 1843 Manual Garfias purchased part of the rancho in 1843 to construct a hacienda. By 1848, the United States had assumed formal control of California with the Treaty of Guadalupe-Hidalgo and introduced Anglo culture and society. Garfias continued to own the ranch until the 1860s, when he sold the property to Dr. John S. Griffin and Benjamin Davis Wilson who subdivided the land and sold off portions. Development in Pasadena continued during the 1860s, and by 1873, Griffin and Wilson divided and developed the last four separate tracts of their land (HRG 2025: 31; O’Connor 1993: 7-10).

The City of Pasadena was incorporated in 1886 during a period of agricultural growth. The fertile soil in the area lent itself to a successful local citrus industry that encouraged settlers to move to the area. Additionally, the completion of the transcontinental railroad in 1869 aided in the growth of the area as well as the transportation of local produce. The citrus industry continued to dominate the City’s economy throughout the early twentieth century, followed by the cultivation of wheat and barley. Development of early homes reflected the City’s humble beginnings with simple one and two-story wood-frame vernacular farmhouses that were later replaced with more substantial masonry buildings.

Infrastructure such as sewers, paved streets, and electrical s treet lighting were installed during 1880s and 1890s (O’Connor 1993: 12-19; City of Pasadena 2025a).

By the turn of the century, Pasadena’s economy began to shift to a tourist-based economy due to its picturesque location in the foothills of the San Gabriel Mountains. Early hotels were modest in scale and primarily promoted to tuberculosis patients who traveled to the area to benefit from its temperate climate , known to have a positive effect on health.

Pasadena’s prominence as a tourist destination began when the Pasadena Board of Trade formed in 1888 and began to “promote and encourage everything that wi ll make our beloved city more beautiful, more healthful morally and physically” (O’Connor 1993: 17). The board published Pasadena: Crown of the Valley in 1892 to promote the many recreational opportunities to tourists and residents in hopes of stimulating tourism. The San Gabirel Mountains offered visitors various recreational activities including picnicking, horseback riding, hiking, hunting, and fishing. Developed of grand hotels such as the Hotel Green, in 1894, the Raymond Hotel in 1901, and the Hotel Maryland in 1903, led to a wave of tourists enamored by the local climate and amenities (O’Connor 1993: 17-20).

During the 1910s and 1920s, tourists began to purchase land and construct vacation homes for their winter stays.

Mansions replaced many of the early modest residences associated with the agricultural industry, and the street Orange Grove, named after its vicinity to local citrus orchards, became known as “Millionaires’ Row”. As Pasadena developed into a modern city, it enticed middle and working-class residents who supported the construction industry with laborers, brick makers, and hospitality workers at t he hotels. Residential development patterns at this time reflected socio - economic and racial boundaries. The southwest portion of the city consisted of wealthy, primarily white residents, while middle-class residents occupied the areas north and east of the city center (O’Connor 1993: 20-21).

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The Great Depression (1929–1939) impacted industries and communities throughout the city, especially working-class jobs such as domestic workers and retail clerks. Although the population of Pasadena reached 76,000 residents by 1930, the city’s industrial base decreased from 191 companies in 1920 to 150 companies in 1930. Many of the large hotels that struggled at this time resulted in the demolition of some, like the Hotel Maryland in 1935, and the conversion of others for different uses (O’Connor 1993: 21-22). Additionally, many of the mansions along Millionaires’ Row were abandoned or converted into boarding houses, leading to the area being rezoned for multi-family development in 1948.

Wartime employment during the onset of World War II in 1941 saw a small increase in the population as servicemen passed through Los Angeles on their way to and from the war. However, development largely slowed during the beginning of the war (O’Connor 1993: 33).

After World War II, a massive wave of migration and building boom occurred throughout California. Pasadena experienced a population increase of over 22,000 residents between 1940 and 1950 with new residential tracts developed in the Allendale, Upper Hastings, Kinneloa, San Rafael, and Linda Vista neighborhoods of the city. With the advent of the state and federal highway systems during the 1950s and 1960s, automobiles allowed travelers to take themselves to places that were only previously accessible by railroads. The highway system encouraged tourism that propelled the city’s economy and spurred growth in the surrounding areas. This growth is reflected in the city’s present- day built environment that includes residential development along public transportat ion lines and commercial development along major commercial routes. Residential partitioning enforced zoning ordinances with specific building standards and lot controls characterized by concentrations of single-family residences with distinctive planning features such as street alignments, setbacks, curbs, sidewalks, and landscaping (O’Connor 1993: 33 -43). Historical aerial photographs show that Pasadena was primarily developed by the 1980s (NETR 2025). In recent years, the economy has shifted to support a variety of industries including health care and social assistance, professional, scientific, and technical services, and educational services. As of 2023, the population in Pasadena included over 136,000 residents (Data USA 2025).

Development of Public Parks in Pasadena
In April 2025, Historic Resources Group completed a citywide historic context for the City of Pasadena as a part of the City’s effort to create a historic preservation program to provide a baseline through which to evaluate historical resources (HRG 2025). The following information was summarized from the City of Pasadena’s Historic Context Statement report. In addition, this overview is organized by the periods of development identified in the historic context statement. A citation with information on accessing the full historic context statement is included in the references section of this report.

The geography and topography of the City of Pasadena are defined by its location within the northern portion of the San Gabriel Valley, a large sloping alluvial plain within the Los Angeles Basin. Pasadena is bounded by the Raymond Fault line, the San Rafael Hills, and the San Gabriel Mountains. Water is naturally available via numerous rivers, springs, and artesian wells, including the Arroyo Seco (referred to as the Arroyo) and the Eaton Wash Channel (located within Eaton Canyon). The area’s plant communities include Coastal Sage Scrub and Southern Oak Woodlands (HRG 2025: 10).

Late Nineteenth Century to Early Twentieth Century Development During the late 19th century, the Arroyo informally functioned as a public park, having become part of a trail system leading up to a famous retreat in the San Gabriel Mountains above Pasadena. Established by Harvey Walker and Perry Switzer in 1880, the retreat was commonly referred to as Switzer’s Camp and was popular with nature enthusiasts who were drawn to the scenery and fresh air. During this period, the Arroyo was used for a variety of activities such as horseback riding, camping, hunting, fishing, hiking, and picnicking, although it was privately owned (HRG 2025: 357).

The first public parks in Pasadena were modest land acquisitions that had dual purposes. Library Park (1902, now Memorial Park) on N. Raymond Avenue is a five -acre park that embraced the City's first public library. Central Park (1902) is a ten-acre park that mostly benefited the guests of the Hotel Green, located just to the north. With the creation of these two parks, the City formed a new Department of Public Parks and Buildings (HRG 2025: 357). Historically, as streets were developed, property owners planted their favorite trees, resulting in a random mixture of trees on any given block. As early as 1904, the Park Department had established rules for watering, pruning, and planting trees. The City, however, did not yet have a street tree planting program due to the cost. In 1908, a municipal nursery was established

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near Devil’s Gate Gorge. Soon, another municipal nursery was established at the south end of town on Glenarm Street.

By 1916, the City had planted 17,306 trees, but did not always adhere to the plan for uniformity (HRG 2025: 359).

Lower Arroyo Seco Park & Brookside Park
Arguably, the Department’s greatest achievement was the development of the Lower Arroyo Seco Park between 1909 and 1918 and Brookside Park in 1914. By this time, the department was simply called the Park Department. Although the Arroyo was used for recreational purposes, as the population grew it was also used for dumping and logging . In 1898, journalist Charles Lummis started a campaign for the preservation of the Arroyo and became the first president of the Arroyo Seco Foundation (HRG 2025: 359). This was the first time a group banded together to promote the preservation of the Arroyo. The Lower Arroyo became the focus of the early plans developed by the Arroyo Park Association, another group that formed in 1906. Dr. Rudolph Schiffmann (1845-1926), who also sat on the Board of City Commissioners, was elected as the president of the group in 1907. In 1909, he purchased a two and one-half acre wooded lot at the end of Bradford Street and donated it to the City for use as a public park. In 1911, a bond issue was passed by voters, authorizing the purchase of private land in the Arroyo. The City bought the first parcel of 30 acres for $4,500. By 1912, the City held or had options on 200 acres. A syndicate of wealthy citizens bought up most of the remaining options and held them in a trust until the City could purchase the parcels (HRG 2025: 360).

Throughout the beginning of 1914, the park was referred to as Arroyo Springs Park. However, the name was not used for very long. That same year Anna Jennings Brooks (1847-1917) donated $3,000 for the construction of a municipal plunge in the park. Apparently, the cost of the plunge exceeded the donation as the City contributed another $2,000 towards its construction. The park was named Brookside Park in Brooks’ honor (HRG 2025: 360).

The facilities in Brookside Park reflected the growth of competitive sports and the changing recreational tastes and needs of the population. In recognition of those trends, a committee of the Pasadena Civic Federation hired landscape architect Emanuel Tillman Mische (1870-1934) to prepare a comprehensive plan for the Arroyo. Between 1917 and 1918, Mische developed a plan for the Arroyo that encompassed the entire area from the South Pasadena city limits to the mountains north of Devil’s Gate Gorge. The 191 8 Arroyo Seco Park Plan combined both passive and active recreational uses (HRG 2025: 362-363).

Recreation in the Arroyo Seco & The Rose Bowl Stadium
Two practical matters dictated using the Central Arroyo for sports and recreational facilities: Brookside Park already existed, and it was the widest, flattest land in the canyon. The 1918 Plan was implemented to the extent that the Lower and Central Arroyo were developed with passive and active recreational uses, respectively. The present-day circulation system, landscaping, and golf course are also remnants of the 1918 Plan. However, the Rose Bowl Stadium, which dominates the Central Arroyo, was not anticipated. The area occupied by the stadium is shown as an undefined open space in the 1918 Plan . Completed in 1922, the Rose Bowl Stadium is the long -term site of the oldest and most renowned post-season college football game, the Rose Bowl. In 1897, the City purchased ten acres of land located in the Arroyo. In 1921, construction commenced, and the structure was completed the following year with the south end open, giving the stadium its original “horseshoe” shape (HRG 2025: 363). 1920s-1930s Park Expansion
By 1930, Pasadena boasted over 1,000 acres of parkland for its 76,086 residents. As the population of the city grew dramatically during the 1920s and 1930s, parks and recreation facilities became less of a luxury and more of a necessity. There were more residents with more leisure time as houses were replaced by apartment buildings and the 40-hour work week was instituted (HRG 2025: 365). In 1924, the department conducted a survey and created a plan for each street based upon the zoning (residential, commer cial, industrial), width of the street and sidewalk, and consideration of overhead utility wires. The survey concluded that the most effective way to prevent the spread of pests and diseases was through diversity. While the trees on any given street would be uniform, from one street to another, they could be different (HRG 2025: 368).

Between 1924 and 1930, on average the Park Department was planting 5,000 trees annually. Beginning in 1940 with the inception of the Official Street Tree List, the City adopted a policy to adhere to a uniform street tree planting program.

At this time, 136 of the 392 streets had been planted with California live oaks. Over time, the Park Department (later

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the Public Works Department) revised the Official Street Tree List based upon horticultural and environmental factors indicating that some species were no longer suitable as street trees (HRG 2025: 368).

The department's most ambitious plan was the development of a large scenic public park in Eaton Canyon, similar to the one in the Arroyo. During the Great Depression, however, the City could not afford to purchase the land. Slowly, the City obtained approximately 24 acres of land through small donations, while the Water Department separately acquired 200 acres in the upper portion of the canyon. In 1932, the City began working in cooperation with the Los Angeles County Flood Control District and the Los Angeles County Planning Commission for the development of the Eaton Canyon Regional Park. Eventually, the entire project was taken over by the County of Los Angeles and now includes a natural park and a golf course (HRG 2025: 369).

Post-World War II Expansion
After World War II, numerous new parks were created in Pasadena to keep pace with the growing population. Most postwar parks were two to three acres in size and their design emphasized recreation for the body over restoration of the spirit. Most include picnic areas, play areas with equipment for children, and restroom buildings at a minimum.

Depending on the neighborhood which increasingly included northern and eastern Pasadena, sports and recreation facilities might include basketball, tennis, and volleyball courts; baseball and softball diamonds; and multi- purpose athletic fields. The first two parks created during the postwar period involved land purchased from the Board of Education. Jefferson Park in 1945 and Grant Park in 1948 were created on land that was previously occupied by public schools with the same names. Created in 1951, Allendale Park is like La Pintoresca Park in that it includes a Public Library branch building. Three other parks are associated with City reservoirs as opposed to libraries. Hamilton Park was created in 1952 and was originally called Hastings Ranch Park. It was renamed in 1958 in honor of Arthur L.

Hamilton (1859-1953). McDonald Park was dedicated in 1920 in honor of Judge Robert W. McDonald (1868-1918), who succumbed to the 1918 influenza pandemic. The abandonment of the reservoir in 1977 led to the idea of creating a park on the rest of the block. The Villa Parke Community Center has a somewhat similar origin story. The land includes what was originally the Villa Reservoir, which was constructed in 1925. With changes in the City’s water distribution system, the structure was abandoned in 1947 and the property was sold to the Pasadena Boys Club, but the City retained an easement. In the early 1970s, the City created a public park on the property (HRG 2025: 370-371).

The largest park in Pasadena created during the postwar era is Victory Park. It was conceived in 1945 by the Pasadena War Memorial Committee as a tribute to those in the community who served in World War II; however, as soon as planning began, the program included an exhibition area for the display of Rose Parade floats in addition to a multi- purpose building for veteran’s activities. By 1946, a 45-acre site near Eaton Canyon had been identified. The City had attempted to buy a 50-acre site in the area owned by Los Angeles County; however, the offer was rejected. By this time, the Pasadena Citizen’s Council for Planning was also advocating for more parks and recreation facilities in eastern Pasadena. The park was dedicated in 1952, but in 1961 it was redesigned after the Pasadena High School campus moved from Pasadena City College to Sierra Madre Boulevard. To the chagrin of many members of the community, the north 15 acres of Victory Park were sold to the Pasadena Unified School District for sports facilities for Pasadena High School (HRG 2025: 371-372)
In December 1967, Ronald B. Townsend (1913-1997), the City’s director of parks since 1954, attempted to revive the 1932 plan for Eaton Canyon. He approved a plan entitled the Eaton Canyon Area Development. This plan also proposed an interconnected system of parks and open space areas along the Eaton Canyon drainage. The proposed improvements were laid out in great detail and connections with the City’s existing parks, such as Victory Park and Eaton-Blanche Park, were included. The City’s current Green Space , Recreation and Parks Master Plan revisits this concept and offers recommendations for implementation measures that would fulfill a portion of the vision that was expressed in the 1932 and 1967 plans (HRG 2025: 372).

Development of Eaton Blanche Park
Eaton Blanche Park is a 5.5 -acre public park located at 3100 E Del Mar Boulevard (APN 5754 -031-901) in the southeast section of the City of Pasadena, California. Facilities include two tennis courts, a softball field, a basketball court, play structures, picnic tables, open green space, restrooms, and two parking lots (City of Pasadena 2025b). The park was developed c. 1960 in conjunction with the County Parks and Recreation Department as part of their planned

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program to equalize park facilities nLAT 1961: 210). Historic aerial photographs show that the softball field was present on the property as early as 1952. Eaton Blanche Park was developed with two tennis courts, a basketball court, a restroom, and a covered picnic area c. 1960 (NETR 2025). In 1967, the Eaton Canyon Area Development plan proposed improvements to the park that would connect it to the other existing parks along the Eaton Canyon Wash (HRG 2025:
372). The Mount Wilson hiking trail was developed by 1968 to connect the parks from Eaton Canyon to Eaton Blanche Park to the south (LAT 1968: 108). Another covered picnic area was added by 1980; however, it was demolished by 1992 for the construction of a play area with play structures. The restroom was demolished in 2016, and a new restroom was constructed by 2018. The park appears to remain primarily unaltered since then and appears to have continued to function as a public park to the present (NETR 2025).

Statement of Significance
NRHP/CRHR Criteria
Eaton Blanche Park was evaluated in consideration of the NRHP and CRHR criteria and integrity requirements. As a result of the evaluation, Eaton Blanche Park is recommended not eligible for inclusion in the NRHP or CRHR due to a lack of significant associations.

Criterion A/1: Events
Under NRHP Criterion A and CRHR Criterion 1, archival research did not find that Eaton Blanche Park possesses a direct and important association with any events or pattern of events significant in local, state, or national history. The subject property was constructed during the post-World War II expansion of the public parks system in Pasadena. This growth in parks was reflective of the local and state-wide population increase in the decades following World War II’s conclusion in 1945. Numerous parks were developed and renovated during this period, with the first park, Jefferson Park, developed in 1945. Post-World War II growth was an important trend both regionally and in California; however, this property did not contribute in any significant way to this pattern of development. It is also not known to be directly associated with events that have made a significant contribution to the history of Pasadena, California, or the nation. It was neither the first nor the last park developed in the city and was merely following a continuous pattern of increased park development in the post-war period, and did not directly influence development in the region. Research also did not identify a significant historical event that occurred on the property. Therefore, Eaton Blanche Park does not meet NRHP/CRHR Criteria A/1.

Criterion B/2: Significant Persons
Under NRHP Criterion B and CRHR Criteria 2, Eaton Blanche Park lacks a significant association with the productive life of any person important in local, state, or national history. Research revealed that the park was developed and operated by the City of Pasadena Department of Public Parks and Buildings c. 1960, during a period of park expansion throughout the city. Today, the subject property is one of several parks owned and operated by the City of Pasadena. Research did not identify any information indicating that individuals associated with the city government mad e a significant contribution to the management of Eaton Blanche Park, which would rise to the threshold of significance required for eligibility. Due to a lack of identified significant associations with any persons important in our past, Eaton Blanche Park is recommended not eligible under NRHP/CRHR Criteria B/2.

Criterion C/3: Design/Construction
Under NRHP Criterion C and CRHR Criterion 3, Eaton Blanche Park is not distinctive in terms of a particular park type, a period, or a method of construction. The subject property was developed as a public park c. 1960 to provide green space to the growing local community. It has been renovated over the years, including the addition of play structures c. 1992, and the replacement of the bathroom in 2018. The park reflects a common park design that lacks innovation with regard to its overall design, form, and function. Additionally, research did not indicate that Eaton Blanche Park is associated with the work of a master architect or builder. As it is a common, purpose-built, property type and style, it is unlikely that it was the work of a master architect or builder. Eaton Blanche Park does not contribute to the significance of a potential or existing historic district. Overall, the property lacks sufficient design and construction value to meet NRHP/CRHR Criteria C/3.

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Criterion D/4: Data Potential
Under NRHP Criterion D and CRHR Criterion 4, the subject property is not significant as a source, or likely source, of important historical information, nor does it appear likely to yield important information about historic construction methods, materials, or technologies. This technology is well understood through contemporary trade journals and scientific monographs. As such, Eaton Blanche Park lacks significance under NRHP/CRHR Criteria D/4.

City of Pasadena Landmark Criteria
Eaton Blanche Park also does not appear to meet any of the City of Pasadena’s historic resources designation criteria to be considered a landmark as outlined under Section 17.62.040(D)(2) of the Pasadena Code of Ordinances.

Criterion A: Events
Under the City of Pasadena Landmark Criterion A, Eaton Blanche Park is not associated with any events that have made a significant contribution to the broad patterns of the history of the City. As discussed in NRHP/CRHR Criteria A/1, research does not indicate that the subject property was associated with significant event s, therefore, it is not recommended eligible for City of Pasadena Landmark Criterion A.

Criterion B: Significant Persons
Under the City of Pasadena Landmark Criterion B, Eaton Blanche Park is not associated with the lives of persons who are significant in the history of the City. As discussed in NRHP/CRHR Criteria B/2, due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under City of Pasadena Landmark Criterion B.

Criterion C: Design/Construction
Under the City of Pasadena Landmark Criterion C, Eaton Blanche Park is not a particularly distinctive example of a type, style, period, or method of construction, nor does it represent the work of an architect, designer, engineer, or builder whose work is of significance to the City, or possess artistic values of significa nce to the City. As discussed in NRHP/CRHR Criterion C/3, the subject property is a common example of a park designed and renovated in the mid to late twentieth century, and therefore, is recommended not eligible under City of Pasadena Landmark Criterion C.

Criterion D/4: Data Potential
Under the City of Pasadena Landmark Criterion D, Eaton Blanche Park has not yielded, and is not likely to yield, information important locally in prehistory or history. As discussed in NRHP/CRHR Criterion D/4, the subject property lacks significance under City of Pasadena Landmark Criterion D.

Statement of Integrity and Conclusion
Because Eaton Blanche Park the necessary significance to meet any of the NRHP or CRHR listing criteria, or the City of Pasadena landmark designation criteria, an analysis of the structure’s physical integrity was considered unwarranted and immaterial to the overall finding that the subject property is not eligible for listing in the NRHP, CRHR, or the City of Pasadena Historic Resources Database. As such, this evaluation concludes that the subject property is not considered a historic property under Section 106 of the NHPA because it does not meet any of the NRHP evaluation criteria as described under 36 CFR § 60.4. Additionally, the subject property is not considered a historical resource for the purposes of CEQA as defined under 14 CCR § 15064.5(a).

*B12. References (continued from page 2):

City of Pasadena. 2025a. “Heritage: A Short History of Pasadena.” City of Pasadena (Pasadena, CA). Accessed July 17, 2025. https://www.cityofpasadena.net/about-pasadena/history-of-pasadena/.

City of Pasadena. 2025b. “Eaton Blanche Park.” City of Pasadena (Pasadena, CA). Accessed July 24, 2025. https://www.cityofpasadena.net/parks-and-rec/parks/eaton-blanche-park/.

Data USA. 2025. “Pasadena, CA.” Data USA. Accessed July 17, 2025. https://datausa.io/profile/geo/pasadena -

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ca/#economy.

HRG (Historic Resources Group) and Teresa Grimes Historic Preservation. 2025. City of Pasadena Public Review Draft Historic Statement. Prepared for the City of Pasadena Planning and Community Development Department of the Planning Division. Historic Resources Group (Pasadena, CA). April 2025. https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/Pasadena-Historic-Context- Statement-All-Chapters-April-2025.pdf?v=1752790006363.

NETR (Nationwide Environmental Title Research). 2025. Historical Aerial Photographs of the City of Pasadena, CA dating from 1948,1952, 1953, 1964, 1972, 1977, 1978, 1980, 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2004, 2005, 2009, 2010, 2012, 2014, 2016, 2018, 2020, and 2022.

Accessed July 2025. https://www.historicaerials.com/viewer.

O’Connor, Pamela. 1993. Architectural/Historical Development of the City of Pasadena – Historic Context/Property Type Report. Submitted to the California State Office of Historic Preservation. Urban Conservation Section of the City of Pasadena Planning Division (Pasadena, CA). January 13, 1993.

LAT (Los Angeles Times). 1961. “Cities May Run Out of Room for Outdoor Play in Future.” Newspapers.com: Los Angeles Times (Los Angeles, CA). March 12, 1961. Page 1. Newspapers.com.

LAT. 1968. “Recreation Urged Along Eaton Wash.” Newspapers.com: Los Angeles Times (Los Angeles, CA). March 1, 1968. Page 108. Newspapers.com.
*Pfa. Photographs (continued from page 1):

Photograph 2. View of the play structure, looking northeast. Photograph taken on June 26, 2025.

Source: Dudek, IMG_1094.

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Photograph 3. View of the picnic area, looking north. Photograph taken on June 26, 2025.

Source: Dudek, IMG_1099.

Photograph 4. View of the softball field, looking southwest. Photograph taken on June 26, 2025.

Source: Dudek, IMG_1104.

*P11. Report Citation: (Cite survey report and other sources, or enter "none.") Dudek. 2025. Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project. Prepared for the City of Pasadena. *Attachments: ☐ NONE ☒Location Map ☒Continuation Sheet ☒Building, Structure, and Object Record ☐Archaeological Record ☐District Record ☐Linear Feature Record ☐Milling Station Record ☐Rock Art Record ☐Artifact Record ☐Photograph Record ☐Sketch Map ☐Other (List):

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NRHP Status Code 6Z
Other Listings
Review Code Reviewer Date
P1. Other Identifier: Earthside Nature Center
*P2. Location: ☐ Not for Publication ☒ Unrestricted *a. County Los Angeles and (P2c, P2e, and P2b or P2d. Attach a Location Map as necessary.) *b. USGS 7.5' Quad Pasadena, Calif. Date 1999 T 12W; R; ¼ of ¼ of Sec 38; San Bernardino B.M. c. Address 3160 East Del Mar Boulevard City Pasadena Zip 91107 d. UTM: (Give more than one for large and/or linear resources) Zone 11, 399895 mE/ 3778400 mN e. Other Locational Data: (e.g., parcel #, directions to resource, elevation, decimal degrees, etc., as appropriate) APN 5754-030-901

*P3a. Description: (Describe resource and its major elements. Include design, materials, condition, alterations, size, setting, and boundaries)
The former Earthside Nature Center site on the rear of the property at 3160 East Del Mar Boulevard (APN 5754-030-901) contains two features related to the previous history of the site: a wood post entrance and a plaque. The wood post entrance on the north end of the site consists of a post and lintel structure with signage displaying “Earthside Nature Center” (Photograph 1). The plaque is affixed to a stone just beyond the entrance, and contains an inscription reading, “With Deep Appreciation Frances G. ‘Terry’ Lee Memorial Redwood Grove 1992” (Photograph 2). Chain-link fencing encases the property, and although many of the original plantings have been replaced by weeds and shrubs, some trees remain (Photograph 3).

However, the plants appear in poor condition, and there is no formal landscaping present. The site is bordered by the Eaton Wash Channel to the west and south, Exer Urgent Care to the north, and a plant nursery to the east.

*P3b. Resource Attributes: HP31. Urban Open Space
*P4. Resources Present: ☐ Building ☒ Structure ☐ Object ☐ Site ☐ District ☐ Element of District ☐ Other (Isolates, etc.)
P5b. Description of Photo: Photo 1,
IMG_4126, looking southeast,
6/26/2025.

*P6. Date Constructed/Age and
Sources:  Historic
1971 (Gilmore et al 2009)

*P7. Owner and Address:

Southern California Edison
Company
2244 Walnut Grove Avenue
Rosemead, California 91770

*P8. Recorded by:

Katie Ahmanson, MHC
Dudek
225 S. Lake Ave, Ste. M210
Pasadena, CA 91101

*P9. Date Recorded:

June 26, 2025

*P10. Survey Type: Intensive

P5a. Photograph 1

*Resource Name or # Earthside Nature Center Site

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BUILDING, STRUCTURE, AND OBJECT RECORD
B1. Historic Name: Earthside Nature Center
B2. Common Name: Earthside Nature Center
B3. Original Use: Community Garden
B4. Present Use: Community Garden
*B5. Architectural Style: N/A
*B6. Construction History: (Construction date, alterations, and date of alterations) Known alterations to the property include the demolition and removal of features formerly associated with the site, such as benches, tables, a kiosk, plaques, and sheds, and the removal of original plantings at unknown dates (NETR 2025). *B7. Moved? ☒No ☐ Yes ☐ Unknown Date: Original Location:
*B8. Related Features: N/A
B9a. Architect: Unknown b. Builder: Unknown *B10. Significance: Theme N/A Area: N/A Period of Significance N/A Property Type N/A Applicable Criteria N/A (Discuss importance in terms of historical or architectural context as defined by theme, period, and geographic scope. Also address integrity.)

The Earthside Nature Center Site does not meet the criteria for listing in the National Register of Historic Places (NRHP), California Register of Historical Resources (CRHR), or the City of Pasadena Historic Resources Database. The property was evaluated in accordance with Section 106 of the National Historic Preservation Act (Section 106) and Section 15064.5 (a)(2)-(3) of the CEQA Guidelines using the criteria outlined in Section 5024.1 of the California Public Resources Code. The property is not considered a historic property for the purposes of Section 106 or a historical resource under CEQA. As such, this evaluation assigns a 6Z California Historical Resources Status Code to the Earthside Nature Center Site. See Continuation Sheet.

B11. Additional Resource Attributes: (List attributes and codes) None

*B12. References: See Continuation Sheet.

B13. Remarks: None

*B14. Evaluator: Katie Ahmanson, MHC, Dudek

*Date of Evaluation: September 5, 2025

(This space reserved for official comments.)

(Sketch Map with north arrow required.)

0 10 20
~ Mele~

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0 260 520
---~="'-~= Meters
c::::J Map ID 3: Earthside Nature Center Site (on the rear of the property at 3160 East Del Mar Boulevard; APN 5754-030-901)

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*B10. Significance (continued from page 2):

The following historic context is adapted from Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project, prepared in October 2025 by Dudek.

Historical Overview of the City of Pasadena
The City of Pasadena was established in 1886 when it was incorporated into Los Angeles County. Initially, the area was inhabited by the Hahamogna people, who dominated the area until the arrival of the Spanish. During the Spanish period in the 1770s, the area was part of the lands under the jurisdiction of the San Gabriel MissionMembers of the local tribes were forced to build the mission structure and work on the ranch to cultivate crops. After Mexico won its independence from Spain in 1822, Alta California bec ame part of the Mexican Republic, and the Mexican government opened California to foreign trade. The area comprising present-day Pasadena became part of Rancho el Rincon de San Pascual in 1926, before it was acquired by Jose Perez and Enrique Sepulveda in the 1840s. Perez and Sepulveda subdivided a portion of the land for the development of the several single-family residences, and in 1843 Manual Garfias purchased part of the rancho in 1843 to construct a hacienda. By 1848, the United States had assumed formal control of California with the Treaty of Guadalupe-Hidalgo and introduced Anglo culture and society. Garfias continued to own the ranch until the 1860s, when he sold the property to Dr. John S. Griffin and Benjamin Davis Wilson who subdivided the land and sold off portions. Development in Pasadena continued during the 1860s, and by 1873, Griffin and Wilson divided and developed the last four separate tracts of their land (HRG 2025: 31; O’Connor 1993: 7-10).

The City of Pasadena was incorporated in 1886 during a period of agricultural growth. The fertile soil in the area lent itself to a successful local citrus industry that encouraged settlers to move to the area. Additionally, the completion of the transcontinental railroad in 1869 aided in the growth of the area as well as the transportation of local produce. The citrus industry continued to dominate the City’s economy throughout the early twentieth century, followed by the cultivation of wheat and barley. Development of early homes reflected the City’s humble beginnings with simple one and two-story wood-frame vernacular farmhouses that were later replaced with more substantial masonry buildings.

Infrastructure such as sewers, paved streets, and electrical s treet lighting were installed during 1880s and 1890s (O’Connor 1993: 12-19; City of Pasadena 2025).

By the turn of the century, Pasadena’s economy began to shift to a tourist-based economy due to its picturesque location in the foothills of the San Gabriel Mountains. Early hotels were modest in scale and primarily promoted to tuberculosis patients who traveled to the area to benefit from its temperate climate , known to have a positive effect on health.

Pasadena’s prominence as a tourist destination began when the Pasadena Board of Trade formed in 1888 and began to “promote and encourage everything that wi ll make our beloved city more beautiful, more healthful morally and physically” (O’Connor 1993: 17). The board published Pasadena: Crown of the Valley in 1892 to promote the many recreational opportunities to tourists and residents in hopes of stimulating tourism. The San Gabirel Mountains offered visitors various recreational activities including picnicking, horseback riding, hiking, hunting, and fishing. Developed of grand hotels such as the Hotel Green, in 1894, the Raymond Hotel in 1901, and the Hotel Maryland in 1903, led to a wave of tourists enamored by the local climate and amenities (O’Connor 1993: 17-20).

During the 1910s and 1920s, tourists began to purchase land and construct vacation homes for their winter stays.

Mansions replaced many of the early modest residences associated with the agricultural industry, and the street Orange Grove, named after its vicinity to local citrus orchards, became known as “Millionaires’ Row”. As Pasadena developed into a modern city, it enticed middle and working-class residents who supported the construction industry with laborers, brick makers, and hospitality workers at t he hotels. Residential development patterns at this time reflected socio - economic and racial boundaries. The southwest portion of the city consisted of wealthy, primarily white residents, while middle-class residents occupied the areas north and east of the city center (O’Connor 1993: 20-21).

The Great Depression (1929–1939) impacted industries and communities throughout the city, especially working-class jobs such as domestic workers and retail clerks. Although the population of Pasadena reached 76,000 residents by 1930, the city’s industrial base decreased from 191 companies in 1920 to 150 companies in 1930. Many of the large hotels that struggled at this time resulted in the demolition of some, like the Hotel Maryland in 1935, and the conversion of others for different uses (O’Connor 1993: 21-22). Additionally, many of the mansions along Millionaires’ Row were

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abandoned or converted into boarding houses, leading to the area being rezoned for multi-family development in 1948.

Wartime employment during the onset of World War II in 1941 saw a small increase in the population as servicemen passed through Los Angeles on their way to and from the war. However, development largely slowed during the beginning of the war (O’Connor 1993: 33).

After World War II, a massive wave of migration and building boom occurred throughout California. Pasadena experienced a population increase of over 22,000 residents between 1940 and 1950 with new residential tracts developed in the Allendale, Upper Hastings, Kinneloa, San Rafael, and Linda Vista neighborhoods of the city. With the advent of the state and federal highway systems during the 1950s and 1960s, automobiles allowed travelers to take themselves to places that were only previously accessible by railroads. The highway system encouraged tourism that propelled the city’s economy and spurred growth in the surrounding areas. This growth is reflected in the city’s present- day built environment that includes residential development along public transportat ion lines and commercial development along major commercial routes. Residential partitioning enforced zoning ordinances with specific building standards and lot controls characterized by concentrations of single-family residences with distinctive planning features such as street alignments, setbacks, curbs, sidewalks, and landscaping (O’Connor 1993: 33 -43). Historical aerial photographs show that Pasadena was primarily developed by the 1980s (NETR 2025). In recent years, the economy has shifted to support a variety of industries including health care and social assistance, professional, scientific, and technical services, and educational services. As of 2023, the population in Pasadena included over 136,000 residents (Data USA 2025).

Development of the Earthside Nature Center
The Earthside Nature Center, located on the rear of the property at 3160 East Del Mar Boulevard (APN 5754-030-901) in Pasadena, California, was established on about two acres in 1971. Before the development of the nature center, Southern California Edison Company (SoCal Edison) purchased the property and used it for a transmission line corridor in 1951. The property contained transmission lines and was primarily used as a dumping site. The Pasadena Girls Club acquired use of the property from SoCal Edison c.1955 and constructed a clubhouse on the northern portion along East Del Mar Boulevard. The girls helped to plant a garden on the property and used the site for activities before the Earthside Nature Center was founded by naturalist Elna Bakker, and Kevin Connelly in 1971. Volunteers helped to develop a garden on the property with donated plants of a variety of native species (Gilmore et al 2009; Barber 1985). By 1987, the nature center was reported to be a “microcosm of the California plant work” with a flourishing garden tended to by the volunteers. During the 1980s, the nature center provided tours to the public and held annual Wildflower Walkabouts that encouraged visitors to picnic and explore the property (LAT 1987: 76). In 1989, the Earthside Nature Center was awarded the American Horticultural Society’s (AHS) Award for Urban Beautification for its grassroots efforts to create an equitable community space using plants and nature. The AHS Awards Program was established in 1953 with four awards: the Horticultural Writing, Professional, Teaching, and Scientific awards. It was expanded in 1985 to include the Urban Beautification Award, now known as the Community Greening Award, to honor community beautification efforts across the nation. During the mid-1990s, the AHS Awards Program evolved to the Great American Gardeners Awards program and was expanded to include diverse categories of awards that “celebrate those who exemplify dedication to the art, science, and environmental stewardship of horticulture across the United States” (AHS 2025). Volunteers continued to maintain the gardens and conduct tours of the nature cent er in the early 1990s. However, it was abandoned in 1995 after the deaths of Bakker and Connelly (Gilmore et al 2009). According to historic aerial photographs, the original 66 kilovolt (kV) transmission lines on the property were replaced with 220 kV transmission lines with steel lattice towers c. 2005 (NETR 2025).

In 2008, local open space activist Michael Coppess discovered the abandoned Earthside Nature Center site and began efforts to revitalize the property. Coppess documented the remains of the nature center in his blog, East of Allen, which highlighted the history of the site and garnered community attention. In 2009, a group of graduate students from California Polytechnic University, Pomona, conducted a study of the site and inventoried the remnants of the center, including the wood post entrance, a kiosk, benches, tables, a potting shed, a storage shed, signage, trails, and plaques.

However, the study concluded that most of the plantings, such as wildflowers, shrubs, trees, and exotic plants, are in poor health or have been replaced with weeds. After over a decade of abandonment, the site lacked maintenance and had become overrun with Non -native grasses, shrubs, and trees, and an extensive removal and replanting process

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would be necessary to revitalize the site. The students presented their findings at the Pasadena Open Space Fair on February 28, 2009, to promote community engagement with the site and recommend alternative designs for the property. Although public interest in the revitalization of the property prompted the city to adopt its Open Space Element to reestablish the center, it has remained abandoned to the present (Coppess 2008; Gilmore et al 2009; LAT 1995:
20). As of 2025, the site remains in poor condition, and only the wood post entrance and a plaque remain, with few original plantings left. Pasadena’s proposed Eaton Wash Stormwater Capture Project has spurred interest in the site once again, and the city has developed a Site Concept Design that is out for public comment. The final design for the site is expected to be approved by spring 2026, and it will possibly result in the redevelopment of the site in the future (Coppess 2025).

NRHP/CRHR Criteria
The Earthside Nature Center site was evaluated in consideration of the NRHP and CRHR criteria and integrity requirements. As a result of the evaluation, the Earthside Nature Center site is recommended not eligible for inclusion in the NRHP or CRHR due to a lack of significant associations.

Criterion A/1: Events
Under NRHP Criterion A and CRHR Criterion 1, the Earthside Nature Center site lacks a direct and important association with any event significant in local, state, or national history. The nature center was established on the property in 1971 as a community garden planted by volunteers. It was known for its variety of native plantings and offered tours as well as public events. In 1989, it was awarded the American Horticultural Society’s Award for Urban Beautification, however,, it was abandoned in 1995 and left without maintenance since. Presently, only two features formerly associated with the site remain, and many of the original plantings have been overgrown with weeds. Although the Earthside Nature Center appears to have been an exceptional community garden within Pasadena from the 1970s to 1990s gaining national recognition in 1989, the site has not been maintained over the years and no longer retains sufficient integrity to reflect its history. The loss of the majority of original features on the proper ty has altered its integrity of design, materials, workmanship, and feeling. Integrity of association is lost because the alterations and changes in use have rendered it unable to convey its historic character. The two extant features, the wood post entrance and plaque, do not sufficiently reflect the history of the site to meet NRHP orCRHR Criterion A/1. As such, the Earthside Nature Center site does not possess associative significance under NRHP/CRHR Criteria A/1.

Criterion B/2: Significant Persons
Under NRHP Criterion B and CRHR Criterion 2, the Earthside Nature Center lacks a significant association with the productive life of any person important in local, state, or national history. Research indicates that SoCal Edison has owned the property since 1951, and it has been occupied by three organizations from c. 1955 to 2025. The property was used by the Girls Club of Pasadena for club activities from c. 1955 to 1971, when the Earthside Nature Center was established on the property by Elna Bakker and Kevin Connelly. Although Bakker was well known in her field as a naturalist, her career does not appear to be significantly associated with the subject property. She is best known as an author with several books about the ecology, geology, and anthropology of California. Likewise, the majority of her achievements protecting public lands and habitats are associated with her activities as a member of the Sierra Club (LAT 1995: 20; Sierra Club 1995). Therefore, the subject property cannot be associated with Bakker’s productive life.

Due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under NRHP/CRHR Criteria B/2.

Criterion C/3: Design/Construction
Under NRHP Criterion C and CRHR Criterion 3, the Earthside Nature Center site does not fully embody the distinctive characteristics of a community garden from 1971. Due to substantial alterations, the site contains few remains of the original facility. Only the wood post entrance from 1971 and a plaque from 1992 are known to be original to the site.

The remaining original trees appear to be in poor condition, and many of the original plantings have been replaced by weeds and shrubs. There is also no indication that any of these resources are the work of a master or possess high artistic value. Likewise, the resource is not part of a potential or existing historic district. As such, the Earthside Nature Center site lacks sufficient design and construction value to meet NRHP/CRHRCriteria C/3.

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

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Criterion D/4: Data Potential
Under NRHP Criterion D and CRHR Criterion 4, the subject property is not significant as a source, or likely source, of important historical information, nor does it appear likely to yield important information about historic construction methods, materials, or technologies. The original site of the Earthside Nature Center has been significantly disturbed since 1971 when it was established. After its closure in 1995, the property was abandoned and became overgrown with weeds and shrubs. Likewise, many of the original features were removed at unknown dates. The site is unlikely to contain any data that would answer specific research questions due to disturbance and substantial alterations. As such, the subject property lacks significance under NRHP/CRHR D/4.

City of Pasadena Landmark Criteria
The Earthside Nature Center also does not appear to meet any of the City of Pasadena’s historic resources designation criteria to be considered a landmark as outlined under Section 17.62.040(D)(2) of the Pasadena Code of Ordinances.

Criterion A: Events
Under the City of Pasadena Landmark Criterion A, the Earthside Nature Center is not associated with any events that have made a significant contribution to the broad patterns of the history of the City. As discussed in NRHP/CRHR Criteria A/1, research does not indicate that the subject property was associated with significant events, therefore, it is not recommended eligible for City of Pasadena Landmark Criterion A.

Criterion B: Significant Persons
Under the City of Pasadena Landmark Criterion B, the Earthside Nature Center is not associated with the lives of persons who are significant in the history of the City. As discussed in NRHP/CRHR Criteria B/2, due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under City of Pasadena Landmark Criterion B.

Criterion C: Design/Construction
Under the City of Pasadena Landmark Criterion C, the Earthside Nature Center is not a particularly distinctive example of a type, style, period, or method of construction, nor does it represent the work of an architect, designer, engineer, or builder whose work is of significance to the City, or possess artistic values of significance to the City. As discussed in NRHP/CRHR Criterion C/3, the subject property has been substantially altered and contains few remains of the original facility. Therefore, it is recommended not eligible under City of Pasadena Landmark Criterion C.

Criterion D/4: Data Potential
Under the City of Pasadena Landmark Criterion D, the Earthside Nature Center has not yielded, and is not likely to yield, information important locally in prehistory or history. As discussed in NRHP/CRHR Criterion D/4, the subject property lacks significance under City of Pasadena Landmark Criterion D.

Statement of Integrity and Conclusion
Because the Earthside Nature Center site lacks the necessary significance to meet any of the NRHP or CRHR listing criteria, or the City of Pasadena landmark designation criteria, an analysis of the structure’s physical integrity was considered unwarranted and immaterial to the overall finding that the subject property is not eligible for listing in the NRHP, CRHR, or the City of Pasadena Historic Resources Database. As such, this evaluation concludes that the subject property is not considered a historic property under Section 106 of the NHPA because it does not meet any of the NRHP evaluation criteria as described under 36 CFR § 60.4. Additionally, the subject property is not considered a historical resource for the purposes of CEQA as defined under 14 CCR § 15064.5(a).

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

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*B12. References (continued from page 2):

AHS (American Horticultural Society). 2025. “Great American Gardeners Awards History.” American Horticultural Society (Alexandria, VA). Accessed September 2025. https://ahsgardening.org/great -american-gardeners-awards- history/.

Barber, Mary. 1985. “Dump Goes Back to Nature: A Treasure Trove of Flora in Pasadena.” Los Angeles Times (Los Angeles, CA). April 7, 1985. https://www.latimes.com/archives/la-xpm-1985-04-07-ga-27809-story.html.

City of Pasadena. 2025. “Heritage: A Short History of Pasadena.” City of Pasadena (Pasadena, CA). Accessed July 17, 2025. https://www.cityofpasadena.net/about-pasadena/history-of-pasadena/.

Coppess, Michael. 2008. “Secret Garden.” East of Allen. December 13, 2008. https://eastofallen.com/2008/12/13/secret-garden/.

Data USA. 2025. “Pasadena, CA.” Data USA. Accessed July 17, 2025. https://datausa.io/profile/geo/pasadena - ca/#economy.

Gilmore, Ryan, Leandra Golden, Hyon Chu Tsang, and Jackie Vandenburgh. 2009. Earthside Nature Center Green Vision. Prepared for the California State Polytechnic University, Pomona (Pomona, CA). 2009. Accessed July 24, 2025.

HRG (Historic Resources Group) and Teresa Grimes Historic Preservation. 2025. City of Pasadena Public Review Draft Historic Statement. Prepared for the City of Pasadena Planning and Community Development Department of the Planning Division. Historic Resources Group (Pasadena, CA). April 2025. https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/Pasadena-Historic-Context- Statement-All-Chapters-April-2025.pdf?v=1752790006363.

NETR (Nationwide Environmental Title Research). 2025. Historical Aerial Photographs of the City of Pasadena, CA dating from 1948,1952, 1953, 1964, 1972, 1977, 1978, 1980, 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2004, 2005, 2 009, 2010, 2012, 2014, 2016, 2018, 2020, and 2022.

Accessed July 2025. https://www.historicaerials.com/viewer.

O’Connor, Pamela. 1993. Architectural/Historical Development of the City of Pasadena – Historic Context/Property Type Report. Submitted to the California State Office of Historic Preservation. Urban Conservation Section of the City of Pasadena Planning Division (Pasadena, CA). January 13, 1993.

LAT (Los Angeles Times). 1987. “Earthside Nature Center Offers Annual Wildflower Walkabouts.” Newspapers.com: Los Angeles Times (Los Angeles, CA). April 11, 1987. Page 76. Newspapers.com.

LAT. 1995. “Elna Bakker; Author and Environmentalist.” Newspapers.com: Los Angeles Times (Los Angeles, CA). July 8, 1995. Page 20. Newspapers.com.

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*Pfa. Photographs (continued from page 1):

Photograph 2. View of the plaque at the Earthside Nature Center site, looking south. Photograph taken on June 26, 2025.

Source: Dudek, IMG_4126.

Photograph 3. View of the Earthside Nature Center site, looking southeast. Photograph taken on June 26, 2025.

Source: Dudek, IMG_4176.

*P11. Report Citation: (Cite survey report and other sources, or enter "none.") Dudek. 2025. Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project. Prepared for the City of Pasadena. *Attachments: ☐ NONE ☒Location Map ☒Continuation Sheet ☒Building, Structure, and Object Record ☐Archaeological Record ☐District Record ☐Linear Feature Record ☐Milling Station Record ☐Rock Art Record ☐Artifact Record ☐Photograph Record ☐Sketch Map ☐Other (List):

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PRIMARY RECORD Trinomial
NRHP Status Code 6Z
Other Listings
Review Code Reviewer Date
P1. Other Identifier: Girls Club of Pasadena; Pasadena Urgent Care Center, Map ID 4 *P2. Location: ☐ Not for Publication ☒ Unrestricted *a. County Los Angeles and (P2c, P2e, and P2b or P2d. Attach a Location Map as necessary.) *b. USGS 7.5' Quad Pasadena, Calif. Date 1999 T 12W; R; ¼ of ¼ of Sec 38; San Bernardino B.M. c. Address 3160 East Del Mar Boulevard City Pasadena Zip 91107 d. UTM: (Give more than one for large and/or linear resources) Zone 11, 399895 mE/ 3778400 mN e. Other Locational Data: (e.g., parcel #, directions to resource, elevation, decimal degrees, etc., as appropriate) APN 5754-030-901

*P3a. Description: (Describe resource and its major elements. Include design, materials, condition, alterations, size, setting, and boundaries)
The property at 3160 East Del Mar Boulevard (APN 5754-030-901) contains an urgent care building surrounded by an asphalt- paved parking lot (Photograph 1). Access to the property is provided by two concrete driveways on the south side of Del Mar Boulevard. The urgent care building is irregular in plan and one-story in height. The building is clad with wood clapboard siding and topped by a metal-batten cross-gable roof with overhanging closed eaves with exposed rafters. A covered main entrance beneath the ext ending roof overhang on the primary (north) elevation contains two sets of metal -frame fully glazed doors (Photograph #). Secondary access is provided by metal doors on the northeast corner of the primary elevation and the west and east elevations (Photographs 2 & 3). See Continuation Sheet. *P3b. Resource Attributes: HP14. Government Building
*P4. Resources Present: ☒ Building ☐ Structure ☐ Object ☐ Site ☐ District ☐ Element of District ☐ Other (Isolates, etc.) P5b. Description of Photo: Photo 1,
IMG_1138, looking southwest,
6/26/2025.

*P6. Date Constructed/Age and
Sources:  Historic
c. 1955 (LAT 1959: 238)

*P7. Owner and Address:

City of Pasadena
100 N. Garfield Avenue
Pasadena, California 91101

*P8. Recorded by:

Katie Ahmanson, MHC
Dudek
225 S. Lake Ave, Ste. M210
Pasadena, CA 91101

*P9. Date Recorded:

June 26, 2025

*P10. Survey Type: Intensive

P5a. Photograph

*Resource Name or # Exer Urgent Care

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BUILDING, STRUCTURE, AND OBJECT RECORD
B1. Historic Name: Girls Club of Pasadena
B2. Common Name: Exer Urgent Care
B3. Original Use: Community Center
B4. Present Use: Urgent Care Center
*B5. Architectural Style: Modern with International style elements *B6. Construction History: (Construction date, alterations, and date of alterations) Known alterations to the building include the expansion of the building in 1961 and additions to the primary and rear (south) elevation of the building c. 2018 (LAT 1961b: 349; NETR 2025).
*B7. Moved? ☒No ☐ Yes ☐ Unknown Date: Original Location:
*B8. Related Features: Surrounding parking lot
B9a. Architect: Unknown b. Builder: Unknown *B10. Significance: Theme N/A Area: N/A Period of Significance N/A Property Type N/A Applicable Criteria N/A (Discuss importance in terms of historical or architectural context as defined by theme, period, and geographic scope. Also address integrity.)

Exer Urgent Care not meet the criteria for listing in the National Register of Historic Places (NRHP), California Register of Historical Resources (CRHR), or the City of Pasadena Historic Resources Database. The property was evaluated in accordance with Section 106 of the National Historic Preservation Act (Section 106) and Section 15064.5 (a)(2)-(3) of the CEQA Guidelines using the criteria outlined in Section 5024.1 of the California Public Resources Code. The property is not considered a historic property for the purposes of Section 106 or a historical resource under CEQA. As such, this evaluation assigns a 6Z California Historical Resources Status Code to Exter Urgent Care. See Continuation Sheet/

B11. Additional Resource Attributes: None

*B12. References: See Continuation Sheet.

B13. Remarks: None

*B14. Evaluator: Katie Ahmanson, MHC, Dudek

*Date of Evaluation: September 5, 2025

(This space reserved for official comments.)

(Sketch Map with north arrow required.)

e ~ 01Aete!s Feet _____ ,. C ~~:-~~;er urgent Care (3160East0e l Mar Boolevard; APN

*Map Name: Pasadena, Calif. *Scale: 1:24,000 *Date of map: 1999 DPR 523J * Required information
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0 260 520
---~="'-~= Meters
c::::J Map ID 4: Exler Urgent Care (3160 East Del Mar Boulevard; APN 5754-030-901)

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*P3a. Description (continued from page 1)
Fenestration consists of grouped metal-sash awning windows with brise soleil. Only the primary elevation and partial views of the east and west elevations were visible during the property survey. A concrete masonry unit wall encases the northern boundary of the property, and metal-rail fencing surrounds the east, south, and west boundaries. Landscaping includes small plantings, trees, and shrubs. Alterations include the expansion of the building in 1961 and additions to the primary and rear (south) elevation of the building c. 2018. Due to substantial alterations, the building no longer represents distinctive characteristics of an architectural style or period. It contains elements of Modern utilitarian design, including minimal exterior ornamentation, grouped metal-sash awning windows with brise soleil, a metal-batten cross-gable roof, wood-clapboard siding, and a concrete slab foundation. *B10. Significance (continued from page 2):

The following historic context is adapted from Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project, prepared in October 2025 by Dudek.

Historical Overview of the City of Pasadena
The City of Pasadena was established in 1886 when it was incorporated into Los Angeles County. Initially, the area was inhabited by the Hahamogna people, who dominated the area until the arrival of the Spanish. During the Spanish period in the 1770s, the area was part of the lands under the jurisdiction of the San Gabriel MissionMembers of the local tribes were forced to build the mission structure and work on the ranch to cultivate crops. After Mexico won its independence from Spain in 1822, Alta California bec ame part of the Mexican Republic, and the Mexican government opened California to foreign trade. The area comprising present-day Pasadena became part of Rancho el Rincon de San Pascual in 1926, before it was acquired by Jose Perez and Enrique Sepulveda in the 1840s. Perez and Sepulveda subdivided a portion of the land for the development of the several single-family residences, and in 1843 Manual Garfias purchased part of the rancho in 1843 to construct a hacienda. By 1848, the United States had assumed formal control of California with the Treaty of Guadalupe-Hidalgo and introduced Anglo culture and society. Garfias continued to own the ranch until the 1860s, when he sold the property to Dr. John S. Griffin and Benjamin Davis Wilson who subdivided the land and sold off portions. Development in Pasadena continued during the 1860s, and by 1873, Griffin and Wilson divided and developed the last four separate tracts of their land (HRG 2025: 31; O’Connor 1993: 7-10).

The City of Pasadena was incorporated in 1886 during a period of agricultural growth. The fertile soil in the area lent itself to a successful local citrus industry that encouraged settlers to move to the area. Additionally, the completion of the transcontinental railroad in 1869 aided in the growth of the area as well as the transportation of local produce. The citrus industry continued to dominate the City’s economy throughout the early twentieth century, followed by the cultivation of wheat and barley. Development of early homes reflected the City’s humble beginnings with simple one and two-story wood-frame vernacular farmhouses that were later replaced with more substantial masonry buildings.

Infrastructure such as sewers, paved streets, and electrical street lighting were installed during 1880s and 1890s (O’Connor 1993: 12-19; City of Pasadena 2025).

By the turn of the century, Pasadena’s economy began to shift to a tourist-based economy due to its picturesque location in the foothills of the San Gabriel Mountains. Early hotels were modest in scale and primarily promoted to tuberculosis patients who traveled to the area to benefit from its temperate climate , known to have a positive effect on health.

Pasadena’s prominence as a tourist destination began when the Pasadena Board of Trade formed in 1888 and began to “promote and encourage everything that wi ll make our beloved city more beautiful, more healthful morally and physically” (O’Connor 1993: 17). The board published Pasadena: Crown of the Valley in 1892 to promote the many recreational opportunities to tourists and residents in hopes of stimulating tourism. The San Gabirel Mountains offered visitors various recreational activities including picnicking, horseback riding, hiking, hunting, and fishing. Developed of grand hotels such as the Hotel Green, in 1894, the Raymond Hotel in 1901, and the Hotel Maryland in 1903, led to a wave of tourists enamored by the local climate and amenities (O’Connor 1993: 17-20).

During the 1910s and 1920s, tourists began to purchase land and construct vacation homes for their winter stays.

Mansions replaced many of the early modest residences associated with the agricultural industry, and the street Orange Grove, named after its vicinity to local citrus orchards, became known as “Millionaires’ Row”. As Pasadena developed

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into a modern city, it enticed middle and working-class residents who supported the construction industry with laborers, brick makers, and hospitality workers at the hotels. Residential development patterns at this time reflected socio - economic and racial boundaries. The southwest portion of the city consisted of wealthy, primarily white residents, while middle-class residents occupied the areas north and east of the city center (O’Connor 1993: 20-21).

The Great Depression (1929–1939) impacted industries and communities throughout the city, especially working-class jobs such as domestic workers and retail clerks. Although the population of Pasadena reached 76,000 residents by 1930, the city’s industrial base decreased from 191 companies in 1920 to 150 companies in 1930. Many of the large hotels that struggled at this time resulted in the demolition of some, like the Hotel Maryland in 1935, and the conversion of others for different uses (O’Connor 1993: 21-22). Additionally, many of the mansions along Millionaires’ Row were abandoned or converted into boarding houses, leading to the area being rezoned for multi-family development in 1948.

Wartime employment during the onset of World War II in 1941 saw a small increase in the population as servicemen passed through Los Angeles on their way to and from the war. However, development largely slowed during the beginning of the war (O’Connor 1993: 33).

After World War II, a massive wave of migration and building boom occurred throughout California. Pasadena experienced a population increase of over 22,000 residents between 1940 and 1950 with new residential tracts developed in the Allendale, Upper Hastings, Kinneloa, San Rafael, and Linda Vista neighborhoods of the city. With the advent of the state and federal highway systems during the 1950s and 1960s, automobiles allowed travelers to take themselves to places that were only previously accessible by railroads. The highway system encouraged tourism that propelled the city’s economy and spurred growth in the surrounding areas. This growth is reflected in the city’s present- day built environment that includes residential development along public transportat ion lines and commercial development along major commercial routes. Residential partitioning enforced zoning ordinances with specific building standards and lot controls characterized by concentrations of single-family residences with distinctive planning features such as street alignments, setbacks, curbs, sidewalks, and landscaping (O’Connor 1993: 33 -43). Historical aerial photographs show that Pasadena was primarily developed by the 1980s (NETR 2025). In recent years, the economy has shifted to support a variety of industries including health care and social assistance, professional, scientific, and technical services, and educational services. As of 2023, the population in Pasadena included over 136,000 residents (Data USA 2025).

Development of Exter Urgent Care
The Exer Urgent Care building at 3160 East Del Mar Boulevard (APN 5754 -030-901) was initially developed as a clubhouse for the Girls Club of Pasadena c. 1955 by the City of Pasadena (LAT 1959: 238; ParcelQuest 2025). The clubhouse was expanded in 1961 to include a patio area, a library, three additional craft rooms, and a teen room (LAT 1961b: 349). Activities, events, and training sessions were hosted at the clubhouse from the 1950s to the 1990s (LAT 1959: 238; LAT 1964: 13; LAT 1970: 473; LAT 1980: 514; LAT 1990: 212). Research indicates that the building was owned by the City of Pasadena and operated by the Pasadena Girls Club until 2009, when it was converted to the Pasadena Urgent Care Center (Google Maps 2025). A study by Huntington Hospital in 2006 de termined the community’s need for more healthcare in the growing underserved areas of Pasadena and proposed the construction of a new urgent care center. Two city-owned properties were suggested at 3160 East Del Mar Boulevard (the subject property) and the former St. Luke Hospital facility at 2690 East Washington Boulevard. The study concluded that the northwest portion of the city had the greatest need for an urgent care center, so the East Del Mar Boulevard property was chosen for the development of the Pasadena Urgent Care Center in 2009 (HH 2006). Historic aerial photographs show that additions were added to the primary (north) and rear (south) elevations of the building to accommodate the urgent care in 2009 (NETR 2025). By 2019, the building was occupied by Exer Urgent Care, which has remained at the property to the present under the ownership of the City of Pasadena (Google Maps 2025; ParcelQuest 2025).

Urgent Care Center Typology
Although urgent care centers first emerged in the 1970s, it was decades before they were integrated with the broader national healthcare system. Growth in the development of urgent care centers during the last two decades has been a result of consumer demand for convenient healthcare and a lack of access to primary care. The number of urgent care centers in the United States almost doubled between 2014 and 2023, from 7,220 centers to 14,382. The development

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

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of urgent care centers varies by state, depending on the per capita concentration of an area. During the COVID -19 pandemic from 2020 to 2023, consumers disregarded initial guidance from regulators advising patients not to pursue COVID-19 testing at urgent care centers, leading to an exponential increase in urgent care visits. Continued growth of urgent care centers resulting in further development of centers in the 2020s (Trilliant Health 2024). More recent urgent care centers adapt existing buildings such as strip malls, office buildings, or existing medical facilities for efficient development. Centers must meet local health department regulations and comply with the Stark Laws’ provisions against special favors, special compensation, or givebacks to doctors, particularly if a building is leased space from a hospital (Manley 2013). The Cedars-Sinai Urgent Care building in Culver City was completed in 2015 by Abramson Architects and won the 2015 AIA-San Fernando Valley Design Award as well as recognition from Healthcare Design's 2015 Remodel/Renovation Competition. Additionally, the Cedars-Sinai Los Feliz Urgent Care & OB/GYN, designed by Abramson Architects, won both the 2022 AIA LA Design Award and the 2022 SCDF Design Award. Both designs were noted for their use of floor-to-ceiling windows to provide light and space within the interiors (AA 2025a; AA 2025b).

Characteristics of the department store typology (Manley 2013):
• High visibility
• Ease of access
• Parking lot
• Exterior signage
• Building lobby

NRHP/CRHR Criteria
3160 East Del Mar Boulevard was evaluated in consideration of the NRHP or CRHR criteria and integrity requirements.

As a result of the evaluation, 3160 East Del Mar Boulevard is recommended not eligible for inclusion in the NRHP or CRHR due to a lack of significant associations.

Criterion A/1: Events
Under NRHP Criterion A and CRHR Criterion 1, the building at 3160 East Del Mar Boulevard lacks a direct and important association with any event significant in local, state, or national history. The building at 3160 East Del Mar Boulevard was constructed by the City of Pasadena for the Girls Club of Pasadena c. 1955 during the post -war population and development boom. It was occupied by the Girls Club of Pasadena from c. 1955 to 2009, when it was converted to an urgent care center. While civic properties such as the subject property were developed in residential neighborhoods throughout Pasadena in the post-war period to accommodate the recreational needs of fast fast-growing city, there is no indication that the subject property is particularly significant within this pattern of development, either regionally or nationwide. Likewise, the building was heavily altered and converted to an urgent care center in 2009, and no longer bears an association with the Girls Club of Pasadena. As an urgent care center, the subject property is not the first or the last facility developed in Pasadena. The subject property represents the continuation of a decades-long period of civic development after the conclusion of World War II. However, mere association with a broad trend is insufficient to meet NRHP Criterion A or CRHR Criterion 1. The property must also have an important association with a historic trend or event. In the specific case of the building at 3160 East Del Mar Boulevard, it is not known to be directly associated with any events that have made a significant contribution to the history of Pasadena, California, or the nation. Therefore, the subject property is not eligible under NRHP/CRHR Criteria A/1.

Criterion B/2: Significant Persons
Under NRHP Criterion B and CRHR Criterion 2, the residence at 3160 East Del Mar Boulevard lacks a significant association with the productive life of any person important in local, state, or national history. Research indicates that the City of Pasadena has owned the property from c. 1955 to the present and that it has been occupied by three organizations in that time. The Girls Club of Pasadena occupied the property from c. 1955 to 2009, the Pasadena Urgent Care Center from 2009 to c. 2019, and Exer Urgent Care from c. 2019 to the present. Research did not uncover information that indicated that these occupants made a significant contribution to history. Due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under NRHP/CRHR Criteria B/2.

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

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Criterion C/3: Design/Construction
Under NRHP Criterion C and CRHR Criterion 3, the urgent care building at 3160 East Del Mar Boulevard is not significant because it does not represent an important example of a type, period, or method of construction. Research did not identify an architect or builder for the property, and it appears unlikely to be the work of a master architect or builder.

Although the subject property lacks a formal discernible architectural style, it does reflect elements of Modern utilitarian design, including minimal exterior ornamentation, grouped metal-sash awning windows with brise soleil, a metal-batten cross-gable roof, wood-clapboard siding, and a concrete slab foundation. The subject property is a heavily altered example of a modest and undistinguished building converted to an urgent care center in 2009, which is a ubiquitous property type found throughout the region. The subject property appears to have been constructed using well- documented and common construction techniques and methods. Additionally, as a purpose-built building, it does not possess high artistic values and is not the product of an architect or builder attempting to articulate the design principles or aesthetics of a formal architectural style or substyle. The property is also not a rare example of its type; there are similar urgent care facilities from throughout the city, state, and nation. The last portion of NRHP Criterion C refers to a district, which is defined as a significant and distinguishable entity whose components may lack individual distinction.

The subject property does not contribute to the significance of a potential or existing historic district. Overall, the subject property lacks sufficient design and construction value to meet NRHP/CRHR Criteria C/3.

Criterion D/4: Data Potential
Under NRHP Criterion D and CRHR Criterion 4, the subject property is not significant as a source, or likely source, of important historical information, nor does it appear likely to yield important information about historic construction methods, materials, or technologies. This technology is well understood through contemporary trade journals and scientific monographs. As such, the subject property lacks significance under NRHP/CRHR Criteria D/4.

City of Pasadena Landmark Criteria
The building at 3160 East Del Mar Boulevard also does not appear to meet any of the City of Pasadena’s historic resources designation criteria to be considered a landmark as outlined under Section 17.62.040(D)(2) of the Pasadena Code of Ordinances.

Criterion A: Events
Under the City of Pasadena Landmark Criterion A, the building at 3160 East Del Mar Boulevard is not associated with any events that have made a significant contribution to the broad patterns of the history of the City. As discussed in NRHP/CRHR Criteria A/1, research does not indicate that the subject property was associated with significant events, therefore, it is not recommended eligible for City of Pasadena Landmark Criterion A.

Criterion B: Significant Persons
Under the City of Pasadena Landmark Criterion B, the building at 3160 East Del Mar Boulevard is not associated with the lives of persons who are significant in the history of the City. As discussed in NRHP/CRHR Criteria B/2, due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under City of Pasadena Landmark Criterion B.

Criterion C: Design/Construction
Under the City of Pasadena Landmark Criterion C, the building at 3160 East Del Mar Boulevard is not a particularly distinctive example of a type, style, period, or method of construction, nor does it represent the work of an architect, designer, engineer, or builder whose work is of significance to the City, or possess artistic values of significance to the City. As discussed in NRHP/CRHR Criterion C/3, the subject property is a heavily altered example of a modest and undistinguished building, and therefore, is recommended not eligible under City of Pasadena Landmark Criterion C.

Criterion D/4: Data Potential
Under the City of Pasadena Landmark Criterion D, the building at 3160 East Del Mar Boulevard has not yielded, and is not likely to yield, information important locally in prehistory or history. As discussed in NRHP/CRHR Criterion D/4, the subject property lacks significance under City of Pasadena Landmark Criterion D.

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

DPR 523L * Required information
State of California - The Resources Agency Primary#
DEPARTMENT OF PARKS AND RECREATION HRI #
CONTINUATION SHEET Trinomial
Statement of Integrity and Conclusion
Because Exer Urgent Care lacks the necessary significance to meet any of the NRHP or CRHR listing criteria, or the City of Pasadena landmark designation criteria, an analysis of the structure’s physical integrity was considered unwarranted and immaterial to the overall finding that the subject property is not eligible for listing in the NRHP, CRHR, or the City of Pasadena Historic Resources Database. As such, this evaluation concludes that the subject property is not considered a historic property under Section 106 of the NHPA because it does not meet any of the NRHP evaluation criteria as described under 36 CFR § 60.4. Additionally, the subject property is not considered a historical resource for the purposes of CEQA as defined under 14 CCR § 15064.5(a).

*B12. References (continued from page 2):

AA (Abramson Architects). 2025a. “Cedars-Sinai Urgent Care | Award Winner.” Abramson Architects (Los Angeles, CA).

Accessed August 5, 2025. https://www.abramsonarchitects.com/work/cedars-sinai-urgent-care.

AA. 2025b. “Cedars-Sinai Los Feliz Urgent Care & OB/GYN | Award Winner.” Abramson Architects (Los Angeles, CA).

Accessed August 5, 2025. https://www.abramsonarchitects.com/work/cedars-sinai-los-feliz-urgent-care-ob- gyn#:~:text=Abramson%20Architects%20%7C%20Cedars%2DSinai%20Los,//%202022%20SCDF%20Desig n%20Award.

City of Pasadena. 2025. “Heritage: A Short History of Pasadena.” City of Pasadena (Pasadena, CA). Accessed July 17, 2025. https://www.cityofpasadena.net/about-pasadena/history-of-pasadena/.

Data USA. 2025. “Pasadena, CA.” Data USA. Accessed July 17, 2025. https://datausa.io/profile/geo/pasadena - ca/#economy.

Google Earth. 2025. Google Earth, desktop application; centered on the review area. Accessed March 2025. https://www.google.com/earth/.

HRG (Historic Resources Group) and Teresa Grimes Historic Preservation. 2025. City of Pasadena Public Review Draft Historic Statement. Prepared for the City of Pasadena Planning and Community Development Department of the Planning Division. Historic Resources Group (Pasadena, CA). April 2025. https://www.cityofpasadena.net/planning/wp-content/uploads/sites/30/Pasadena-Historic-Context- Statement-All-Chapters-April-2025.pdf?v=1752790006363.

HH (Huntington Hospital). 2006. Urgent Care Center Assessment. Huntington Hospital (Pasadena, CA). May 5, 2006. https://ww2.cityofpasadena.net/2008%20agendas/Sep_08_08/11A%20URGENT%20CARE%20CENTER%2 0ASSESSMENT.pdf.

Manley, Marisa. 2013. “How to Successfully Build Out an Urgent Care Center.” The Journal of Urgent Care Medicine (Carefree, AZ). June 1, 2013. https://www.jucm.coTm/how-to-successfully-build-out-an-urgent-care-center/.

NETR (Nationwide Environmental Title Research). 2025. Historical Aerial Photographs of the City of Pasadena, CA dating from 1948,1952, 1953, 1964, 1972, 1977, 1978, 1980, 1987, 1988, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002, 2004, 2005, 2 009, 2010, 2012, 2014, 2016, 2018, 2020, and 2022.

Accessed July 2025. https://www.historicaerials.com/viewer.

O’Connor, Pamela. 1993. Architectural/Historical Development of the City of Pasadena – Historic Context/Property Type Report. Submitted to the California State Office of Historic Preservation. Urban Conservation Section of the City of Pasadena Planning Division (Pasadena, CA). January 13, 1993.

ParcelQuest. 2025. Assessor data for the subject property ay APN 5754 -030-901 in Los Angeles County. Accessed August 6, 2025. https://pqweb.parcelquest.com/#home.

LAT (Los Angeles Times). 1959. “Pasadena Girls Club to Fete Anniversary.” Newspapers.com: Los Angeles Times (Los Angeles, CA). May 10, 1959. Page 238. Newspapers.com.

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update

DPR 523L * Required information
State of California - The Resources Agency Primary#
DEPARTMENT OF PARKS AND RECREATION HRI #
CONTINUATION SHEET Trinomial
LAT. 1961b. “Two Honored for Aid Given to Girls’ Club.” Newspapers.com: Los Angeles Times (Los Angeles, CA). April 9, 1961. Page 349. Newspapers.com.

LAT. 1964. “Girls’ Club Will Offer 5 Classes.” Newspapers.com: Los Angeles Times (Los Angeles, CA). September 11, 1964. Page 13. Newspapers.com.

LAT. 1970. “Girls’ Club Sets Signup.” Newspapers.com: Los Angeles Times (Los Angeles, CA). June 21, 1970. Page 473.

Newspapers.com.

LAT. 1980. “Legislation Workshop.” Newspapers.com: Los Angeles Times (Los Angeles, CA). May 25, 1980. Page 514.

Newspapers.com.

LAT. 1990. “Girls’ Club of Pasadena Provides Day Care.” Newspapers.com: Los Angeles Times (Los Angeles, CA). May 23, 1990. Page 212. Newspapers.com.

Trilliant Health. 2024. “The Marked Shift in Urgent Care Utilization: Two Years Later.” Trilliant Health (Brentwood, TN).

May 12, 2024. https://www.trillianthealth.com/market -research/studies/the-marked-shift-in-urgent-care- utilization-two-years-later.
*Pfa. Photographs (continued from page 1):

Photograph 2. Primary (north) elevation of 3160 East Del Mar Boulevard, looking south. Photograph taken on June 26, 2025.

Source: Dudek, IMG_1142.

*Recorded by: Katie Ahmanson, MHC, Dudek *Date: September 5, 2025 ☒ Continuation ☐ Update DPR 523L * Required information
State of California - The Resources Agency Primary#
DEPARTMENT OF PARKS AND RECREATION HRI #
CONTINUATION SHEET Trinomial
Photograph 3. East elevation of 3160 East Del Mar Boulevard, looking southwest. Photograph taken on June 26, 2025.

Source: Dudek, IMG_1140.

Photograph 3. The primary and west elevations of 3160 East Del Mar Boulevard, looking southeast. Photograph taken on June 26, 2025.

Source: Dudek, IMG_1128.

 Continuation X Update
DPR 523L (1/95) *Required Information
State of California – The Resources Agency Primary # P-19-190502 DEPARTMENT OF PARKS AND RECREATION HRI #
UPDATE SHEET Trinomial
NRHP Status Code(s) 6z
P1. Other Identifier: Map ID 5
e. Other Locational Data: Assessor Parcel Number: 5754-030-802 *P3a. Description : The Southern California Edison ( SCE) 220kV and 66kV Mesa- Anita-Eaton Transmission Lines and two transmission line towers in the APE were surveyed from the public right -of-way (Photograph 1). The two 40- foot-tall metal lattice-frame towers are topped with conductors and long cross arms with porcelain insulators that hold the transmission wires. The lines span approximately 370 feet on the east side of the Eaton Wash Channel (Photograph 2). The lines, poles, and conductors have likely been replaced. Overall, these components currently appear to be in good condition. *P3b. Resource Attributes: HP11. Engineering Structure *P8. Recorded by: Katie Ahmanson, MHC, Dudek
*P11. Report Citation: Dudek. 2025. Cultural Resource Assessment Report for the Eaton Wash Stormwater Capture Project .

Prepared for the City of Pasadena.
*B10. Significance:

P-19-190502 was previously documented in 2010 by Wendy L. Tinsley Becker at Urbana Preservation & Planning LLC in the report, Southern California Edison Company’s Tehachapi Renewable Transmission Project Historic Infrastructure Eligibility Evaluation – Mesa-Anita Eaton Transmission Line, from 2010. The SCE Mesa-Anita-Eaton 66kV Transmission Line was recommended ineligible for inclusion in the National Register of Historic Places (NRHP) and California Register of Historic Resources (CRHR) and assigned a status code of 6z (found ineligible for NRHP, CRHR, or local designation through survey evaluation). Dudek agrees with the previous findings that the SCE Mesa-Anita-Eaton Transmission Line is recommended not eligible for inclusion in the NRHP, CRHR, or the City of Pasadena Historic Resources Database due to a lack of significant associations. As such, this evaluation concludes that the subject property is not considered a historic property under Section 106 of the NHPA because it does not meet any of the NRHP evaluation criteria as described under 36 CFR Section 60.4. Additionally, the subject property is not considered a historical resource for the purposes of CEQA as defined under 14 CCR Section 15064.5(a).

NRHP/CHRH Criteria
Criterion A/1: Events
Under NRHP Criterion A and CRHR Criterion 1 , the SCE Mesa -Anita-Eaton Transmission Line lacks a direct and important association with any event significant in local, state, or national history. The 66kV transmission line was installed in 1951 to distribute power from the SCE Mesa Substation, Anita Substation, and Eaton Substation during the post- war population and development boom. By 2005, the 220 kV transmission line was added. Both lines were constructed outside of the 1912-1941 period that the SCE Historic-Era Electrical Infrastructure Management Program identified as a significant period in the development of transmission line systems designed to transmit electrical power within the 67 kV to 230 kV range. Although the transmission lines are representative of the development of electrical power infrastructure in post-war Pasadena, they are not associated with any event(s) or period(s) important in SCE or electrical engineering history. Therefore, the subject property is not eligible under NRHP/CRHR Criterion A/1.

Criterion B/2: Significant Persons
Under NRHP Criterion B and CRHR Criterion 2 , the SCE Mesa-Anita-Eaton Transmission Line lacks a significant association with the productive life of any person important in local, state, or national history. Archival research indicates that the transmission line system is associated with the SCE Company. Although the power co mpany played an important role in the development of electrical infrastructure in Pasadena and Southern California, the transmission line segment represents the collective work of many individuals rather than the work of any single individual. Research did not uncover information that indicated that any individuals who made a singular and significant contribution to the development of electrical transmission

 Continuation X Update
DPR 523L (1/95) *Required Information
State of California – The Resources Agency Primary # P-19-190502 DEPARTMENT OF PARKS AND RECREATION HRI #
UPDATE SHEET Trinomial
NRHP Status Code(s) 6z
line systems are associated with the line. Due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under NRHP/CRHR Criterion B/2.

Criterion C/3: Design/Construction
Under NRHP Criterion C and CRHR Criterion 3, the SCE Mesa-Anita-Eaton Transmission Line is not significant because it does not represent an important example of a type, period, or method of construction. The transmission line is part of a linear transmission line system consisting of steel lattice towers, which are common support structures for transmission lines in Pasadena, Los Angeles County, and California. According to the SCE Historic -Era Electrical Infrastructure Management Program, “By 1930 SCE developed the backbone of their 66 kV system, by 1940 the backbone of their 220 kV system and by 1970 their 500 kV system” (Tinsley 2017: 86). Therefore, the 1951 66 kV subject system is representative of ubiquitous infrastructure that exemplifies a standardized transmission system consisting of steel lattice towers, transmission lines, and hardware, and it lacks innovation regarding its overall design, form, and function. Additionally, research did not indicate that the transmission line is associated with the work of a master engineer or builder, nor did it reveal that the subject line segment represents an important variation, evolution, or transition of transmission line development because they fall outside the 1912 to 1941 period of significance that SCE i dentified for this voltage class of transmission lines. Overall, the subject property lacks sufficient design and construction value to meet NRHP/CRHR Criterion C/3.

Criterion D/4: Data Potential
Under NRHP Criterion D and CRHR Criterion 4, the SCE Mesa-Anita-Eaton Transmission Line is not significant as a source, or likely source, of important historical information, nor does it appear likely to yield important information about historic construction methods, materials, or technologies. This technology is well understood through contemporary trade journals and scientific monographs. As such, the subject property lacks significance under NRHP/CRHR Criterion D/4.

City of Pasadena Landmark Criteria
Criterion A: Events
Under the City of Pasadena Landmark Criterion A, the SCE Mesa -Anita-Eaton Transmission Line is not associated with any events that have made a significant contribution to the broad patterns of the history of the City. As discussed in NRHP/CRHR Criterion A/1, research does not indicate that the subject property was associated wit h significant events, therefore, it is not recommended eligible for City of Pasadena Landmark Criterion A.

Criterion B: Significant Persons
Under the City of Pasadena Landmark Criterion B, the SCE Mesa-Anita-Eaton Transmission Line is not associated with the lives of persons who are significant in the history of the City. As discussed in NRHP/CRHR Criterion B/2, due to a lack of identified significant associations with any persons important in our past, the subject property is recommended not eligible under City of Pasadena Landmark Criterion B.

Criterion C: Design/Construction
Under the City of Pasadena Landmark Criterion C, the SCE Mesa-Anita-Eaton Transmission Line is not a particularly distinctive example of a type, style, period, or method of construction, nor does it represent the work of an architect, designer, engineer, or builder whose work is of significance to the City, or possess artistic values of significance to the City. As discussed in NRHP/CRHR Criterion C/3, the subject property is a common example of ubiquitous and undistinguished infrastructure, and therefore, is recommended not eligible under City of Pasadena Landmark Criterion C.

 Continuation X Update
DPR 523L (1/95) *Required Information
State of California – The Resources Agency Primary # P-19-190502 DEPARTMENT OF PARKS AND RECREATION HRI #
UPDATE SHEET Trinomial
NRHP Status Code(s) 6z
Criterion D: Data Potential
Under the City of Pasadena Landmark Criterion D, the SCE Mesa -Anita-Eaton Transmission Line has not yielded, and is not likely to yield, information important locally in prehistory or history. As discussed in NRHP/CRHR Criterion D/4, the subject property lacks significance under City of Pasadena Landmark Criterion D.

Statement of Integrity and Conclusion
Because the SCE Mesa -Anita-Eaton Transmission Line lacks the necessary significance to meet any of the NRHP or CRHR listing criteria, or the City of Pasadena landmark designation criteria, an analysis of the structure’s physical integrity wa s considered unwarranted and immaterial to the overall finding that the subject property is not eligible for listing in the NRHP, CRHR, or the City of Pasadena Historic Resources Database. As such, this evaluation concludes that the subject property is not considered a historic property under Section 106 of the NHPA because it does not meet any of the NRHP evaluation criteria as described under 36 CFR Section 60.4. Additionally, the subject property is not considered a historical resource for the purposes of CEQA as defined under 14 CCR Section 15064.5(a). *B14. Evaluator: Katie Ahmanson, MHC, Dudek
*Date of Evaluation: November 3, 2025
Photograph(s):

Photograph 1. The SCE Mesa-Anita-Eaton Transmission Line, looking south.

Source: Dudek, IMG_1135.

 Continuation X Update
DPR 523L (1/95) *Required Information
State of California – The Resources Agency Primary # P-19-190502 DEPARTMENT OF PARKS AND RECREATION HRI #
UPDATE SHEET Trinomial
NRHP Status Code(s) 6z
Photograph 2. The SCE Mesa-Anita-Eaton Transmission Line along the Eaton Wash Channel, looking northeast.

Source: Dudek, IMG_1116.

I ff
~/// ~ /
/ ~-/ •
/

Appendix F
Noise Modeling Inputs and Outputs

Field Noise Measurement Data
Record: 2073
Project Name Eaton craft water
Observer(s)
Date 2025-06-26

Meteorological Conditions
Temp (F) 73
Humidity % (R.H.) 61
Wind Calm
Wind Speed (MPH) 4
Wind Direction North
Sky Clear

Instrument and Calibrator Information
Instrument Name List (ENC) Rion NL-52
Instrument Name (ENC) Rion NL-52
Instrument Name Lookup Key (ENC) Rion NL-52
Manufacturer Rion
Model NL-52
Serial Number 553896
Calibrator Name (ENC) LD CAL150

Calibrator Name (ENC) LD CAL150
Calibrator Name Lookup Key (ENC) LD CAL150
Calibrator Manufacturer Larson Davis
Calibrator Model LD CAL150
Calibrator Serial # 5152
Pre-Test (dBA SPL) 93.8
Post-Test (dBA SPL) 94
Windscreen Yes
Weighting? A-WTD
Slow/Fast? Slow

Monitoring
Record # 1
Site ID ST2
Site Location Lat/Long 35.445908, -119.439361
Begin (Time) 09:51:00
End (Time) 10:06:00
Leq 46.6
Lmax 62.7
Lmin 41.5
Other Lx? L90, L50, L10
L90 43.2
L50 45.5

L10 48
Other Lx (Specify Metric) L
Primary Noise Source Traffic
Other Noise Sources (Background) Birds, Distant Gardener / Landscape Noise, Distant Traffic, Rustling Leaves Is the same instrument and calibrator being
used as previously noted?
Yes
Are the meteorological conditions the same as
previously noted?
Yes

Description / Photos

Site Photos
Photo
Comments / Description Facing southwest

Site Photos
Photo

Comments / Description Facing southeast

Site Photos
Photo
Comments / Description Facing northeast

Monitoring
Record # 2
Site ID ST1
Site Location Lat/Long 35.445908, -119.439361
Begin (Time) 10:16:00
End (Time) 10:31:00
Leq 49
Lmax 60.2
Lmin 43.2
Other Lx? L90, L50, L10
L90 45.2
L50 47.7
L10 51.3

FRMS FIELD DATA REPORT
Other Lx (Specify Metric) L
Primary Noise Source Playground
Other Noise Sources (Background) Birds, Distant Conversations / Yelling, Distant Dog Barking, Distant Gardener / Landscape Noise, Distant Kids Playing, Distant Traffic, Rustling Leaves
Is the same instrument and calibrator being
used as previously noted?
Yes
Are the meteorological conditions the same as
previously noted?
Yes

Description / Photos

Site Photos
Photo
Comments / Description Facing southeast

Site Photos
Photo

Comments / Description Facing east

Site Photos
Photo
Comments / Description Facing northwest

Monitoring
Record # 3
Site ID ST4
Site Location Lat/Long 35.445908, -119.439361
Begin (Time) 10:33:00
End (Time) 10:48:00
Leq 44.3
Lmax 50.8
Lmin 41.6
Other Lx? L90, L50, L10
L90 42.4
L50 43.6
L10 46.2

FRMS
'7?^FIELD DATA REPORT
Other Lx (Specify Metric) L
Primary Noise Source Traffic
Other Noise Sources (Background) Birds, Distant Conversations / Yelling, Distant Kids Playing, Distant Traffic, Rustling Leaves Is the same instrument and calibrator being
used as previously noted?
Yes
Are the meteorological conditions the same as
previously noted?
Yes

Description / Photos

Site Photos
Photo
Comments / Description Facing north

Site Photos
Photo
Comments / Description Facing east

Site Photos
Photo
Comments / Description Facing south

Monitoring
Record # 4
Site ID ST3
Site Location Lat/Long 35.445908, -119.439361
Begin (Time) 10:58:00
End (Time) 11:13:00
Leq 47.8
Lmax 58.7
Lmin 42.5
Other Lx? L90, L50, L10
L90 44.2
L50 46.2
L10 49.5
Other Lx (Specify Metric) L
Primary Noise Source Traffic

Other Noise Sources (Background) Birds, Distant Kids Playing, Distant Traffic, Rustling Leaves Is the same instrument and calibrator being
used as previously noted?
Yes
Are the meteorological conditions the same as
previously noted?
Yes

Description / Photos

Site Photos
Photo
Comments / Description Facing south

Site Photos
Photo
Comments / Description Facing west

Site Photos
Photo
Comments / Description Facing north

Construction Noise Modeling Data

Eaton Wash Stormwater Capture Project / Noise and Vibration Technical Analysis Appendix G -- Construction Noise Modeling Data Source to barrier distance 10 85
Receiver to barrier distance 90 8 0 = temporary barrier (TB) of input height inserted between source and receptor Receiver height 5
Construction Activity Equipment Total Equipment
Qty
Reference Level (Leq or
Lmax) @ 50 ft. from FHWA
RCNM 2 Table
Air Quality/Client Equipment
Description, Data Source and/or
Notes
Source to NSR
Distance (ft.)
Distance-
Adjusted Level
Allowable
Operation Time
(hours)
Allowable
Operation Time
(minutes)
Predicted 8-
hour Leq
Source
Elevation (ft)
Receiver
Elevation (ft)
Barrier
Height (ft)
Source to Barr.
("A") Horiz. (ft)
Rcvr. to Barr.
("B") Horiz. (ft)
Source to Rcvr.
("C") Horiz. (ft) "A" (ft) "B" (ft) "C" (ft) Path Length Diff. "P" (ft) Abarr (dB) Heff (with
barrier)
Heff (wout
barrier)
G (with
barrier)
G (without
barrier) ILbarr (dB) Notes
Demolition Dozer 2 80.0 Rubber Tired Dozers 100 71.7 8.00 480 75 5.3 5 0 10 90 100 11.3 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 1 71.2 Skid Steer Loaders 100 63.0 8.00 480 63 5.4 5 0 10 90 100 11.4 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Grader (passby) 2 78.5 Grader 100 70.5 8.00 480 73 6.0 5 0 10 90 100 11.7 90.1 100.0 0.00 0.1 5.5 5.5 0.7 0.7 0.1

77.3 Site Preparation, Clearing and Grubbing Dozer 3 80.0 Rubber Tired Dozers 100 71.7 8 480 77 5.3 5 0 10 90 100 11.3 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Power Tools - Jackhammer 1 91.0 Jack Hammer 100 68.1 8 480 68 1.0 5 4 3 97 100 4.2 97.0 100.1 1.17 13.7 7.0 3.0 0.6 0.7 13.6 Jackhammer used behind a plywood sheet (e.g., 4' x 8') Backhoe 4 75.8 Tractors/Loaders/Backhoes 100 67.4 8 480 73 4.5 5 0 10 90 100 11.0 90.1 100.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

78.6 Reservoir Excavation Dozer 2 80.0 Rubber Tired Dozers 100 71.7 8 480 75 5.3 5 0 10 90 100 11.3 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 100 63.0 8 480 66 5.4 5 0 10 90 100 11.4 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 3 75.8 Tractors/Loaders/Backhoes 100 67.4 8 480 72 4.5 5 0 10 90 100 11.0 90.1 100.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

77.0 Reservoir Construction Crane 1 74.2 Crane 100 66.6 8 480 67 7.7 5 0 10 90 100 12.6 90.1 100.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Dozer 2 80.0 Rubber Tired Dozers 100 71.7 8 480 75 5.3 5 0 10 90 100 11.3 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 100 63.0 8 480 66 5.4 5 0 10 90 100 11.4 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

75.8 Installation of Stormwater Drainage Infrastructure Crane 1 74.2 Crane 100 66.6 8 480 67 7.7 5 0 10 90 100 12.6 90.1 100.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Excavator 2 75.9 Trencher 100 67.9 8 480 71 6.2 5 0 10 90 100 11.8 90.1 100.0 0.00 0.1 5.6 5.6 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 100 63.0 8 480 66 5.4 5 0 10 90 100 11.4 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

73.2 Installation of Other Drainage Infrastructure Dozer 2 80.0 Rubber Tired Dozers 100 71.7 8 480 75 5.3 5 0 10 90 100 11.3 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 100 63.0 8 480 66 5.4 5 0 10 90 100 11.4 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 3 75.8 Tractors/Loaders/Backhoes 100 67.4 8 480 72 4.5 5 0 10 90 100 11.0 90.1 100.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

77.0 Pedestrian Bridge Construction Backhoe 3 75.8 Tractors/Loaders/Backhoes 100 67.4 8 480 72 4.5 5 0 10 90 100 11.0 90.1 100.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1 Crane 1 74.2 Crane 100 66.6 8 480 67 7.7 5 0 10 90 100 12.6 90.1 100.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1

73.2 Other Site Improvements Grader (passby) 1 78.5 Grader 100 70.5 8 480 70 6.0 5 0 10 90 100 11.7 90.1 100.0 0.00 0.1 5.5 5.5 0.7 0.7 0.1 Front End Loader (Passby) 1 71.2 Skid Steer Loaders 100 63.0 8 480 63 5.4 5 0 10 90 100 11.4 90.1 100.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Paving - Asphalt (Paver + Dump Truck) 1 81.8 Pavers 100 73.5 8 480 73 5.0 5 0 10 90 100 11.2 90.1 100.0 0.00 0.1 5.0 5.0 0.7 0.7 0.1 Paving - Concrete (Texturing/Curing Machine) 1 73.3 Paving Equipment 100 65.8 8 480 66 8.0 5 0 10 90 100 12.8 90.1 100.0 0.00 0.1 6.5 6.5 0.6 0.6 0.1 Compactor (Roller) 1 82.4 Rollers 100 73.9 8 480 74 4.4 5 0 10 90 100 10.9 90.1 100.0 0.00 0.1 4.7 4.7 0.7 0.7 0.1 Concrete Mixer Truck 1 81.1 Cement Mixer 100 72.8 8 480 73 5.0 5 0 10 90 100 11.2 90.1 100.0 0.00 0.1 5.0 5.0 0.7 0.7 0.1 Man Lift 1 72.1 Boom Lift 100 64.0 8 480 64 5.8 5 0 10 90 100 11.6 90.1 100.0 0.00 0.1 5.4 5.4 0.7 0.7 0.1

79.3 Total for Installation of Stormwater Drainage Infrastructure Phase:

Total for Installation of Other Drainage Infrastructure Phase:

Total for Pedestrian Bridge Construction Phase:

Total for Other Site Improvements Phase:
magnitude of threshold (dBA) per Pasadena MC Section 9.36.0800 = allowable hours over which Leq is to be averaged =
Total for Demolition Phase:

Total for Site Preparation, Clearing and Grubbing Phase:

Total for Reservoir Excavation Phase:

Total for Reservoir Construction Phase:

RCNM2-emulator_wschedule_edits102125 Dudek Project No. 16537 Pasadena_AllConcurrent Eaton Wash Stormwater Capture Project / Noise and Vibration Technical Analysis Appendix G -- Construction Noise Modeling Data Source to barrier distance Varies 75
Receiver to barrier distance Varies 1 0 = Del Mar Site Improvements -- temporary barrier (TB) of input height inserted between source and receptor Receiver height 5
Construction Activity Equipment Total Equipment
Qty
Reference Level (Leq or
Lmax) @ 50 ft. from FHWA
RCNM 2 Table
Air Quality/Client Equipment
Description, Data Source and/or
Notes
Source to NSR
Distance (ft.)
Distance-
Adjusted Level
Allowable
Operation Time
(hours)
Allowable
Operation Time
(minutes)
Predicted 1-
hour Leq
Source
Elevation (ft)
Receiver
Elevation (ft)
Barrier
Height (ft)
Source to Barr.
("A") Horiz. (ft)
Rcvr. to Barr.
("B") Horiz. (ft)
Source to Rcvr.
("C") Horiz. (ft) "A" (ft) "B" (ft) "C" (ft) Path Length Diff. "P" (ft) Abarr (dB) Heff (with
barrier)
Heff (wout
barrier)
G (with
barrier)
G (without
barrier) ILbarr (dB)
Demolition Dozer 2 80.0 Rubber Tired Dozers 230 62.6 1.00 60 66 5.3 5 0 10 220 230 11.3 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 1 71.2 Skid Steer Loaders 230 53.8 1.00 60 54 5.4 5 0 10 220 230 11.4 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Grader (passby) 2 78.5 Grader 230 61.2 1.00 60 64 6.0 5 0 10 220 230 11.7 220.1 230.0 0.00 0.1 5.5 5.5 0.7 0.7 0.1

68.1 Site Preparation, Clearing and Grubbing Dozer 3 80.0 Rubber Tired Dozers 230 62.6 1 60 67 5.3 5 0 10 220 230 11.3 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Power Tools - Jackhammer 0 91.0 Jack Hammer 230 73.2 1 60 0 1.0 5 0 10 220 230 10.0 220.1 230.0 0.00 0.1 3.0 3.0 0.7 0.7 0.1 Backhoe 4 75.8 Tractors/Loaders/Backhoes 230 58.3 1 60 64 4.5 5 0 10 220 230 11.0 220.1 230.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

69.1 Reservoir Excavation Dozer 2 80.0 Rubber Tired Dozers 280 60.6 1 60 64 5.3 5 0 10 270 280 11.3 270.0 280.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 280 51.9 1 60 55 5.4 5 0 10 270 280 11.4 270.0 280.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 3 75.8 Tractors/Loaders/Backhoes 280 56.4 1 60 61 4.5 5 0 10 270 280 11.0 270.0 280.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

65.9 Reservoir Construction Crane 1 74.2 Crane 625 47.1 1 60 47 7.7 5 0 10 615 625 12.6 615.0 625.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Dozer 2 80.0 Rubber Tired Dozers 625 52.8 1 60 56 5.3 5 0 10 615 625 11.3 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 625 44.1 1 60 47 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

56.9 Installation of Stormwater Drainage Infrastructure Crane 1 74.2 Crane 625 47.1 1 60 47 7.7 5 0 10 615 625 12.6 615.0 625.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Excavator 2 75.9 Trencher 625 48.8 1 60 52 6.2 5 0 10 615 625 11.8 615.0 625.0 0.00 0.1 5.6 5.6 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 625 44.1 1 60 47 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

54.0 Installation of Other Drainage Infrastructure Dozer 2 80.0 Rubber Tired Dozers 625 52.8 1 60 56 5.3 5 0 10 615 625 11.3 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 625 44.1 1 60 47 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 3 75.8 Tractors/Loaders/Backhoes 625 48.7 1 60 53 4.5 5 0 10 615 625 11.0 615.0 625.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

58.2 Pedestrian Bridge Construction Backhoe 3 75.8 Tractors/Loaders/Backhoes 670 48.0 1 60 53 4.5 5 0 10 660 670 11.0 660.0 670.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1 Crane 1 74.2 Crane 670 46.5 1 60 46 7.7 5 0 10 660 670 12.6 660.0 670.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1

53.7 Other Site Improvements Grader (passby) 1 78.5 Grader 50 78.4 1 60 78 6.0 5 0 10 40 50 11.7 40.3 50.0 0.00 0.1 5.5 5.5 0.7 0.7 0.1 Front End Loader (Passby) 1 71.2 Skid Steer Loaders 50 71.1 1 60 71 5.4 5 0 10 40 50 11.4 40.3 50.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Paving - Asphalt (Paver + Dump Truck) 1 81.8 Pavers 50 81.7 1 60 82 5.0 5 0 10 40 50 11.2 40.3 50.0 0.00 0.1 5.0 5.0 0.7 0.7 0.1 Paving - Concrete (Texturing/Curing Machine) 1 73.3 Paving Equipment 50 73.2 1 60 73 8.0 5 0 10 40 50 12.8 40.3 50.1 0.00 0.1 6.5 6.5 0.6 0.6 0.1 Compactor (Roller) 1 82.4 Rollers 50 82.3 1 60 82 4.4 5 0 10 40 50 10.9 40.3 50.0 0.00 0.1 4.7 4.7 0.7 0.7 0.1 Concrete Mixer Truck 1 81.1 Cement Mixer 50 81.0 1 60 81 5.0 5 0 10 40 50 11.2 40.3 50.0 0.00 0.1 5.0 5.0 0.7 0.7 0.1 Man Lift 1 72.1 Boom Lift 50 72.0 1 60 72 5.8 5 0 10 40 50 11.6 40.3 50.0 0.00 0.1 5.4 5.4 0.7 0.7 0.1

87.5 magnitude of threshold (dBA) per LA County Code Sec. 12.08.440 = allowable hours over which Leq is to be averaged =
Total for Demolition Phase:

Total for Site Preparation, Clearing and Grubbing Phase:

Total for Reservoir Excavation Phase:

Total for Reservoir Construction Phase:

Total for Installation of Stormwater Drainage Infrastructure Phase:

Total for Installation of Other Drainage Infrastructure Phase:

Total for Pedestrian Bridge Construction Phase:

Total for Other Site Improvements Phase:

RCNM2-emulator_wschedule_edits102125 Dudek Project No. 16537 LACounty-M_AllConcurrent Eaton Wash Stormwater Capture Project / Noise and Vibration Technical Analysis Appendix G -- Construction Noise Modeling Data Source to barrier distance Varies 60
Receiver to barrier distance Varies 1 0 = Del Mar Site Improvements -- temporary barrier (TB) of input height inserted between source and receptor Receiver height 5
Construction Activity Equipment Total Equipment
Qty
Reference Level (Leq or
Lmax) @ 50 ft. from FHWA
RCNM 2 Table
Air Quality/Client Equipment
Description, Data Source and/or
Notes
Source to NSR
Distance (ft.)
Distance-
Adjusted Level
Allowable
Operation Time
(hours)
Allowable
Operation Time
(minutes)
Predicted 1-
hour Leq
Source
Elevation (ft)
Receiver
Elevation (ft)
Barrier
Height (ft)
Source to Barr.
("A") Horiz. (ft)
Rcvr. to Barr.
("B") Horiz. (ft)
Source to Rcvr.
("C") Horiz. (ft) "A" (ft) "B" (ft) "C" (ft) Path Length Diff. "P" (ft) Abarr (dB) Heff (with
barrier)
Heff (wout
barrier)
G (with
barrier)
G (without
barrier) ILbarr (dB) Notes
Demolition Dozer 0

80.0 Rubber Tired Dozers 230 62.6 1.00 60 0 5.3 5 0 10 220 230 11.3 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 0 71.2 Skid Steer Loaders 230 53.8 1.00 60 0 5.4 5 0 10 220 230 11.4 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Grader (passby) 0 78.5 Grader 230 61.2 1.00 60 0 6.0 5 0 10 220 230 11.7 220.1 230.0 0.00 0.1 5.5 5.5 0.7 0.7 0.1

0.0 Site Preparation, Clearing and Grubbing Dozer 0 80.0 Rubber Tired Dozers 230 62.6 1 60 0 5.3 5 0 10 220 230 11.3 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Power Tools - Jackhammer 1 91.0 Jack Hammer 230 59.6 1 60 60 1.0 5 4 3 227 230 4.2 227.0 230.0 1.21 13.8 7.0 3.0 0.6 0.7 13.6 Jackhammer used behind a plywood sheet (e.g., 4' x 8') Backhoe 0 75.8 Tractors/Loaders/Backhoes 230 58.3 1 60 0 4.5 5 0 10 220 230 11.0 220.1 230.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

59.6 Reservoir Excavation Dozer 0 80.0 Rubber Tired Dozers 280 60.6 1 60 0 5.3 5 0 10 270 280 11.3 270.0 280.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 0 71.2 Skid Steer Loaders 280 51.9 1 60 0 5.4 5 0 10 270 280 11.4 270.0 280.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 0 75.8 Tractors/Loaders/Backhoes 280 56.4 1 60 0 4.5 5 0 10 270 280 11.0 270.0 280.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

0.0 Reservoir Construction Crane 0 74.2 Crane 625 47.1 1 60 0 7.7 5 0 10 615 625 12.6 615.0 625.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Dozer 0 80.0 Rubber Tired Dozers 625 52.8 1 60 0 5.3 5 0 10 615 625 11.3 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 0 71.2 Skid Steer Loaders 625 44.1 1 60 0 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

0.0 Installation of Stormwater Drainage Infrastructure Crane 0 74.2 Crane 625 47.1 1 60 0 7.7 5 0 10 615 625 12.6 615.0 625.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Excavator 0 75.9 Trencher 625 48.8 1 60 0 6.2 5 0 10 615 625 11.8 615.0 625.0 0.00 0.1 5.6 5.6 0.7 0.7 0.1 Front End Loader (Passby) 0 71.2 Skid Steer Loaders 625 44.1 1 60 0 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

0.0 Installation of Other Drainage Infrastructure Dozer 0 80.0 Rubber Tired Dozers 625 52.8 1 60 0 5.3 5 0 10 615 625 11.3 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 0 71.2 Skid Steer Loaders 625 44.1 1 60 0 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 0 75.8 Tractors/Loaders/Backhoes 625 48.7 1 60 0 4.5 5 0 10 615 625 11.0 615.0 625.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

0.0 Pedestrian Bridge Construction Backhoe 0 75.8 Tractors/Loaders/Backhoes 670 48.0 1 60 0 4.5 5 0 10 660 670 11.0 660.0 670.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1 Crane 0 74.2 Crane 670 46.5 1 60 0 7.7 5 0 10 660 670 12.6 660.0 670.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1

0.0 Other Site Improvements Grader (passby) 0 78.5 Grader 230 61.2 1 60 0 6.0 5 0 10 220 230 11.7 220.1 230.0 0.00 0.1 5.5 5.5 0.7 0.7 0.1 Front End Loader (Passby) 0 71.2 Skid Steer Loaders 230 53.8 1 60 0 5.4 5 0 10 220 230 11.4 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Paving - Asphalt (Paver + Dump Truck) 0 81.8 Pavers 230 64.4 1 60 0 5.0 5 0 10 220 230 11.2 220.1 230.0 0.00 0.1 5.0 5.0 0.7 0.7 0.1 Paving - Concrete (Texturing/Curing Machine) 0

73.3 Paving Equipment 230 56.1 1 60 0 8.0 5 0 10 220 230 12.8 220.1 230.0 0.00 0.1 6.5 6.5 0.6 0.6 0.1 Compactor (Roller) 0 82.4 Rollers 230 64.9 1 60 0 4.4 5 0 10 220 230 10.9 220.1 230.0 0.00 0.1 4.7 4.7 0.7 0.7 0.1 Concrete Mixer Truck 0 81.1 Cement Mixer 230 63.7 1 60 0 5.0 5 0 10 220 230 11.2 220.1 230.0 0.00 0.1 5.0 5.0 0.7 0.7 0.1 Man Lift 0 72.1 Boom Lift 230 54.7 1 60 0 5.8 5 0 10 220 230 11.6 220.1 230.0 0.00 0.1 5.4 5.4 0.7 0.7 0.1

0.0 Total for Installation of Stormwater Drainage Infrastructure Phase:

Total for Installation of Other Drainage Infrastructure Phase:

Total for Pedestrian Bridge Construction Phase:

Total for Other Site Improvements Phase:
magnitude of threshold (dBA) per LA County Code Sec. 12.08.440 = allowable hours over which Leq is to be averaged =
Total for Demolition Phase:

Total for Site Preparation, Clearing and Grubbing Phase:

Total for Reservoir Excavation Phase:

Total for Reservoir Construction Phase:

RCNM2-emulator_wschedule_edits102125 Dudek Project No. 16537 LACounty-S_AllConcurrent Eaton Wash Stormwater Capture Project / Noise and Vibration Technical Analysis Appendix G -- Construction Noise Modeling Data Source to barrier distance Varies 75
Receiver to barrier distance Varies 1 10 = Del Mar Site Improvements -- temporary barrier (TB) of input height inserted between source and receptor Receiver height 5
Construction Activity Equipment Total Equipment
Qty
Reference Level (Leq or
Lmax) @ 50 ft. from FHWA
RCNM 2 Table
Air Quality/Client Equipment
Description, Data Source and/or
Notes
Source to NSR
Distance (ft.)
Distance-
Adjusted Level
Allowable
Operation Time
(hours)
Allowable
Operation Time
(minutes)
Predicted 1-
hour Leq
Source
Elevation (ft)
Receiver
Elevation (ft)
Barrier
Height (ft)
Source to Barr.
("A") Horiz. (ft)
Rcvr. to Barr.
("B") Horiz. (ft)
Source to Rcvr.
("C") Horiz. (ft) "A" (ft) "B" (ft) "C" (ft) Path Length Diff. "P" (ft) Abarr (dB) Heff (with
barrier)
Heff (wout
barrier)
G (with
barrier)
G (without
barrier) ILbarr (dB)
Demolition Dozer 2 80.0 Rubber Tired Dozers 230 62.6 1.00 60 66 5.3 5 0 10 220 230 11.3 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 1 71.2 Skid Steer Loaders 230 53.8 1.00 60 54 5.4 5 0 10 220 230 11.4 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Grader (passby) 2 78.5 Grader 230 61.2 1.00 60 64 6.0 5 0 10 220 230 11.7 220.1 230.0 0.00 0.1 5.5 5.5 0.7 0.7 0.1

68.1 Site Preparation, Clearing and Grubbing Dozer 3 80.0 Rubber Tired Dozers 230 62.6 1 60 67 5.3 5 0 10 220 230 11.3 220.1 230.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Power Tools - Jackhammer 0 91.0 Jack Hammer 230 73.2 1 60 0 1.0 5 0 10 220 230 10.0 220.1 230.0 0.00 0.1 3.0 3.0 0.7 0.7 0.1 Backhoe 4 75.8 Tractors/Loaders/Backhoes 230 58.3 1 60 64 4.5 5 0 10 220 230 11.0 220.1 230.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

69.1 Reservoir Excavation Dozer 2 80.0 Rubber Tired Dozers 280 60.6 1 60 64 5.3 5 0 10 270 280 11.3 270.0 280.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 280 51.9 1 60 55 5.4 5 0 10 270 280 11.4 270.0 280.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 3 75.8 Tractors/Loaders/Backhoes 280 56.4 1 60 61 4.5 5 0 10 270 280 11.0 270.0 280.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

65.9 Reservoir Construction Crane 1 74.2 Crane 625 47.1 1 60 47 7.7 5 0 10 615 625 12.6 615.0 625.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Dozer 2 80.0 Rubber Tired Dozers 625 52.8 1 60 56 5.3 5 0 10 615 625 11.3 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 625 44.1 1 60 47 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

56.9 Installation of Stormwater Drainage Infrastructure Crane 1 74.2 Crane 625 47.1 1 60 47 7.7 5 0 10 615 625 12.6 615.0 625.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1 Excavator 2 75.9 Trencher 625 48.8 1 60 52 6.2 5 0 10 615 625 11.8 615.0 625.0 0.00 0.1 5.6 5.6 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 625 44.1 1 60 47 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1

54.0 Installation of Other Drainage Infrastructure Dozer 2 80.0 Rubber Tired Dozers 625 52.8 1 60 56 5.3 5 0 10 615 625 11.3 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Front End Loader (Passby) 2 71.2 Skid Steer Loaders 625 44.1 1 60 47 5.4 5 0 10 615 625 11.4 615.0 625.0 0.00 0.1 5.2 5.2 0.7 0.7 0.1 Backhoe 3 75.8 Tractors/Loaders/Backhoes 625 48.7 1 60 53 4.5 5 0 10 615 625 11.0 615.0 625.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1

58.2 Pedestrian Bridge Construction Backhoe 3 75.8 Tractors/Loaders/Backhoes 670 48.0 1 60 53 4.5 5 0 10 660 670 11.0 660.0 670.0 0.00 0.1 4.8 4.8 0.7 0.7 0.1 Crane 1 74.2 Crane 670 46.5 1 60 46 7.7 5 0 10 660 670 12.6 660.0 670.0 0.00 0.1 6.4 6.4 0.6 0.6 0.1

53.7 Other Site Improvements Grader (passby) 1 78.5 Grader 50 65.2 1 60 65 6.0 5 10 10 40 50 10.8 40.3 50.0 1.07 13.3 15.5 5.5 0.5 0.7 13.3 Front End Loader (Passby) 1 71.2 Skid Steer Loaders 50 57.0 1 60 57 5.4 5 10 10 40 50 11.0 40.3 50.0 1.32 14.2 15.2 5.2 0.5 0.7 14.2 Paving - Asphalt (Paver + Dump Truck) 1 81.8 Pavers 50 67.0 1 60 67 5.0 5 10 10 40 50 11.2 40.3 50.0 1.49 14.7 15.0 5.0 0.5 0.7 14.7 Paving - Concrete (Texturing/Curing Machine) 1 73.3 Paving Equipment 50 64.0 1 60 64 8.0 5 10 10 40 50 10.2 40.3 50.1 0.42 9.3 16.5 6.5 0.5 0.6 9.3 Compactor (Roller) 1 82.4 Rollers 50 67.3 1 60 67 4.4 5 10 10 40 50 11.5 40.3 50.0 1.77 15.0 14.7 4.7 0.5 0.7 15.0 Concrete Mixer Truck 1 81.1 Cement Mixer 50 66.3 1 60 66 5.0 5 10 10 40 50 11.2 40.3 50.0 1.49 14.7 15.0 5.0 0.5 0.7 14.7 Man Lift 1 72.1 Boom Lift 50 58.4 1 60 58 5.8 5 10 10 40 50 10.8 40.3 50.0 1.15 13.6 15.4 5.4 0.5 0.7 13.6

73.4 Total for Installation of Stormwater Drainage Infrastructure Phase:

Total for Installation of Other Drainage Infrastructure Phase:

Total for Pedestrian Bridge Construction Phase:

Total for Other Site Improvements Phase:
magnitude of threshold (dBA) per LA County Code Sec. 12.08.440 = allowable hours over which Leq is to be averaged =
Total for Demolition Phase:

Total for Site Preparation, Clearing and Grubbing Phase:

Total for Reservoir Excavation Phase:

Total for Reservoir Construction Phase:

RCNM2-emulator_wschedule_edits102125 Dudek Project No. 16537 LACounty-M_Mitigated (MM-NOI-1)