Development Projects/Environmental Info

Initial Study and Mitigated Negative Declaration (IS/MND); Allen-Cataract Warehouse Project; 309 W Allen Avenue
Project Site Highlighted in Red:


Project Description:
Consideration of a Zone Change, Tree Removal, Lot Merger and Development Plan Review Board for the development of a two-story 63,749 square-foot two-unit warehouse facility including Unit One with 23,193 square feet of warehouse space, 1,000 square feet of office space and a 2,000 square-foot mezzanine; Unit Two with 34,556 square feet of warehouse space, 1,000 square feet of office space and a 2,000 square-foot mezzanine. The project site is currently developed with nine single-family residences, which will be demolished. The project would also provide landscaping, adequate access and circulation, and adequate parking and loading areas for passenger vehicles, trucks/tractor/trailer vehicles, and pedestrians.

Project Location:
The 2.58-acre project site is located at 309 West Allen Avenue, 917 North Cataract Avenue, and 929 North Cataract Avenue in the central part of the City of San Dimas. The project site consists of three parcels—with assessor’s parcel numbers (APNs) 8392-016-008, -048, and -047—developed with nine single-family residences. The project site is surrounded by industrial use to the north; light industrial and commercial uses opposite Cataract Avenue to the east; industrial use to the west; and single-family residences opposite Allen Avenue to the south. Local access to the Project Site is provided by Allen Avenue and Cataract Avenue and regional access is provided by the Interstate 210/Foothills Freeway, approximately 300 feet to the north.

The City of San Dimas hereby gives notice that pursuant to the authority and criteria contained in the California Environmental Quality Act (CEQA) and the CEQA Guidelines, Staff has analyzed the above Project Request.  After reviewing the Initial Study and any applicable mitigating measures for the project, Staff has determined that this project will not have a significant effect on the environment. Accordingly, a Mitigated Negative Declaration has been prepared.

Public comments on the Mitigated Negative Declaration will be received by the City beginning on March 7, 2023, through 5:00 PM on March 27, 2023. Architectural review for the proposed project will be considered by the Development Plan Review Board (DPRB) at a later date. Additionally, the proposed project and the proposed Mitigated Negative Declaration are anticipated to be heard by the San Dimas Planning Commission and the San Dimas City Council at a later date. Any future public meetings/hearings by either the DPRB, San Dimas Planning Commission or the San Dimas City Council will be noticed as required.

Copies of all relevant material, including the project specifications and all documents referenced in the Mitigated Negative Declaration, are available for public inspection at San Dimas City Hall, Planning Division, 245 E Bonita Ave, San Dimas, and the City’s website. City Hall is open Monday through Thursday, 7:30 a.m. to 5:30 p.m., and on Fridays from 7:30 a.m. to 4:30 p.m. The project site is not listed on any list of hazardous waste sites prepared pursuant to Government Code Section 65962.5.

The City is requesting your participation in this public review process. Please submit written comments relating to the Mitigated Negative Declaration. Correspondence should be addressed to the City of San Dimas, Community Development Department, 245 East Bonita Avenue, San Dimas, CA 91773. All comments must be received by no later than 5:00 p.m. on March 27, 2023. 

Please click on the document links below:

• CEQA Notice of Intent to Adopt a Mitigated Negative Declaration
• Draft Initial Study/Mitigated Negative Declaration

• Appendix A – Project Plans
• Appendix B – Air Quality & Greenhouse Gas Emissions Assessment
• Appendix C1 – Biological Resources Evaluation
• Appendix C2 – Arborist Report
• Appendix D1 – Cultural Resources Assessment
• Appendix D2 – Paleontological Records Search
• Appendix D3 – Historical Assessment
• Appendix E1 – Geotechnical Report
• Appendix E2 – Percolation Test
• Appendix F – Phase 1 Environmental Site Assessment
• Appendix G – Transportation Assessment Memorandum
• Appendix H – Low Impact Development Plan (LID)
• Appendix I – Ambient Noise Measurement Data

• Agenda and Staff Report for January 19, 2022 Planning Commission Meeting
• Public Hearing Notice
• CEQA Notice of Intent to Adopt a Mitigated Negative Declaration
• Draft Initial Study/Mitigated Negative Declaration
• Technical Studies

• • Appendix A - Planning Area I Lot Coverage
  • Appendix B - Air Quality & Greenhouse Gas Emissions Data
  • Appendix C - Biological Resources Evaluation
  • Appendix D - Cultural Phase I Report
  • Appendix E - Fuel Consumption Analysis
  • Appendix F - Paleo Records Search
  • Appendix G - Hydrology Drainage Report