Development Projects/Environmental Info

The City of San Dimas (City) is proposing the adoption of a new specific plan (Project) for the City’s downtown area (Project Site). The City is the Lead Agency pursuant to the California Environmental Quality Act (CEQA) and has prepared a Draft Environmental Impact Report (EIR) for the Project. This Notice of Availability (NOA) is being distributed by the City to solicit written comments from responsible and trustee agencies and other interested organizations and individuals on the Draft EIR.

For more information about the Downtown Specific Plan (DTSP) project, to view the Draft DTSP and to view the Draft EIR , please click HERE and you will be redirected to the DTSP page.

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.

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