Rialto Baseline Storm Drain Project


SCH Number
Lead Agency
City of Rialto
Document Title
Rialto Baseline Storm Drain Project
Document Type
MND - Mitigated Negative Declaration
Present Land Use
Open Space Resource Use / Rialto Airport Specific Plan, Cactus Basin (OS-CB)

Document Description
The City of Rialto desires to upgrade existing drainage infrastructure conditions within Baseline Avenue from Cactus Basin west to Tamarind Avenue. The project consists of installing an approximately 2-mile or 11,000 lineal feet storm drain system within Baseline Road that would capture flows north of Baseline Road. The storm drain line starts at the Tamarind Avenue/Baseline Road intersection and runs along Baseline Road to the outlet at Cactus Basin No. 3. The new storm drain will be developed within a reinforced concrete box that will vary in size between 6’ x 12’, 7’ x 7’, and 3’ x 10’ depending on the location within the new storm drain alignment. The majority of the storm drain footprint (located within Baseline Road) will be constructed as a 84” reinforced concrete pipe, though a portion of the easternmost section of the alignment, which encompasses the section from Baseline Road to Cactus Basin, will vary in size as either a 72”, 84”, 48”, 36”, or 30” RCP. Flows leaving Basin No. 3 continue on to Basin 1 and 2 and Rialto Channel, which ultimately discharges to the Santa Ana River. Outflow from the Cactus Basin System are limited due to the poor downstream channel capacities.

Contact Information
Savat Khamphou, Interim City Engineer
City of Rialto
Lead/Public Agency
335 W. Rialto Avenue
Rialto, CA 92376

Phone : (909) 421-7210

City of Rialto
Project Applicant


34°7'26"N 117°23'17"W
San Bernardino
Cross Streets
Cactus Avenue and Baseline Road
State Highways

Notice of Completion

Review Period Start
Review Period End
Development Type
Other (Infrastructure)
Local Action
Reviewing Agencies
California Air Resources Board (ARB) California Department of Conservation (DOC) California Department of Parks and Recreation California Department of Transportation, District 8 (DOT) California Department of Transportation, Division of Aeronautics (DOT) California Department of Water Resources (DWR) California Governor's Office of Emergency Services (OES) California Highway Patrol (CHP) California Native American Heritage Commission (NAHC) California Natural Resources Agency California Public Utilities Commission (CPUC) California Regional Water Quality Control Board, Santa Ana Region 8 (RWQCB) California State Lands Commission (SLC) Department of Toxic Substances Control Office of Historic Preservation State Water Resources Control Board, Division of Drinking Water State Water Resources Control Board, Division of Water Quality State Water Resources Control Board, Division of Water Rights State Water Resources Control Board, Divison of Financial Assistance California Department of Fish and Wildlife, Inland Deserts Region 6 (CDFW)


Environmental Document
Appendices 1-4   PDF 16274 K Document Summary Transmittal form   PDF 979 K draft MND   PDF 82 K IS-MND Rialto Baseline Storm Drain (Sept 2020)   PDF 6002 K Notice of Intent   PDF 44 K
Notice of Completion   PDF 101 K
State Comments
2020090296_CDFW Comment   PDF 383 K

Disclaimer: The Governor’s Office of Planning and Research (OPR) accepts no responsibility for the content or accessibility of these documents. To obtain an attachment in a different format, please contact the lead agency at the contact information listed above. You may also contact the OPR via email at state.clearinghouse@opr.ca.gov or via phone at (916) 445-0613. For more information, please visit OPR’s Accessibility Site.

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