City of San Jose / Santa Clara Valley (SCVURPPP)

C.3 Stormwater Handbook

CityCaliforniahighNoCitations verified

Fields not found in document: design_criteria.design_storm_return_periods_years

Other manuals in California: Alameda Countywide Clean Water Program (ACCWP) / City of Fremont, California, California Department of Transportation (Caltrans), California Department of Transportation (Caltrans), City of Anaheim, City of Bakersfield, City of Chula Vista, City of Long Beach, City of Oakland, City of Sacramento, City of San Diego, City of San Francisco, City of Santa Barbara, City of Santa Rosa, City of Stockton / San Joaquin County, County of Los Angeles, County of Orange, Fresno Metropolitan Flood Control District, Riverside County, San Bernardino County, Tahoe Regional Planning Agency (Lake Tahoe Region)

Document Metadata

Jurisdiction level

City

“Member agencies (Co-permittees) include Campbell, Cupertino, Los Altos, Los Altos Hills, Los Gatos, Milpitas, Monte Sereno, Mountain View, Palo Alto, San Jose, Santa Clara, Saratoga, Sunnyvale, the County of Santa Clara, and Valley Water.”
Credits / Program background

State

California

“discharge stormwater to South San Francisco Bay”
Program background

Version / edition

October 2024

“on May 22, 2022 and amended on October 11, 2023. New Development Land disturbing activities, construction or installation of a building or structure, creation of impervious surfaces, and/or land subdivision on a previously undeveloped site. Non-Stormwater Discharge Any d”
p. 19

Adoption / effective date

2024-10

“on May 22, 2022 and amended on October 11, 2023. New Development Land disturbing activities, construction or installation of a building or structure, creation of impervious surfaces, and/or land subdivision on a previously undeveloped site. Non-Stormwater Discharge Any d”
p. 19

Last revised date

2024-10

“on May 22, 2022 and amended on October 11, 2023. New Development Land disturbing activities, construction or installation of a building or structure, creation of impervious surfaces, and/or land subdivision on a previously undeveloped site. Non-Stormwater Discharge Any d”
p. 19

Relationship to state manual

independent

“Guidance for Implementing Stormwater Requirements for New Development and Redevelopment Projects”
Cover / subtitle

Design Criteria

Design storm return periods (years)

Not found in document

No evidence cited

Water quality volume method

MRP Provision C.3.d numeric sizing: volume-based treatment sized for stormwater quality volume equal to 80% of annual runoff using the California Stormwater BMP Handbook Approach adapted for Santa Clara Valley (continuous simulation sizing curves in Appendix B; recommended over WEF/URQM). Alternate MRP option: WEF Urban Runoff Quality Management volume capture coefficients. Flow-based treatment sized per MRP C.3.d (including 85th percentile hourly intensity ranking method). Bioretention and flow-through planters may use flow-, volume-, or combination sizing. Regulated Projects typically create/replace ≥5,000 sf impervious (≥10,000 sf detached single-family; ≥1 acre road reconstruction).

“Determine the stormwater quality volume equal to 80% of the annual runoff, in accordance with the methodology in Appendix D of the California Stormwater Best Management Practices Handbook (2003) using local rainfall data (known as the California BMP Handbook Approach).”
Chapter 5 Volume-Based Sizing Criteria

Peak flow calculation method(s)

MRP Provision C.3.d hydraulic sizing (flow-based, volume-based, or combination), Bay Area Hydrology Model (BAHM 2023) for hydromodification management / flow duration control where HM applies, California Stormwater BMP Handbook Approach continuous simulation sizing curves (Santa Clara Valley rain gages)

“Bay Area Hydrology Model (BAHM 2023), developed by the Urban Runoff Program… The BAHM has been… sizing is in compliance with the MRP.”
Hydromodification / BAHM discussion

Hydrologic/hydraulic software

Bay Area Hydrology Model (BAHM 2023) where hydromodification management sizing is required

“The BAHM 2023 may be downloaded at:”
HM / BAHM section

Approved BMP categories

Bioretention area, Flow-through planter box, Tree well filter, Infiltration trench, Subsurface infiltration system, Rainwater harvesting and reuse, Media filter (non-LID; Special Projects), Extended detention basin (non-LID), Pervious paving / self-treating and self-retaining areas, Green roofs (site design / treatment guidance)

“Bioretention area; Flow-through planter box; Tree well filter; Infiltration trench; Subsurface infiltration system; Rainwater harvesting and reuse; Media filter; Extended detention basin”
Table 5-1