City of Santa Rosa

2020 Storm Water Low Impact Development Technical Design Manual

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Prepared from City DocumentCenter View/14974 (listed as 2017 narrative URL); extracted text headers identify the 2020 LID Technical Design Manual. Covers Santa Rosa and Sonoma County co-permittees geographically.

Fields not found in document: document_metadata.adoption_or_effective_date, document_metadata.last_revised_date, 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 San Jose / Santa Clara Valley (SCVURPPP), City of Santa Barbara, 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

“City of Santa Rosa”
Chapter 1

State

California

“North Coast Regional Water Quality Control Board”
Acronyms

Version / edition

2020

“2020 Storm Water Low Impact Development Technical Design Manual”
TOC footer

Adoption / effective date

Not found in document

No evidence cited

Last revised date

Not found in document

No evidence cited

Relationship to state manual

independent

“This design manual is covered under the North Coast Regional Area (Region 1)”
Acronyms — NCRWQCB

Design Criteria

Design storm return periods (years)

Not found in document

No evidence cited

Water quality volume method

Water quality design storm is 1.0 inch in a 24-hour period. Treatment: treat all runoff from impermeable surfaces generated by that storm. Delta Volume Capture: infiltrate/reuse any increase in runoff volume for the WQ storm (projects creating/replacing <1 acre impervious); hydromodification control for ≥1 acre requires capture and retention of 100% of post-development volume from 1.0" rain over 24 hours. Volume calculations use the Curve Number Method.

“The water quality design storm used for all SWLIDS calculations is 1.0 inch in a 24-hour period.”
Chapter 6 — Design Requirements

Peak flow calculation method(s)

Curve Number Method, TR-55 (referenced)

“All volume calculations are completed using the Curve Number Method”
Chapter 6

Hydrologic/hydraulic software

Storm Water Calculator (Appendix C)

“Storm Water Calculator located in Appendix C”
Chapter 4

Approved BMP categories

Rainwater harvesting, Green roofs, Interceptor trees, Buffer strips, Flow-through planters, Downspout disconnects / impervious area disconnection, Bioretention, Pervious concrete / permeable pavement, Detention (lower priority), Proprietary units (constrained sites)

“rainwater harvesting, green roofs, interceptor trees, buffer strips, and flow through planters”
Chapter 5 — Universal BMPs