State and federal storm water regulations require development and remodeling projects in the City to incorporate design standards and Best Management Practices (BMPs) in order to reduce storm water pollution and minimize the potential for erosion.
NEW STORM WATER MANAGEMENT REQUIREMENTS FOR DEVELOPMENT AND REDEVELOPMENT PROJECTS IN THE CITY OF SANTA CRUZ
The Central Coast Regional Water Quality Control Board adopted Resolution R3-2013-0032 in July 2013 approving new Post-Construction Stormwater Management Requirements for Development Projects in the Central Coast. The municipalities of the Central Coast must enforce these new requirements by March 6, 2014. To learn more about the new Central Coast requirements, go to: http://www.waterboards.ca.gov/centralcoast/water_issues/programs/stormwater/docs/lid/lid_hydromod_charette_index.shtml
The City is updating its Chapter 6 Storm Water BMP Requirements for Development and Redevelopment to meet the new regional requirements. See below for guidance on how to meet the new City requirements:
Effective March 6, 2014: STORM WATER BMP REQUIREMENTS FOR PRIVATE AND PUBLIC DEVELOPMENT PROJECTS
REVISED STORM WATER AND LOW-IMPACT DEVELOPMENT BMP REQUIREMENT WORKSHEET (March 2014) - in fillable Excel format.
For projects that require the installation of structural storm water management BMPs (including LID and conventional storm water treatment) property owners will need to submit a signed Storm Water BMP Maintenance Agreement before obtaining a Building Permit.
Central Coast Region Stormwater Control Measures Sizing Calculator
This calculator was developed to help projects subject to Tier 3 of the requirements size bioretention facilities to meet the runoff retention performance standards. Information that must be input into the calculator is listed in the BMP guidance and in the sizing calculator instructions provided below. Project applicants can either use this calculator or the "simple method" provided in the BMP guidance to design facilities to meet the runoff retention requirement.
Central Coast SCM Sizing Calculator
Sizing Calculator how-to guide
This calculator was developed by Santa Barbara County under a State Proposition 84 grant.
Watershed Management Zones
For projects subject to Tier 3 of the new requirements, the Regional Board incorporated a spatial element to the requirements in the form of Watershed Management Zones. Links to City of Santa Cruz-specific Watershed Management Zone maps for Runoff Retention in PDF format are below:
Tier 3 - Runoff Retention Watershed Management Zones
85th and 95th Percentile Rainfall Depths
The Central Coast Post-Construction Requirements stipulate that municipalities must require Regulated Projects to use rainfall statistics provided by the Central Coast Water Board or to calculate site-specific rainfall depths determined from local rainfall data using USEPA’s methodology. See below for City of Santa Cruz Rainfall Depth Maps based on Central Coast Water Board data:
85th Percentile 24-hour Rainfall Depth Map
95th Percentile 24-hr Rainfall Depth Map
Urban Sustainability Areas
In order to support mixed-use redevelopment and infill within City limits, the City designated areas identified in our General Plan 2030 as community and regional business centers and primary transportation corridors as "Urban Sustainability Areas." Within Urban Sustainability Areas, redevelopment project that are subject to Tier 3 Requirements and that meet certain density requirements may claim reduced runoff retention requirements. See the City's Urban Sustainability Area Designation for more detail.
Additional Source Control BMPs for Projects with Special Site Conditions
Proposed projects with special site conditions shall incorporate relevant source control measures in their operation and maintenance plans. See the links below for relevant City of Santa Cruz and CASQA BMP guidance. Projects with special site conditions include:
LID Guidance for Single-Family Homes
Effective March 6, 2014: STORM WATER BMP REQUIREMENTS FOR SINGLE-FAMILY HOMES ON SMALL LOTS
LID Site Design Checklist for Single-Family Home Projects (March 2014) - in fillable PDF format
Managing Storm Water Runoff on your property
(for Residential Properties)
For practical and eco-friendly ways to protect your property and the environment from the effects of storm water runoff, please click on the link below for the brochure "Slow it. Spread it. Sink it! A Homeowner's Guide to Greening Stormwater Runoff" which was published by the Resource Conservation District of Santa Cruz County.
If you would like a copy of this brochure, please call Suzanne Healy, Environmental Projects Analyst, at 831-420-5131, or Angie Stuart, Resource Conservation District, at 831-464-2950 x22.
For more information about the City's Storm Water BMP Requirements for development and redevelopment projects, please contact Agnes Topp, Environmental Projects Analyst, at 831-420-5423.
For additional Public Works requirements:
Private Development and Public Right-of-Way Requirements [PDF]