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City of Bellevue, WA Development Services
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State Construction Stormwater General Permit

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    Plan Submittal Resources

    • Addressing Site Plan
    • Administrative Departures
    • Architectural Plan
    • Assessors Map
    • Basic Site Plan
    • Boundary and Topographic Survey
    • Building Design Documents
    • Building Elevations
    • Building Floor Plan
    • Clearing and Grading CSWPPP Requirements
    • Comprehensive Plan Policy
    • Deferred Submittal Guidelines
    • Design Guidelines
    • Easements Plan
    • Egress Lighting Requirements and Inspection
    • Fire Response Plan
    • Generator Permit Requirements
    • Landscape Plan
    • Lot Layout Plan
    • Mitigation Plan
    • Onsite Exterior Lighting Plan
    • Plat Map
    • Pool and Spa Plan
    • Preapplication Conference for Preliminary Plats and Planned Unit Developments
    • Preliminary Civil Plans
    • Preliminary Storm Drainage Report
    • Preliminary Traffic Plans
    • Project Proposal
    • Requirements for Recorded Documents
    • Residential Site Plan
    • Road Plan
    • Shoring Plan
    • Sign Permits - Building Review
    • Sign Permits - Plans and Drawings
    • Site Coordination Plan
    • Site and Infrastructure Design Documents
    • State Construction Stormwater General Permit
    • Storm Drainage Report
    • Stormwater Site Plan
    • Street Lighting Plan
    • Structural Plan Requirements
    • Variance Criteria Letter

    This information comes from the Washington State Department of Ecology and covers the state Construction Stormwater General Permit. For additional information call 360-407-6467 or visit the Department of Ecology’s website. 

    Background

    Stormwater runoff from construction sites can carry muddy water, debris and chemicals into local waterways. Sediments, chemicals and debris can harm aquatic life and reduce water quality.

    The Washington State Department of Ecology requires construction sites to get coverage under the Construction Stormwater General Permit (CSWGP). Following the requirements in this permit helps control and reduce water pollution. If water on your construction site is contaminated, refer to Guidance for Contaminated Water on Construction Sites.

    Operators of regulated construction sites are required to:

    1. Develop stormwater pollution prevention plans.
    2. Implement sediment, erosion and pollution prevention control measures.
    3. Obtain coverage under this permit.

    The current modified permit went into effect May 5, 2017, and expires December 31, 2020.

    Who Needs Coverage?

    Many construction sites will need to apply for coverage under the CSWGP. Construction site operators are required to be covered if both of these apply:

    1. Your construction project disturbs land* through clearing, grading, excavating or stockpiling of fill material. 
      • Sites that disturb one acre or more.
      • Sites that are smaller than one acre that are part of a larger common plan of development that will ultimately disturb one acre or more and discharge stormwater to surface waters.
      • Sites of any size discharging stormwater to state waters (Waters of the State) that are determined to be a significant contributor of pollutants.
      • Sites of any size that are reasonably expected to cause a violation of any water quality standard.
         
    2. There is any possibility that during construction, stormwater could run off your site or enter a conveyance system that leads to surface waters. In almost every case it does. If the location of your site poses no possibility that rainfall or snow melt could leave the site or enter a waterway, you do not need a permit.

    *count the cumulative acreage of the whole project, whether it's single or multi-phase. Include off-site disturbance acreage from support activities related to the construction site. This applies if your project is a portion (less than one acre) of a larger project planned over time.

    How to Apply

    Refer to the Construction Stormwater General Permit information on the Department of Ecology's website. You will need to set up an account using their WQWebPortal to apply for coverage.  

    Contact

    450 110th Ave NE
    P.O. Box 90012
    Bellevue, WA 98009
    Telephone
    425-452-2019
    Hearing Impaired
    711
    Email
    clearandgradereview@bellevuewa.gov

    Reasonable Accommodation

    For alternate formats, interpreters, or reasonable modification requests please phone at least 48 hours in advance 425-452-6800 (voice) or email servicefirst@bellevuewa.gov. For complaints regarding modifications, contact the City of Bellevue ADA, Title VI, and Equal Opportunity Officer at ADATitleVI@bellevuewa.gov.

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