Stormwater Compliance Support for Public Infrastructure Projects
Public infrastructure projects in Washington face strict stormwater requirements from early earthwork through final closeout. Road rebuilds, culvert replacements, utility upgrades, drainage improvements, and public facility projects all require coordinated planning to manage runoff, groundwater, sediment, discharge, and documentation.
Washington Stormwater helps public agencies reduce compliance risk and project strain by managing the stormwater systems, permits, erosion controls, dewatering support, and reporting needed to keep infrastructure work moving.
We Support the Full Range of Public Infrastructure Projects
Public works construction disturbs soil, encounters groundwater, and generates stormwater discharge that must be managed and documented from the first day of earthwork through final closeout. Washington Stormwater provides the treatment systems, permits, CESCL oversight, and compliance management your project requires so your team can focus on delivering infrastructure.
We work on:
- Road reconstruction and widening projects
- Utility installation and replacement corridors
- Bridge and culvert replacement projects
- Below-grade excavation and foundation work
- Drainage improvement and conveyance projects
- Public facility construction and site development
Public Works Stormwater Services
Stormwater Treatment & Dewatering
Public works construction generates two distinct water challenges: rainfall runoff that picks up sediment and pollutants as it flows across disturbed ground, and groundwater that must be pumped out before below-grade work can continue.
Washington Stormwater deploys and operates dewatering and stormwater treatment systems for municipal projects, ensuring compliant discharge through every project phase and weather event. Our operators remain on-site throughout the project, managing systems around the clock and responding to storm events without waiting for a call from the project owner. Learn more about our Stormwater Management Solutions.
Permitting, Compliance & Reporting
Washington Stormwater provides stormwater permitting support and manages your Construction Stormwater General Permit application from start to finish. This includes the Notice of Intent, SWPPP, public notification, and Ecology coordination, with documentation completed within three days of engagement.
We also prepare and file your Discharge Monitoring Reports through Washington's WAWebDMR system, conduct environmental compliance assessments, and maintain the inspection records and project documentation your agency needs to stay audit-ready throughout the project. Learn more about our Permitting and Environmental Services.
Erosion, Sediment Control & Emergency Response
Washington State requires a Certified Erosion and Sediment Control Lead on permitted construction sites. Washington Stormwater's CESCL-certified team provides erosion and sediment control support for public works projects, including site assessment, BMP recommendations, and ongoing inspections for the full project duration.
When conditions change or weather creates unexpected risk, we respond immediately, stabilizing operations and restoring compliant discharge before a regulatory consequence occurs. Learn more about our Erosion and Sediment Control Services.
How We Work
1
Site Consultation
We review your project scope, site conditions, and permit requirements before recommending the right stormwater solution.
2
Permit Preparation & System Design
We prepare CSWGP applications, develop SWPPPs, design site-specific systems, and deliver proposals within 24 hours of your site visit.
3
Deployment & On-Site Management
We mobilize within 36 hours, have systems operational within two days, and provide storm response throughout the project.
4
DMR Filing & Project Closeout
We handle DMRs, maintain compliance documentation, and deliver a complete project record at closeout.
Why Public Agencies Work With Washington Stormwater
Serving Public Works Teams Across Washington State
Washington Stormwater supports cities, counties, utility districts, and state agencies on public infrastructure projects throughout Washington State. Based in Enumclaw, our team serves public works projects across King, Pierce, Thurston, Snohomish, and Whatcom Counties, including Seattle, Tacoma, Bellevue, Auburn, Everett, Renton, Kent, Olympia, Puyallup, and surrounding communities.
Contact us to confirm availability for your specific project location.