Our extensive project experience in Washington state has provided us with a clear understanding of the standards and methodologies necessary to successfully complete projects in a wide range of jurisdictions and situations. Examples include:

• WSDOT Highway Runoff Manual
• WSDOT Hydraulics Manual
• DOE Drainage Manuals
• County Drainage Manuals such as King, Snohomish, Pierce, Thurston, Jefferson, Skagit, Whatcom, Yakima, and Chelan
• City Drainage Manuals such as Seattle, Tacoma, Everett, Bothell, Bellevue, etc.
• Hydraulic and hydrologic models including Waterworks, HY-8 Culvert Analysis, HSPF V9, 10 and 11, KCRTS, WWHM, Stormshed, HEC-1, HEC-2, HEC-5, HEC-RAS, and HEC-Flood Frequency Analysis