King County Wastewater Treatment Division (WTD) proposes to install Green Stormwater Infrastructure (GSI) facilities to the maximum extent practicable to reduce the gray infrastructure demands needed for full Combined Sewer Overflow (CSO) control at the University Regulator Station Overflow. RKI is serving as the Interagency Permitting Lead, responsible for planning and obtaining SDOT Street Improvement Permits and other required construction permits.

The County Council requested a report from Road Services Division staff describing the location and condition of the County’s drainage trunk system within major road rights-of-way in unincorporated areas, the estimated accuracy of the resultant database, an analysis of the data to assess risks and impacts, and a prioritized program for maintenance. As Project Manager, RKI oversaw the condition and risk assessment of several thousand regional drainage assets and authored a strategic business plan to direct near- and long-term maintenance, repair, and renewal priorities.

RKI led the 2016 update of the City’s Stormwater Management Plan to address population growth, land use development, and requirements of the National Pollutant Discharge Elimination System (NPDES) Phase II Eastern Washington Permit. The plan characterizes existing drainage and water quality issues, identifies and prioritizes projects and programs that provide residents with the greatest value and protection, provides a financial plan and rate forecast, and helps the City prepare for possible future MS4 program audits.