Ecology, working with a Steering Committee of Eastern Washington Phase II National Pollutant Discharge Elimination System (NPDES) permittees, completed a 2019 update of the Stormwater Management Manual for Eastern Washington. RKI helped incorporate the latest advances in design, construction, and maintenance techniques for conventional and Low Impact Development stormwater BMPs into the manual and provided team facilitation and public outreach, helping to gather and incorporate necessary inputs for successful use of the manual.

RKI is providing permit support, development review, engineering standards updates, and stormwater management planning for the Seattle-Tacoma International Airport (STIA) under the Port of Seattle’s Indefinite Delivery Indefinite Quantity (IDIQ) Environmental Review and Permitting Services contract. Recent tasks include development of the STIA LID Guideline for compliance with the Airport’s NPDES Individual Permit and Federal Aviation Administration requirements for commercial airport operations, planning for regional infiltration facilities, and assistance with Port policies and strategic goals.

RKI updated the City’s Storm and Surface Water Engineering Standards to comply with National Pollutant Discharge Elimination System (NPDES) permit requirements, including new requirements for Low Impact Development (LID), and provided training for municipal staff and design professionals on how to use the new standards in the preparation and permit review of stormwater site plans.

RKI led the 2016 update of the County’s codes and engineering standards to meet requirements of the National Pollutant Discharge Elimination System (NPDES) Western Washington Phase II Municipal Stormwater Permit, including review and update of the County’s roadway, stormwater, subdivision, and landscape codes; update of the County’s Stormwater Design Manual; and development of outreach materials to educate designers on how to comply with the updated codes and standards.