Rainier Stormwater Engineering was founded by licensed professional engineers that are capable of providing our clients with a wide range of engineering services.

Our small business model gives us the capacity to focus in on client projects and be responsive to your questions and requests. We are committed to helping clients find successful and cost efficient development solutions.

• Drainage Evaluation & Design

• Stormwater BMP Design

• Erosion Control Design

• Low Impact Development

• Engineering Reports

• Flow Control & Water Quality Design

• Sewer System Design

•Site Grading & Earthwork

•Street & Roadway Improvements

• Cost Estimating

• Hydraulic & Hydrologic Analysis

Rainier Stormwater Engineering has the experience needed for the successful delivery of our clients’ vision.

• Development Feasibility Assessment

• Local, State, and Federal Permitting Experience

• Permit Coordinator

•Peer Review

“It was a great pleasure to work with Rainier Stormwater. Ben is very knowledgeable and kept in touch throughout the entire process. They delivered a top quality plan, right on time, for the right price.”
       – Matt S.

“During a building permit submission to King County, the reviewer wanted several things revised and corrected for my residential drainage plan. I hired Rainier Stormwater (Ben and Tyler) to help me with this. They reviewed all my submitted documents and revised them, created new engineering documents, site plans, drainage plans, etc. The process took only a few weeks to complete. I just heard that the county has accepted the new documents so I am very happy with the work that was done. Highly recommend!”
       – Don P.