Watershed Science & Engineering, Inc.
The best-documented Pacific Northwest floodplain firm found: the Chehalis River hydraulic model is theirs, confirmed in the Office of Chehalis Basin's own final report, in the state ecology department's records, and independently in a competitor's submittal to another county.
Credentials & verification
Services
Service area
Seattle WA · Puget Sound · Chehalis River Basin · King County · Washington · Oregon
Our verification notes
A credential gap worth flagging: the firm names its two senior people only by first name on its own site. Their full names were recovered from a county consultant roster and a public solicitation list, so the identification is sound, but neither is published anywhere with a PE number or CFM designation - so we print no credentials after their names. An older email address circulating in a 2016 county roster is treated as stale.
Sources checked
- https://officeofchehalisbasin.com/wp-content/uploads/2015/09/Hydraulic-Model-Report_Final.pdf
- https://www.ezview.wa.gov/Portals/_1492/Documents/Final%20Draft%20Work%20Plan%20Complete.pdf
- https://www.clallamcountywa.gov/DocumentCenter/View/393/Shannon-Wilson-Inc-PDF
- https://www.co.cowlitz.wa.us/DocumentCenter/View/9873
Last verified 2026-08-13. This is an independent listing, not an endorsement, and we are not affiliated with Watershed Science & Engineering, Inc.. Confirm the current license, insurance and references directly before signing any contract.