Teal Dreher, PE

Project Engineer

Teal dreher


Phone: 360-394-7917

Email: tdreher@dofnw.com

About Teal

Teal is a registered environmental engineer who has been working in the environmental industry since 2010. She has worked in both the public and private sectors of the environmental field and since joining DOF in 2012, Teal has worked on multiple projects as lead design engineer and project manager. She has designed various stormwater, dredging, and habitat improvement projects and she routinely performs the environmental permitting, cost estimating, and preparation of plans and specifications for construction bidding. She has also worked with clients to prepare stormwater documents, including DMRs and SWPPPs, and ensure regulatory compliance with Industrial NPDES permits.

Teal has performed the construction oversight on a variety of different sediment remediation and environmental projects, which involves working with the contractor to ensure that the project is executed per the design, troubleshooting any issues that may arise and helping find solutions to keep the work progressing, managing budgets, and working with agencies to ensure that all permit criteria is being met. This experience is invaluable when it comes to designing and implementing future projects and working with clients, contractors, and agencies to find the best solution for each scenario.

Technical Specialties

  • Construction oversight and quality control

  • Sediment remediation

  • Stormwater

  • Environmental sampling


  • M.S. Civil Engineering, South Dakota School of Mines and Technology

  • B.S. Environmental Engineering, South Dakota School of Mines and Technology, magna cum laude


  • Registered Professional Engineer – WA (52244), OR (93987)

  • HAZWOPER Certification


  • Fuglevand, P.F.; Webb, R.S.; Dreher, T.D., Environmental dredging productivity for precision excavator dredges, Proceedings of the Western Dredging Association and Texas A&M University Center for Dredging Studies, Dredging Summit and Expo 2015, Houston, Texas, USA, June 22-25, 2015

  • Dreher, Teal M. et al., Effects of chlortetracycline amended feed on anaerobic sequencing batch reactor performance of swine manure digestion, Bioresource Technology, Volume 125, Pages 65-74, December 2012

Speaking Engagements

  • Speaker, “Duwamish Waterway Early Action Implementation: Lessons Learned, NEWT, and Adaptive Management from the Engineer in the Cab ”, Dredging 2015, October 20, 2015

  • Speaker, “Northwest Oil Drain Canal: Sediment Remediation Using Bypass and Excavation ”, Western Dredging Association - Pacific Chapter. Waikiki, HI, October 2018