Trihydro is an engineering and environmental consulting firm committed to providing effective solutions. We approach each project as an opportunity to partner with our clients and build trust based upon successful outcomes. With project experience extending back to 1984, our professional engineers, geologists, scientists, designers, and regulatory experts understand how to take a strategic vision, turn it into a practical plan or design, and move it through project delivery. 

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Solutions you can count on

We offer comprehensive environmental services, engineering expertise, and technology solutions.
We focus on how each provided service factors into the bigger picture, so our solutions fully integrate into our clients' overall visions.

Our services

People you can trust

Trihydro has 500 people dedicated to service excellence. Our mid-size means
we have the expertise and manpower to provide project solutions, while still being small
enough to prioritize our individual clients' needs.

Our team

A cultural code

Trihydro's corporate code of conduct is based on a book titled Cowboy Ethics, What Wall Street Can Learn from the Code of the West by James P. Owen. The Code of the West has 10 tenets, and in 2017, Trihydro added one more: "Leave it better than you found it." Our cultural code underpins how we approach projects, relationships, and challenges.

code of the west

moving markets forward

The environmental and engineering services we provide benefit multiple markets. While the types of services we offer may be similar, each market's challenges are unique. Trihydro is committed to understanding each specific industry, market, and client in order to develop specific, fit-for-purpose solutions. 


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Featured Projects

Phase I Remedial Investigation for PFAS at Air Force Base

United States Air Force
Eareckson Air Station, Alaskan Aleutian Islands

Federal Government

Trihydro is completing an Air Force Civil Engineer Center Task Order for architect-engineering services to conduct remedial investigations (RI) for various sites at Eareckson Air Station, a United States Air Force military airport on the Alaskan Aleutian Islands. Situated 1,500 miles southwest of Anchorage and 400 miles from Russia, the Air Station lies at 98 feet above mean sea level on the south side of a 2-mile by 4-mile island.

Trihydro conducted a Phase I RI, which involved site characterization of per-and polyfluoroalkyl substances (PFAS) contamination at four site areas resulting from past aqueous film-forming foam (AFFF) use and development of a conceptual site model (CSM). Trihydro served as the task lead for on-island fieldwork, managing tasks such as:

  • Installing and developing groundwater monitoring wells at 13 locations
  • Sampling 45 existing groundwater wells
  • Collecting 31 surface water/sediment samples to assist in delineating PFAS contamination
  • Completing 135 soil borings with select, co-located temporary well groundwater samples to delineate PFAS impacts above the project screening levels in soil and groundwater
  • Testing 24 separate PFAS analytes in soil, groundwater, surface water, and sediment
  • Performing a synoptic groundwater gauging event of over 100 existing wells and then adding a scope element at no cost to the original contract to re-survey the 100 wells to confirm gauging data would meet the project goals

The project’s extreme remoteness provided early project challenges when a 15-foot Geoprobe 6620 drill rig suffered a head gasket failure. The project team worked quickly to mobilize a repair team and repair parts to the island. Following repairs to the drill rig, the project team worked an accelerated schedule to complete the project on time and within budget with zero safety issues.

The project team also worked proactively with the Air Force and the Alaska Department of Environmental Conservation to bring stakeholders together in the project’s planning phase, which streamlined later-stage regulatory reviews on the Uniform Federal Policy for Quality Assurance Project Plans (UFP-QAPP) and facilitated early conditional approval to execute the first groundwater and surface water sampling event prior to final QAPP approval. Applying a staggered field approach allowed the team to use insights from the data collected in early project stages to field-adjust later-stage sampling locations and minimize data gaps, making for the most efficient use of fixed resources. The Air Force project manager adopted the staggered approach as a Best Management Practice (BMP) for other RIs throughout Alaska.

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