Our Clients

Below is a list of some of the clients and partners we have worked with.

Public Agencies



City of Aberdeen

City of Anacortes

City of Arlington

City of Bellevue

City of Black Diamond

City of Bothell

City of Burien

City of Chehalis

City of Des Moines

City of Duvall

City of Edmonds

City of Ellensburg

City of Everett

City of Federal Way

City of Gig Harbor

City of Issaquah

City of Kenmore

City of Kent

City of Kirkland

City of Lake Stevens

City of Lakewood

City of Lynnwood

City of Marysville

City of Mercer Island

City of Mill Creek

City of Monroe

City of Mountlake Terrace

City of Mukilteo

City of Olympia

City of Puyallup

City of Renton

City of Sammamish

City of Sammamish

City of Seattle

City of Shelton

City of Shoreline

City of Sumner

City of Tacoma

City of Tukwila

City of Tumwater

City of Walla Walla

City of Wenatchee

City of Woodinville

City of Yakima

King County

Kitsap County

Kitsap County

Klickitat County

Mason County

Orcas Island

Pierce County

Port Angeles

Port Gamble

Port Hadlock

Port Ludlow

Port of Everett

Port of Tacoma

Port of Vancouver

Port Orchard

Port Townsend

Seattle Department of Transportation (SDOT)

Skagit County

Snohomish County

Vashon Island

Washington State Department of Transportation (WSDOT)

Whidbey Island

Yakima County

Engineering Firms






Brown and Caldwell

CH2M Hill Inc.

CHS Engineers, Inc.

CM Design Group

David Evans and Associates Inc.


Gray & Osborne

HDR Engineering

Herrera Environmental Consultants


KBA Inc.




Macleod Reckford

Murray Smith and Associates

Osborn Consulting Inc.




Reid Middleton

RH2 Engineering

SCJ Alliance



Tetra Tech


TY Lin International



WSP | Parsons Brinkerhoff

Private Developers


Polygon Homes


United States Embassies


Sri Lanka

Kabul, Afghanistan

Santa Domingo, Dominican Republic

Djibouti, Republic of Djibouti

Tijuana, Mexico

Sarajevo, Bosnia

21312 30th Drive SE, Suite 110, Bothell, WA 98021 | 425.774.0106                                  © 2016 HWA GeoSciences, Inc.

  • Instagram Social Icon
  • Facebook Social Icon