OUR CLIENTS

GSA's clients range from federal and local agencies to the largest mining companies in the world. Over 90% of our work is for repeat or referral clients, direct evidence of our focus on technical excellence and relationship building. The following list represents some of GSA's clients.

+ Federal Government

US Environmental Protection Agency
US Fish and Wildlife Service
U.S. Bureau of Reclamation, Upper Colorado River Region
Pacific Northwest National Laboratory (USDOE)
U.S. Army Corps of Engineers, Albuquerque District
U.S. Army - Fort Huachuca Garrison
U.S. Bureau of Indian Affairs
U.S. Bureau of Reclamation, Lower Colorado River Region
U.S. Bureua of Reclamation Technical Services Center
U.S. Department of Energy

+ Local / State / Tribal Governments

Arizona Game and Fish Department
Confederated Tribes of Warm Springs, Washington
Hualapai Tribe, Arizona
Truckee Meadows Water Authority, Nevada
Pueblo of Isleta, New Mexico
Pueblo Sandia, New Mexico
San Xavier District, Arizona
Stanislaus County, California
Hopi Tribe, Arizona
Havasupai Tribe, Arizona
Arizona Department of Water Resources
City of Chandler, Arizona
City of Phoenix, Arizona
City of Santa Fe, New Mexico
City of Sierra Vista, Arizona
Cochise County, Arizona
Klamath Water and Power Agency
New Mexico Interstate Stream Commission
Nye County, Nevada
Orange County Water District, California
Pima County Flood Control District
Tohono Oodham Nation
Tucson Water
US Air Force - Davis - Monthan Air Force Base
Walla Walla Watershed Council
Wasco County Soil and Water Conservation District
Yakima Nation

+ Mining Companies

American Vanadium
Barrick Gold Bald Mountain Mine
Barrick Gold Corporation
Barrick Gold Cortez Gold Mine
Barrick Gold Goldstrike Mine
Barrick Gold Mclaughlin Mine
BHP Billiton Base Metals
BHP Billiton North America
BHP Billiton Olympic Dam
BHP Billiton Pinto Valley
BHP Billiton San Manuel
Compañía Minera Antamina
Compañía Minera Cerro Casale
Compañía Minera Cerro Colorado
Compañía Minera Spence
Freeport-McMoRan, Inc.
Freeport-McMoRan - Sierrita
Freeport-McMoRan Copper Queen Branch
Freeport-McMoRan Miami
Freeport-McMoRan Morenci
KGHM Carlota Mine
KGHM Robinson Mine
Kinross Round Mountain Gold
Minera Barrick Misquichilca – Lagunas Norte
Minera Barrick Misquichilca - Pierina
Minera Escondida Limitada
Newmont Mining Corporation
Ok Tedi Mining Limited
Queenstake Jerritt Canyon Resources
Rio Tinto Technology and Innovation
San Xavier District, Tohono Oodham Nation
Sinclair Oil
Sociedad Minera Cerro Verde
Tethyan Copper Company

+ Industry and Technical Firms

AECOM
Amec Foster Wheeler
Arcadis
Arizona Public Service
Bohannan Huston, Inc.
Gulf South Research Corporation
HDR Engineering
Interfluve
JE Fuller
Kennedy/Jenks
MWH Global
Parametrix
Pinnacle West Capital Corporation
Renewable Resources Group
Salt River Project
Sempra Energy
Sinclair Oil
Stantec
Stone Environmental
URS Corporation
Western Development and Storage
Westland Resources

+ Non-Profit Organizations

Inland Empire Resource Conservation District, CA
Rio Grande Restoration
The Nature Conservancy
The Sonoran Institute
Upper San Pedro Partnership