Development of groundwater resources for Indian tribes in the west revolves around Winters Doctrine rights and the McCarran Amendment, which established Practical Irrigable Acreage (PIA) as the yardstick to quantify water rights. PIA claims are a complex interrelationship among economic, hydrogeologic, market, agricultural, and soil scientists to jointly develop appropriately scaled and economically viable irrication projects. Hydro Geo Chem, Inc. has extensive experiece in providing expert services to resolve water rights disputes.

Water Resources Assessment and Water Rights Adjudication
Navajo Nation, Arizona

Hydro Geo Chem was retained to conduct several groundwater resource assessments and impact studies within the complex Little Colorado River Basin of Arizona, a 27,000 square mile watershed (extended project description).

Development of Quantified Water Rights
Mescalero Apache Reservation, New Mexico

Hydro Geo Chem performed a hydrologic evaluation of a proposed wellfield on the Mescalero Apache Indian Reservation, a source area for the Roswell Groundwater Basin (extended project description).


51 West Wetmore Road, Suite 101, Tucson, Arizona 85705-1678

Toll Free (800) 727-5547, Tel. (520) 293-1500, Fax (520) 293-1550, Email contact@hgcinc.com

3038 East Cactus Road, Suite 3, Phoenix, Arizona 85032-7113
(480) 421-1501, Fax (480) 425-8794
Hydro Geo Chem, Inc. assumes no responsibility for the consequences of reliance by others on the
information provided on this web site
Copyright © 2021 - by Hydro Geo Chem, Inc., all rights reserved