State releases report on Rush Springs aquifer

A study of the Rush Springs aquifer in southwest Oklahoma has been finished and released by the Oklahoma Water Resources Board.

The study was the result of a mandate by state law to determine what is called the “maximum annual yield” or MAY and equal proportionate share within the basin. The new report details the findings of the Rush Springs hydrologic investigation and provides information for construction of a groundwater-flow model to allow the OWRB to simulate various groundwater resource management scenarios.

The Rush Springs aquifer consists of the Permian-age Rush Springs and Marlow Formations, which are described as fine-grained sandstones and siltstones with some gypsum and dolomite.

The study area includes 4,692 square miles in west-central Oklahoma, underlying portions of Blaine, Caddo, Canadian, Comanche, Custer, Grady, Stephens, and Washita counties.

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