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Ground-water appraisal in northwestern Big Stone County, west-central Minnesota

Open-File Report 80-568

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Abstract

Test augering south of Beardsley, Big Stone County, Minn., outlined a small surficial aquifer that consists of outwash deposits of sand and gravel. The aquifer is elongate, trending northeast-southwest, with a maximum saturated thickness of 42 feet and an areal extent of about 5 square miles. Deep test drilling showed that small buried outwash aquifers occur over much of the project area. A major buried outwash aquifer east of Beardsley consists of 130 feet of fine, uniform quartz sand. It lies in a steep-sided northwest-southeast trending valley eroded in bedrock and is overlain by 130 feet of clayey till. Pumping-test results indicate that transmissivity of the aquifer ranges from about 11,000 to 13,000 feet squared per day, and the storage coefficient ranges from 0.0001 to 0.002. Significant differences were found in chemical quality of water from the buried outwash and Cretaceous aquifers. Water from Cretaceous aquifers is softer than water from outwash aquifers, but contains concentrations of sodium and boron that are high enough to damage soils and crops if used for irrigation. Nitrate concentrations exceeded the Minnesota Pollution Control Agency 's recommended limits for drinking water in one sample from the surficial aquifer. (USGS)

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Ground-water appraisal in northwestern Big Stone County, west-central Minnesota
Series title:
Open-File Report
Series number:
80-568
Edition:
WRI/OFR
Year Published:
1980
Language:
ENGLISH
Publisher:
U.S. Geological Survey,
Description:
v, 46 p. ill., maps ;26 cm.