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Hydraulic properties of the Ironton and Galesville sandstones, Shakopee Mdewakanton Sioux Community, southeastern Minnesota, 2004

Scientific Investigations Report 2005-5245

Prepared in cooperation with the Shakopee Mdewakanton Sioux Community
By:

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Abstract

The U.S. Geological Survey, in cooperation with the Shakopee Mdewakanton Sioux Community, conducted an aquifer test December 6–22, 2004, to improve definition of the hydraulic properties of the Ironton and Galesville Sandstones beneath the Shakopee Community in southeastern Minnesota. Three wells were used in the aquifer test—a production well and two observation wells, located 3,247 feet northwest of the production well and 3,049 feet southeast of the production well. The production well, completed in the Ironton and Galesville Sandstones, was pumped at about 600 gallons per minute from 10:30 a.m. on December 6, 2004, to 3:26 p.m. on December 9, 2004. Drawdown and recovery water levels were measured in all three wells.

Four curve-fitting methods and two graphical methods were used to estimate the transmissivity and storage coefficient of the Ironton and Galesville Sandstones. The four curve-fitting methods were the Theis, Hantush, Hantush-Jacob, and Neumann-Witherspoon methods. These methods were applied to the drawdown and residual recovery curves of the observation wells. The two graphical methods were the Cooper-Jacob method and the Theis recovery method. The Cooper-Jacob method was applied to the drawdown curve of the production well and the drawdown curves of the two observation wells. The Theis recovery method was applied to the residual drawdown curves of the two observation wells.

The transmissivity estimated using the six methods ranged from 450 to 650 feet squared per day. The average transmissivity for the six methods was 540 feet squared per day. The storage coefficient estimated using the six methods ranged from 4.2 to 5.7 x 10-5. The average storage coefficient for all six methods was 5.0 x 10-5. The hydraulic conductivity was estimated by dividing the estimated transmissivity by 45 feet. The average hydraulic conductivity for the six methods was 12.1 feet per day.

Study Area

Additional publication details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Hydraulic properties of the Ironton and Galesville sandstones, Shakopee Mdewakanton Sioux Community, southeastern Minnesota, 2004
Series title:
Scientific Investigations Report
Series number:
2005-5245
Year Published:
2005
Language:
English
Publisher:
U.S. Geological Survey
Publisher location:
Reston, VA
Contributing office(s):
Minnesota Water Science Center
Description:
iv, 30 p.
Country:
United States
State:
Minnesota
County:
Scott County
Other Geospatial:
Shakopee Mdewakanton Sioux Community
Online Only (Y/N):
Y
Additional Online Files (Y/N):
N