Nevada Water Science Center


Aquifer Tests

Contact Information

Phil Gardner
Groundwater Specialist
Phone: (775) 887-7664
Email:pgardner@usgs.gov

 

Mailing Address
USGS
Nevada Water Science Center
2730 N. Deer Run Rd.
Carson City, NV 89701

 

Nevada Water Science Center
Information

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Carson Valley Minden 4

Primary Investigator: Doug Maurer

Well Data

USGS Site ID
Local Name Altitude Uppermost
Opening
Lowermost
Opening
Primary Aquifer Transmissivity
(ft2/d)
385738119465301 Minden#4 4701 200 400 ALLUVIAL FILL 31000

 

Aquifer Test

All Aquifer Test Files (zip)

Minden 4

Aquifer Test (pdf)

A single-well constant-rate test was conducted by Sargent Irrigation Company of Reno, Nevada. The well is completed in the basin-fill aquifer of Carson Valley, Nevada. Copies of time-drawdown and pump data were obtained from files of Resource Concepts, Inc.(RCI), the engineering firm in charge of the water-supply system for the town of Minden (Bruce Scott, RCI, written commun. 2005). Results of the aquifer test will be used in the development of a numerical ground-water flow model in Carson Valley, project # 9705-BPS01. Specifically, the estimated transmissivity will be used to develop a relation between transmissivity and specific yield. The relation will then be used with data from driller’s logs to develop a preliminary distribution of transmissivity for the valley. The pump rate was 2,500 GPM for 24 hours from 7/17/86 to 7/18/86. After 5 PM, rates were decreased by various steps through 10:45 AM on 6/13/95. The well was flowing prior to the test with a static water level of 3 ft below land surface after the test. The methods of water-level and flow-rate measurements, location of discharge of pumped water, and pre-test water-level trends are not known. The well was reported completed on 7/18/86, and development of the well and a step-drawdown test likely took place a relatively short time prior to the test period. Time-drawdown data were analyzed using an Excel spreadsheet program (Halford and Kuniansky, 2002) and the Cooper-Jacob analysis. Results indicate a hydraulic conductivity and transmissivity of 83 ft/day and 31,000 ft2/day, respectively.

 

 

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