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 Hatchery

Primary Investigator: Doug Maurer

Well Data

USGS Site ID
Local Name Altitude Uppermost
Opening
Lowermost
Opening
Primary Aquifer Transmissivity
(ft2/d)
385338119415801 Hatchery#3 4901 90 440 ALLUVIAL FILL 2000

 

Aquifer Test

All Aquifer Test Files (zip)

Hatchery

Aquifer Test (pdf)

A single-well step-drawdown test was conducted by M. Mifflin of the Desert Research Institute and N. Sievertson of the U.S. Fish and Wildlife Service. The well is completed in the basin-fill aquifer of Carson Valley, Nevada. Copies of time-drawdown and pump data were obtained from USGS historic files for the Carson Valley Hydrographic Area. 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 for the test varied from 460, 580, 820, 970, 1,200, and 1,500 to 1,600 GPM for periods 1 to 2 hours on 12/14/63. Flow rates greater than about 1,200 GPM after 6PM appear uncertain and these data were not used in the analysis. Water-levels were measured with an electric tape and flow-rate measurements were made with a rated orfice place, accurate to flow rates of 1,200 GPM. A correction for measurements made with the electric tape was applied from comparisons with a steel tape made after the test. Data sheets show that flow rates were variable during each step. The location of discharge of pumped water, and pre-test water-level trends are not known.

Results of the test indicate a hydraulic conductivity and transmissivity of 10 ft/day and 7,000 ft2/day, respectively.

 

 

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