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C153514 Feasibility Study
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C153514 Feasibility Study
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Last modified
11/19/2009 11:22:24 AM
Creation date
10/5/2006 11:54:38 PM
Metadata
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Template:
Loan Projects
Contract/PO #
C153514
Contractor Name
Farmers Water Development Company
Contract Type
Loan
Water District
60
County
San Miguel
Bill Number
SB 87-15
Loan Projects - Doc Type
Feasibility Study
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<br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br />I <br /> <br />were interpreted and converted to equivalent permeability <br />measurements using equations developed by the U.S. Bureau <br />of Reclamation and presented in their publication titled <br />Earth Manual. The locations of the packer permeabil ity <br />tests and the associated calculated permeabilities are <br />shown on Figure 6. <br /> <br />Standpi pe pi ezometers of two- inch di ameter PVC pi pe <br />were installed in every borehole except BH-5 following <br />completion of the packer permeability tests. The <br />piezometers installed in boreholes BH-l, BH-2, BH-3, BH-4 <br />and BH-6 were constructed to monitor groundwater levels <br />within the bedrock foundation of the dam. The piezometers <br />installed in boreholes BH-7 and BH-8 were constructed to <br />monitor groundwater levels within the embankment. <br />Piezometer completion diagrams showing materials of <br />construction and pertinent depths are included in <br />Appendix C for each of the standpipe piezometers. <br /> <br />Following completion of the standpipe piezometers, <br />falling head gravity inflow permeability tests' were <br />conducted in each of the piezometers to determine the <br />average permeability. of the bedrock formation to be <br />monitored. These tests were conducted us i ng cl ean water <br />as the injection liquid. The position of the water <br />surface in the standpipe versus time was monitored using <br />a transducer and data logger equipment combination. The <br />test data was interpreted and converted to equivalent <br />permeability measurements using equations and analytical <br />methods developed by the U.S. Army Corps of Engineers <br />Waterways Experiment Station and presented. in the <br />publication titled Time Lag and Soil Permeability In <br />Ground - Water Observations authored by Juu1 Hvorslev. <br />The locations of the standpipe permeability tests and the <br />associated calculated permeabilities are shown on Figure <br />6. <br /> <br />-8- <br />
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