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<br />Site 5 - Craner Gravel Pit.-Dry Creek is also the water supply for this site. Water is <br />diverted from Dry Creek through an open channel to an existing inactive gravel pit. <br />Overflows from the gravel pit are diverted to the injection well. <br /> <br />e <br /> <br />The gravel pit serves as a sedimentation basin for the injection well. There is a weir <br />structure on the diversion to measure flows into the gravel pit. Another weir is incorpo- <br />rated into the diversion structure from the gravel pit to the injection well to measure flows <br />to the injection well. Both weirs are equipped with flow recorders. <br /> <br />The injection well was completed to a depth of 246 feet. The well drilling indicated <br />sediment and clay from 0-76 feet; sediments and sandy clay materials from 76-188 feet; <br />and sediments with more gravel and less sand from 188-246 feet. <br /> <br />Site 6 - Murtaugh Lake.-Snake River is the water supply for this site. The Twin Falls Canal <br />Company diverts water from the Snake River at Milner Dam into an open canal (capacity <br />3,000 cubic feet per second), which conveys it to Murtaugh Lake. Murtaugh Lake is an off- <br />stream irrigation reregulating reservoir. <br /> <br />l!l.~ PUII1P station ,"vas cop.structed on the west end of thp. la ke. A oioeline carries water to the <br />! ! - - .L I- <br />injection well sites. This lake effectively serves as a sedimentation basin for this recharge <br /> <br />site. The pump station also has a screening system to remove floating debris and other <br /> <br />materials in the supply water. <br /> <br />Three wells were constructed at this site. The first injection well was completed to a depth <br />of 708 feet to a receiving aquifer comprised of basalt rock formation. The second injection . <br />well is completed to a depth of 1,016 feet to a receiving aquifer formation composed of <br />rhyolite. The third injection well is completed to a depth of 340 feet. (Bore logs at this well <br />indicated sediments from 0-115 feet; basalt from 115-126 feet; sediments from 126-215 feet; <br />basalt from 215-256 feet; sediments from 256-288 feet; and basalt from 288-340 feet). All <br />wells were cased to a specific depth, with the lower portion of the well uncased. <br /> <br />Site 7 - Sturgil.-The Snake River is the water supply for this site. This site has similar <br />conditions as site 6, and project operations at this site benefitted from the insights gained at <br />site 6 to simplify the recharge system's use of underground pipe and construction methods. <br /> <br />The first injection well is completed to 11 depth of 555 feet (sediments from 0-28 feet; basalt <br />from 28-340 feet; sediments from 340-480 feet; and rhyolite from 480-555 feet). The second <br />injection well is completed to a depth of 369 feet. The observation well is completed to a <br />depth of 234 feet (sediments from 0-36 feet; basalt from 36-320 feet; and sediments from <br />320-384 feet). All injection wells had steel casing to a specified depth, and the rest of the <br />well was left as an uncased open well. <br /> <br />Project Operations <br /> <br />Table 1 summarizes the amount of groundwater recharge that was accomplished by the <br />project: <br /> <br />. <br /> <br />I ' <br /> <br />6 <br />