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~~~,,,~« <br /> <br />Wellheads were set up for water level measurement with <br />either water level measuring tapes or water pressure gauges. <br />3.3 Details of [1e11 Construction <br />The following section provides specific details of <br />the construction procedures for each well. Information on con- <br />struction procedures and problems, drill cuttings, geophysical <br />logs, and test intervals is included. For all three well sites, <br />the deepest well is number 1, and the shallowest well is num- <br />ber 3. <br />3.3.1 We11 Site GF <br />We11 GF-1 <br />• We11 GF-1 was initially drilled with 6-3/8 and 6-inch <br />bits. Drill cuttings from the Upper Williams Fork Formation <br />showed stratigraphically complex beds of shale, siltstone, sand- oN'~2 <br />2 <br />stone, and coal six inches to ten feet thick. Fine, white sand T°P <br />from the Twenty Mile Sandstone first appeared between 590 and <br />600 feet. Drilling was stopped at 640 feet. The well began to <br />' flow at 5 to 10 gallons per minute (gpm). <br />Geophysical logs were obtained for the entire 640 feet. <br />Figure 3-4 displays the geophysical logs for We11 GF-1. <br />The first two attempts to install casing were unsuc- <br />cessful. Casing and tremie pipe sections were accidentally Lost <br />down the hole on the first attemoc. These sections could not <br />be fished out, and it was necessary to drill out the lost hard- <br />ware. On the second attempt to install casing, the casing jammed <br />in the hole. A 7-7/8 inch bit was then used to enlarge (ream) <br />• <br />3-9 <br />