Laserfiche WebLink
<br />• The two track access to LW2-1 from LW2-2, is about 1/2-mile long. Part of the track is constructed <br />around the side oT a hill necessitating approximately 60 feet of the track to have a cut ranging up to <br />6 feet deep. The track width is maintained around 12 feet. The only disturbance of any significance <br />was for the cut to be made on the side of the hill. Some rock blasting was required. The blasting <br />job and earthwork was contracted. The access route constructed was waterbarred to prevent erosion <br />until abandonment. An 18-inch culvert was installed on the access road to well tILW2-1. <br />In April 1989, it was discovered that due to a surveying error, the venthole LW3-2 was drilled in the <br />wrong place. The current location should have been about 120 feet north oT the drilled location. The <br />drilled hole LW3-2 and another replacement hole LW3-2 will be drilled during the 1989 drilling season. <br />The drill sites are about 60' x 80'. A site is formed by removing about one Toot of topsoil. The topsoil <br />is stockpiled at one end of the drill site. Minimal other earthwork is required since the drill sites are <br />relatively flat. Two temporary mud pits are constructed at the lowest elevation of the drill site. All <br />suitable topsoil material is salvaged from the mud pit areas and placed in the topsoil stockpile. The <br />mud pits is about 20' x 10' x 6' each. Any runoff water and/or water/drilling mud mixture is generally <br />collected in the mud pit. The mud pits effectively serve as the sediment control structures for the <br />disturbance during drilling. Sediment conVOl of the drill pad area is also achieved by one or more <br />ditch-berm constructed for the purpose or by installing silt fence or sVaw bales. During the grazing <br />period from December 1 through May 15, the mud pits will be left in a reasonably dry condition <br />• following the completion of a well so they do not pose a hazard to sheep. Otherwise the pits will be <br />fenced with woven wire. After drilling and construction completion, any water in the mud pits that has <br />not evaporated is trucked to the coal refuse disposal area and placed in pond RP-1. <br />Upon successful drilling and hole completion, the overburden from the mud pits is backfilled and <br />smoothed out. The disturbed area (drill site and mud pits) is ripped to a minimum depth of one foot <br />below grade prior to topsoil replacement. Stockpiled topsoil is spread evenly back over the disturbed <br />site. Sediment control of the disturbed area will be maintained during revegetation according to the <br />measures described above. The fall seeding mixture, shown in Table V-13, is broadcast seeded and <br />raked in. Access to the hole is necessary for approximately one year to monitor the success of the <br />de-gassing effort. Access roads that may be used during drilling and monitoring of vent holes will be <br />scarified and reseeded next fall, if such access is no longer required. <br />u <br />(Rev. 8/92) III-36 <br />