Laserfiche WebLink
<br />• Background: The mining of Panels 13 Right through 16 Right will result in subsiding segments of <br />Fish Creek and its alluvial valle}' floor. The monitoring program will be used to evaluate the <br />following: alluvial water quality and elevation surface water quality and flow and stream gradient and <br />ponding. Each will be discussed below. <br />Allu~zum <br />TCC will utilize the existing P & M alluvial wells to obtain water level and quality data in the NMD. <br />Additionally, TCC will use existing upstream and downstream wells as conditions allow. <br />]n reference to 13 Right, an upstream alluvial well will be installed at least one yeaz prior to the <br />longwall mining witltirt ],000 feet of the AVF located over this panel. The well will be located in the <br />SW/4 SE/4 of section ]7, TSN, R86W. The well will be installed during the period of June through <br />August 2001. It will be monitored quarterly for water level and field parameters, and semi-annually <br />for full suite pazameters. A downstream well for this panel will be established in the NW/4 NE/4 <br />of section 15, TSN, R86W. This well will be installed at the same time as the upstream well, and will <br />be monitored at the same frequency and for the same parameters as the upstream well. <br />In reference to Panels 14 Right through 16 Right, only a downstream well will be installed for <br />monitoring purposes. The new down stream well will be constructed in the NW/4 SW/4 of section <br />11, TSR, R86W. The well will be installed at least one year prior to mining within 1,000 feet of the <br />A~~F located over the 14 Right panel. The 13 Right Panel downstream well will be used as the <br />upstream well for Panels 14 Right through ] 6 Right It will continue to be monitored as previously <br />discussed. The well to be established in section 11 will be monitored as per the previously described <br />• schedule. <br />In reference to the 13 Right Panel downstream well, which will become the upstream well for Panels <br />14 Right through 16 Right it will subside as a result of mining. In order to understand the elevation <br />change from the initial base survey it will be surveyed after longwall mining has been completed to <br />obtain an updated top of case elevation. This will be used as the datum for deterr*~inir,g the water <br />elevation in the well from that point forward. <br />Surface Water <br />An upstream station on Fish Creek will be established at least one year prior to longwall mining <br />within 1,000 feet of the AVF located over the 13 Right panel. It is anticipated that the station will <br />be located near the upstream alluvial monitoring well installed in Section 17. The station will be <br />monitored quatterly for flow and semi-annually for Geld and full-suite pazameters. Additionally, the <br />site will be gaged periodically during low flow periods to establish a rating curve for the site. At the <br />time the gage is installed the stream will be rated to provide a stream elevation with the discharge <br />and gage reading. The stream will be rated two more times prior to November to further develop <br />the rating curve. Once this is done the station will be rated annually after spring runoff to continue <br />development of the rating curve. A downstream site for the ] 3 Right panel will be established in the <br />NW/4 NE/4of section 15, TSN, RSGW. It will be installed during the same period as the upstream <br />site and monitored at the same frequenry. Also, the same rating procedure will for followed for this <br />station as the described above. <br />After mining has been completed in 13 Right the downstream site will move to the north of the next <br />• panel to be mined. This will continue until Panel 1G Right has been mined. The "moving" <br />downstream station will be installed at least one year prior to mining within 1,000 feet of the AVF <br />PR99-OS 03/28/00 <br />