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1 <br />' Annual Hydrology Report <br />April 26, 1988 <br />Page 16 <br />' Panel 1W3S <br /> rzcelopment mining in panel 1W3S began in March, 1987. At the end of water <br />' year 1987, Panel 1W3S was developed to approximately 24 crosscut. Wet/damp <br /> roof areas were encountered from approximately ll crosscut to 24 crosscut. <br /> These wet areas produced no measureable inflows but were fairly extensive <br />' over a wide area. This water is thought to be a general trend in this area <br /> associated with sandstone channels directly above the coal seam and with <br /> Ivne Pine Gulch features. Exhibit II shwas the wet areas. <br />' 1W35 panel may encounter some additional wet areas, but they should be <br /> minimal as the development proceeds south out of the Lone P ine Gulch <br />' influence. <br />encountered Once retreat mining occurs, some additional wate <br />as subsidence affects the strata directly above the r may be <br />coal. If <br /> flow is encounteced is it likely it will be on the order of that <br /> encountered in 1W2S panel. <br /> T <br /> Panel 1W4S <br /> Development mining was begun in panel 1W4S in October, 1987. FSchibit II <br />' shwas wet and damp areas in this panel as well as mining up to the date of <br /> writing of this report. As in adjacent panel 1W3S, 1W4S is exhibiting the <br />' general trend associated with the sandstone channels and associated Lone <br />Pine Gulch features. <br /> It is anticipated that panel 1W4S will encounter additional wet and/or damp <br />' areas as it is advanced beneath Lone Pine Gulch. Water encountered should <br /> be in the form of roof drips, wet ribs, and damp floor. It is not expected <br /> that any significant flows will be encountered in development during 1988. <br />' 1st East Submain <br /> Development mining in the 1st East Submain from 13 crosscut to 16 crosscut <br />' was done in 1987. Water was encountered in the 1st East Submain and is <br /> thought to be associated with Sylvester Gulch features in the area. A sump <br /> was driven to the North between crosscuts 14 and 15 to collect water. No <br />' flows were measurable but they are estimated to be 2 to 3 gallons per <br /> minute. A pipe will be installed from the sump to connect with the pipe <br /> which pumps out portal No. 2 and into ~~-1. <br />' Development mining which advances the 1st East Submain will likely <br /> encounter additional water in the topographic transition and under 1a~ <br /> Dover beneath Sylvester Gulch. If necessary, this water will be pumped out <br />' Portal No. 2. It is thought that, although the area is wet, no <br /> significantly large flows will be encountered. <br />' Samples to date indicate water quality in the mine to be good and should pose no <br />problem for discharge. The ultimate discharges should readily meet NPDES <br />effluent limitations after settling and there should be no measureable impact to <br />' receiving waters. Quality of water discharged should be similaz to 1987 as <br />sham in Tables 1.4-1, 1.4-2, and 1.4-4. <br />1 <br />