Laserfiche WebLink
Table J <br />Table G-27 Modified in Response to 784.14(b)(1) <br /> <br /> <br /> <br />STREAMFLOW DEPLETIONS <br /> <br />(a) (b) (c) <br />Infiltration of <br />Interrupted Surface Water <br />Coal Ground Water Through Total <br />Seam Outflows streambed Depletion <br />G 1,400 gpd <br />P 5,600 <br />J 400 <br />FF 8,800 <br />TOTALS 16,200 gpd <br />3,000 gpd <br />190 <br />4,800 <br />200 <br />8,190 gpd <br />5.7 gal/min <br />4,400 gpd <br />5,790 <br />5,200 <br />9,000 <br />24,390 gpd <br />11.2 gal/min <br />16.9 gal/min <br />27.1 of/yr <br />(a) Interrupted ground water flow from the coals and fractured <br />overburden sandstoness to the creek is equal to the amount of <br />water that flows to the creek through a 200-foot section of <br />the streambed. This 200-foot section represents the approximate <br />width of the Curtis Creek valley. That is 200 feet times the <br />unit flow in the combined coal and sandstone (see Tables D and <br />H). <br />(b) Infiltration of surface water through the streambed will be <br />controlled by the lower hydraulic conductivity of the combined <br />coal and sandstone, times the flow gradient which will be the <br />thickness of the combined coal and sandstone divided by the <br />hori~ontnl. dLstnncc of. the mi.necl portion of the coal from the <br />subcrop of the combined coal and sandstone times the width of <br />the Curtis Creek valley. (See Tables D and I and Figure A). <br />472NCC02 <br />