1988-08-19_PERMIT FILE - C1981008A (2)

Home Browse Search

Page 1 of 1 MONITOR WELL LITHOLOGIC LOG Monitor Well Name GW-N24(WM0024)* Geologic Unit Monitored Overburden, Dakota Coal Drilling Date 04/21/86 Logged By G. Wendt and Underburden Geophysically Logged By None Total Depth Drilled (ft) 31 .5 *Exploration Hole 874-E DEPTH (FT) DESCRIPTION AND COMMENTS 0.0 - 0.3 SOIL, reddish brown, friable, ME/VE 0.3 - 2.0 SANDSTONE, light grayish brown to brown, extremely hard, VE 2.0 - 4.0 SHALE, gray, hard, SE/ME, extremely hard sandstone at 2.0 - 2.4 4.0 - 7.4 SHALE, very dark gray, slightly hard and soft black coal and carbonaceous shale (weathered Upper Dakota seam) , NE 7.4 - 9.0 SANDSTONE, light gray, slightly hard, gray shale at 7.4 - 7.6, NE 9.0 - 13.0 SANDSTONE, brown, slightly hard to hard, NE, sandstone strata continues to 13.2 13.0 - 15.7 SHALE, gray to dark gray, slightly hard to hard, NE, yellow sulfur stains in fractures, 50% light gray sandstone at 15.65 - 15.70 15.7 - 23.5 COAL, Lower Dakota seam, slightly hard light gray silty shale parting with yellow sulfur stains at 15.95 - 16.25, light gray silty shale streak at 17.36 - 17.44 and 17.53 - 17.57 23.5 - 23.9 SHALE, dark grayish brown, slightly hard 23.9 - 26.8 SANDSTONE, light gray, hard with 35% slightly hard gray shale streaks 26.8 - 29.2 SHALE, light gray and gray, soft to slightly hard, fractured 29.2 - 31 .5 SANDSTONE, light gray, extremely hard, fractured at 0.5 foot intervals 31 .5 TOTAL CORE SAMPLE DEPTH NOTES: Cuttings collected from 0.0 - 15.0 feet, 51/4 inch diameter hole 3 inch core from 15.0 - 31 .5 feet, 4 7/8 inch diameter hole 2 inch PVC casing installed to 31 .5 feet, slotted at 26 - 31 .5 feet, packer at 5.0 feet Dry Hole NE - Non Effervescent SE - Slightly Effervescent ME - Moderately Effervescent VE - Violently Effervescent 15-2-58 Revised 11/01/86