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= Barr Engineering Company LOG OF PIEZOMETER <br />BARR (Reference Boring No. B-4) <br />Sheet 1 of 2 <br />Location. West Elk Mine, Somerset, <br />client: Mountain Coal Company <br />CO <br />Barr Project Number 06/261003 <br />Surface Elevation: 6386.90 <br />Top of Casing Elevation: <br />STRATA <br />PIEZOMETER <br />= <br />o <br />PIEZOMETER CONSTRUCTION DETAILS <br />~ <br />m <br />DETAILS <br />w r <br />> <br />FOR <br />DESCRIPTION a. x <br />o v <br />N <br />° <br />W <br />VIBRATING -WIRE SENSOR WITH SAND PACK <br />PROTECTIVE CASING <br />Diameter 6" <br />Type: 6" square 5' long <br />Interval: -3'2" to 2'8" bgs <br />0 <br />CLAY (CL -CH) Brown <br />slightly mist clay with <br />silt, sand and gravel. <br />Minor brown /black coal <br />3.34" <br />seaming and sandstone <br />fragments. <br />s <br />GROUT <br />Type: Bentonite <br />Interval. <br />SEAL <br />Type <br />Interval: <br />10 <br />SANDPACK <br />Type, <br />Interval- <br />VIBRATING-WIRE TIP <br />Diameter: 0.75" <br />15 <br />15.6 <br />TVT <br />6371.30 <br />Type- Slope Indicator <br />Serial No.: 99452 <br />16.6 <br />6370.30 <br />CLAYEY SAND (SC) 20 <br />Brown slightly moist <br />clayey sand with silt. <br />25 <br />•• <br />SANDSTONE Tan to <br />medium brown <br />sandstone mottled with <br />coal dust seams. <br />SANDSTONE Medium <br />brown sandstone with <br />minor clay and coal dust <br />:: <br />Got square casing from MCC. <br />Completion Depth: 35.0 <br />Date Started: 6/22/09 <br />LEGEND TPC TOP OF PROTECTIVE CASING <br />Date Completed: 6/22/09 <br />BC BASE PROTECTIVE CASING <br />WATER LEVELS <br />Logged By: BSE <br />a FILTER PACK GS GROUND SURFACE <br />Drilling Contractor: H <br />BS BENTONITE SEAL <br />® BENTONITE <br />WATER LEVEL: -T DRY ft <br />Drilling Method: HSA/C A/CORE <br />FP FILTER PACK <br />® CEMENT GROUT TVT TOP VIBRATING -WIRE TIP <br />DATE: 09 -21 -2009 <br />Coordinates <br />North: 402656.1 <br />BVT BOTTOM VIBRATING -WIRE TIP <br />® CUTTINGS / BACKFILL TD TOTAL DEPTH <br />TIME: 00:00 <br />East: 1450507.7 <br />ne straui ic:auon nnes represent appropmate Dounaanes. i ne iransaion may ae graoual. <br />