1986-12-31_REPORT - C1981008 ‎(7)‎

• Permit No: C1981008
• IBM Index Class Name: Report
• Doc Date: 12/31/1986
• Doc Name: 1986 Annual Hydrology Report Appendix D ‎(Part 5 of 8)‎
• Annual Report Year: 1986
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

MONITOR WELL DRILLING AND CONSTRUCTION SUMMARY
NUCLA AND NUCLA EAST MINES
Monitor Well Name GW-N23(WM0023) Geologic Unit Monitored Overburden,Dakota Coal , and
Elevation Ground Level (ft-amsl ) 5744.57 Underburden
Location: N 604734,974 E 1,117074. 12 T 47 N R 16 W .S 36 A A D
Total Drill Depth (ft) 31.0
Total Well Depth ( ft) 29.6
Drilling Details
Borehole Diameter ( in) 5 1/4 to 14.0' ; 4 7/8 to 31.RigSpeedstar 1500
Bits Tricone and Core Driller Allan Chiles
Drilling Fluid Air
Additional Details Exploration Hole 873-C
Drilling/Construction: Start 04/20/36 Finish 04/20/86
Lithologic Log (Y/'N) Y
Geophysical Log (Y/N) N
Construction Details
Casing Specs : Blank 2" id PVC sch40 Perforated 1/8" saw slot
Perforated Intervals) 23.6 -29.6
Packer Set At 5.0'
Cement From �-,.C' To J,O,
Bentonite Slurry From NA To
Gravel Pack From NA To
Additional Details Dry Hole
Development Sunnnary
Comments , Problems Top of Lower Dakota Coal at 16.0' . Bottom of Lower Dakota Coal
_ at 23.6' .
D-21 Revised 11/01/86