2018-04-18_PERMIT FILE - C1981022A ‎(2)‎

• Permit No: C1981022A
• IBM Index Class Name: Permit File
• Doc Date: 4/18/2018
• Doc Name: Borehole Abandonment Reports
• Section_Exhibit Name: Exhibit 2.04-E3 Tab I/Item 9
• Media Type: D
• Archive: Yes

Oxbow Mining LLC
Elk Creek Mine
Hole Number: GVB 17-02 Project ID.: Elk Creek Mine Gob Vent Boreholes
Lease Number: COC -61357 (State or Federal) Surface Owner: Hotchkiss
Date Commenced: 27 -Oct -10 Date Completed: 6 -Nov -10
Contractor: Himes Drilling
Rig Type: Atlas Copco RD20
Geologist: Doug Allen
Date :
5 -Dec -10
Toolpusher: Matt Himes
Driller: Jim Weatherton
Truck Driver:
Kirk Homedew
Helper: Richard M.
Sam Homedew
Will Juusola
Trey H,
Coordinates: N. 18046.12
E.
34286.94
Location: Township, Range & Section:
SW 1/4, Sec. 31, T. 12 S., R. 90 W.
Ground Elevation: 8143'
Collar Elevation:
Geophysical Log Measured From:
ground
Elevation
Total Depth: 2290'
Probe Depth:
2292'
Fluid Level: NA
Casing Type: steel T&C
Size:
9 5/8"
Casing Type: sol/slot steel T&C
Size:
7"
Depth: 0-2152'
Recovered (Y or N):
N
Depth: 2101-2254'
Recovered (Y or N):
N
Bit Information
Surface Casing 16" Tricone to 20' (14"
surface casing)
Main Hole 121/4" PDC from 20-2152'
Core:
Bottom Hole 8 3/4" Tricone from 2152-2290'
Footage Plugged: 0-2290' Cored: NA
Drilling Medium: Air: Foam (Water: Mud: Foam Injection:
Depths: 0-480' 480-2290'
Lost Circulation Depths: NA Regained ? (Y or N):
Water Invasion Depth or Intervals: NA Estimated Inflow Rates:
Gas Invasion Depth or Interval: NA
Geophysical Logging Contractor: Jetwest Geophysical
Logs Run: Gamma: Y Neutron:
Temperature: Density: Y
Resistivity: Y Caliper: Y
Other (SP, Foc. Elec., Drift, Dep., Sonic): cement dump bailer/ Gas gun
Hole Cemented (Y or N ), Type: N No. of Bags:
Interval:
Coal Core Sent To: NA Rock Sent To: NA
Comments: 7" casing overlaps 51' inside 9 5/8" casing. 9 5/8" annulus cemented
with 5 yds neat cement slurry. Tagged gravel at 2262', tagged cement plug at 2254'.
Optical borehole imager (fracture log) run to 1900' before cuttings/ foam clouded image.
Ran three gasguns: 4' @2244-2248' (D2 rider); 10' @2220-2230' (siltstone) and
10' @2200-2210' (siltstone) to stimulate methane flow ahead of longwall.
9 5/8" casing abandoned to surface with 31 cubic vards Portland cement slurry Sent.. 2012.