PERMFILE41424

• Permit No: C1980007
• IBM Index Class Name: Permit File
• Doc Date: 5/24/2005
• Doc Name: One Methane Drainage Well on Pad 24-05
• Section_Exhibit Name: Exhibit 80 Drilling Activities - MR308
• Media Type: D
• Archive: No

- ~•
it
MOUNTAIN COAL
/~ CQMPANY~~~.
A Subsidiazy ofArch Western Resources, t r r
May 23, 2005
". 11
R~CEe~~D
MAY 2 ~ ?OD5
division •/gginerafs and GeoingY
Mr. James Burnell
Colorado Division of Minerals and Geology (CDMG)
Office of Mined Land Reclamation
1313 Sherman Street, Room 215
Denver, Colorado 80203
West Elk Mine
P O Box 591
5174 Highway 133
Somerset, CO 81434
[phone]
Fax [phone]
Re: Mountain Coal Company LLC (MCC), West Elk Mine; Permit No. C-80-007; Minor
Revision No. 308 (MR-308), One Methane Drainage Well (MDW) (24-OSA) on Pad 24-05.
Dear Mr. Burnell,
MCC is submitting this Minor Revision to Mining and Reclamation Permit to include the plan for
drilling one MD W (24-OSA) on the existing 24-OS drill pad, approved in 2004 as part of the Annual
Operating Plan Minor Revision No. 302. Sediment control will be placed and the water will be
conveyed as much as possible to a new mud pit. The mudpit will be located on the existing pad and
constructed in subsoil.
The proposed typical well construction design, and plug and abandonment diagram aze attached. The
plugging and abandonment of the well will be as follows: In accordance with the Coal Program
Guidance Document -Methane Drainage and Monitoring Wells, MCC will plug and abandon these
MDWs per DMG Rules 2.05.4 and 4.07.3 at the minimum, recognizing that due to subsidence, damage
to the casing may preclude setting a packer within 50-feet of the perforated, 7-inch casing. In such
cases the mechanical packer will be set at the lowest possible point in the well. A cement plug will be
installed with ttemmie line beginning at the plug and preceding a minimum of 50-feet up the well.
From that point the hole maybe plugged to within 5-feet of the casing cut-off point with approved
materials. The top 5-feet of the well below the sub-surface casing cut-off point (3-feet below the
surface) will be plugged with a cement cap. The top 3-feet of the casing will then be cut off and the
hole filled in with subsoil. A permanent marker shall be installed on top of the plug identifying the
MD W. The pad will then be reclaimed to approximate original contour.
As shown on the well construction design, the depth of this hole will be approximately 2,049 feet.
The Federal Coal lease affected is COC-56447.
The area has been previously disturbed.