REP22232

• Permit No: C1980001
• IBM Index Class Name: Report
• Doc Date: 3/1/2006
• Doc Name: 2005 AHR Review Letter
• From: DMG
• To: The Pittsburg & Midway Coal Mining Co.
• Annual Report Year: 2005
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215
Denver, Colorado 80203
Phone: [phone]
FAX: [phone]
Inter-office Memorandum
COLORADO
DIVISION O F
MIN~RALS
GEOLOGY
0.f CLAMATION•MININO
SAFETY•SCIENCE
Bill Owens
Gavemor
to: File, 2005 Annual Hydrology Report, C-1980-001, The Pittsburg & Midyy~l~~
Mining CO. Executive Director
from: Byron G. Walker Ronald W. Cattany

subject:
Review of 2005 Annual Hydrology Report, C-1980-001 Division Director
Natural Resource Trustee
date: March 1, 2006
A 2005 Annual Hydrology Monitoring Report (Annual Hydrologic Report, AHR) for the Edna
Mine CDMG Permit No. C-001-80 was dated February 2005. It was prepared for The Pittsburg
& Midway Coal Mining Company by WWC Engineering (WWC), and submitted to the Colorado
Division of Minerals and Geology (Division) under a WWC letter dated February 13, 2006.
Table of Contents
Rule 4.05.1(1) ......................................................................................... .......................................1
Rule 4.05.1(2} .......................................................................................... ......................................2
Rule 4.05.1(3) .......................................................................................... ......................................2
Rule 4.05.12 ............................................................................................. ......................................2
Rule 4.05.12(1) ........................................................................................ ......................................2
Rule 4.05.12(2) ........................................................................................ ......................................3
Rule 4.05.12(3) ........................................................................................ ......................................3
Rule 4.05.13(4) ........................................................................................ ......................................3
Rule 4.05.13(4)(a) .................................................................................... ......................................3
Rule 4.05.13(4)(b) .................................................................................... ......................................3
Rule 4.05.13(4)(c) .................................................................................... ......................................3
Rule 4.05.13(4)(c)(i) ................................................................................ ......................................3
Rule 4.05.13(4)(c)(ii) ............................................................................... ......................................3
Rule 4.05.13(4)(c)(iii) .............................................................................. ......................................4
Review of Predicted Probable Hydrologic Consequences ....................... ......................................5
CWQCCR 31 ........................................................................................... ......................................6
CWQCCR 31.11 ...................................................................................... ......................................7
CWQCCR 33.0 ........................................................................................ ......................................7
CWQCCR 41 ........................................................................................... ......................................7
Colorado Discharge Permit System ......................................................... ......................................8
Rule 4.05.1(1) Surface and underground mining activities shall be planned and conducted to
minimize disturbance of the prevailing hydrologic balance in both the mine plan and adjacent
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Office of Office of Colorado
Mined Land Reclamation Active and Inactive Mines Geological Survey