REP20511

• Permit No: C1992080
• IBM Index Class Name: Report
• Doc Date: 10/28/2003
• Doc Name: 2002 AHR Review Memo
• From: Tom Kaldenbach
• To: Harry Ranney
• Annual Report Year: 2002
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

STATE OF COLOlZ~DO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman St., Room 215 C O L O RA D O
Denver, Colorado 80203 DIVISION O F
Phone: [phone] M 111 E RA L S
FAX: [phone] G E O L O G Y
0.EG LAM ATIO N•MINING
$AFETY•SCIENCE
MEMO
Bill Owens
Date: October 28, 2003 c°"e`nn'
Greg E. Walther
Executive Director
To: Harry Ranney
Ronald W. Cattany
Division Director
From: Tom Kaldenbach Natural Resource Trustee
Re: Carbon Junction Mine, Permit C-92-080
Review of 2002 AHR
I have completed my review of the above-referenced AHR. The AHR indicates no problems
with hydrologic impacts at Carbon Junction. There are, however, the following two issues
regarding compliance with sampling and reporting requirements:
1) The operator missed sampling events at the downgradient well, 95-1. Permit page 5-36
calls for semiannual field parameters and semiannual full suite analyses from this well.
Only one full suite analysis was done, and no field parameters were done. The missed
samples create a gap in the monitoring record that hinders identification of trends in
ground water quality, quantity, and flow.
2) The report was submitted three months after the Match 31 deadline that is set forth on
page 4-13 of the mining permit.
cc: Daniel I. Hernandez, CDMG
Office of Office of Colorado
Mined Land Reclamation Ac[ive and Inactive Mines Geological Survey