REP12263

• Permit No: C1980001
• IBM Index Class Name: Report
• Doc Date: 2/29/1988
• Doc Name: EDNA MINE ANNUAL HYDROLOGY REPORT PN C-80-001
• From: MLRD
• To: PITTSBURGH & MIDWAY COAL MINING CO
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

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STATE OF COLORADO
Roy Romer, Govei
DEPARTMENT OF NATURAL RESOURCES
MINED LAND RECLAMATION DIVISION
FRED R. BANTA, Dlreetor
February 29, 1988
Mr. David Beverlin
Pittsburg & Midway
P.O. Box 176
Oak Creek, Colorado
Coal Mining Company
80467
Re: Edna Mine Annual Hydrology Report; Permit C-80-001
Dear Mr. Beverlin:
The Division has completed the review of the AHR received on December 10,
1987. The submittal was very well organized with very useful graphs and an
excellent narrative that provided a historic perspective and a cogent analysis
of the data. Such a report is easy for the Division to review and to compare
against the approved hydrologic monitoring plan.
During our review, a number of concerns were identified as addressed below.
Some of these concerns were previously discussed with you during a telephone
conversation with Ms. Cathy Begej. Also, as addressed below the Division
believes some changes should be made to the approved plan based upon results
of the AHR. As addressed in the regulations, specifically Rule 1.04(136),
such changes should be submitted as a technical revision application. I have
included a revision application form for your execution when submitting this
revision application.
1. The approved surface water monitoring plan specifies field parameters
will be monitored seven times a year, However, the required monitoring
is regularly being performed only six times. As obtaining this
information during all periods when the water is not frozen is important,
P 8 M needs to ensure that monitoring occurs seven times annually.
The approved surface water plan specifies that continuous flow monitoring
for the Kol1 ditch flume, for site TR-a, and for the Homestead ditch
diversion will be performed for six months of the year. Submitted data
averaged monthly flow from the charts an average of five months per year
during the last five years. P & M needs to ensure that data is collected
for the entire six month period. While average monthly flow data
provides seasonal information, the Division also needs to know
instantaneous flow information in conjunction with water quality data.
Please provide instantaneous flow values with all surface water quality
samples.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. [phone]