APPCOR12640

• Permit No: C1992081
• IBM Index Class Name: Application Correspondence
• Doc Date: 1/13/1993
• Doc Name: PAR FOR HG LOADOUT APPLICATION HG PEABODY C-92-081
• From: DMG
• To: STEVE WATHEN
• Media Type: D
• Archive: No

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STATE OF COLORADO
DIVISION OF MINERALS AND GEOLOGY
Department of Natural Resources
1313 Sherman 51., Room 215
Denver, CO 80203
Phone: [phone]
FAX: [phone]
January 13, 1993
TO: Steve Wathen/~
FM: Shawn Smith
Re: Preliminary Adequacy Review for HG Loadout Application
HG Peabody (C-92-081)
Dear Steve:
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Ruy Rumer
Governor
Michael 8. LnnF
Drvuion Direcio~
I have reviewed the following sections of the permit application
from Peabody for PAR concerns per Larry's request dated 1/8/93.
2.04.5 - General Description of Geology and Hydrology
2.04.6 - Geology Description
2.04.7(1) - Ground Water Information
2.05.6(3) - Protection of the Hydrological Balance
2.06.8 - Alluvial Valley Floors demonstration and
investigation
In addition, I have reviewed both Volumes I and II of the permit
application with the pertinent sections, hydrological data
submitted for 1982-1984 for baseline studies on the alluvial wells
on the loadout site, and the Seneca II-W permit; Volume 11, Tab 16
pg 13-20 for the Keammerer Ecological Consultants and Golder
Associates study on Dry Creek as a potential AVF.
All geological descriptions are complete, with stratigraphy and
structural analysis provided.
General surface and ground water hydrologic trends and parameters
have been provided. All ground water information has been found to
be accurate and complete with records of well chemistry data from
5/87 to 10/91 provided which compares to baseline data of 1982-84.
Since the background TDS and sulfate levels are so high, any impact
by the loadout will be masked. The two alluvial wells, HGDAL 1 and
2 (upstream and downstream respectively) were drilled in late 1981
into the Lewis shale member. Evidently, from baseline data
gathered 1982-84, the Lewis shale is responsible for the extreme
salinity and high metal chemistry illustrated. TDS ranges in HGDAL
1 run from highs of 76,000 in fall to lows of 750 mg/1 with 37,000
mg/1 the average. Well HGDAL 2 shows somewhat lower TDS levels,
with high of 67,000 and low of 330 with 30,000 the average. There