1993-11-15_GENERAL DOCUMENTS - C1981017

• Permit No: C1981017
• IBM Index Class Name: GENERAL DOCUMENTS
• Doc Date: 11/15/1993
• Doc Name: Bid Documents ‎(IMP)‎ Hydrology Correspondence Part ‎(2 of 2)‎
• Permit Index Doc Type: General Correspondence
• Media Type: D
• Archive: No

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/QF C
A � DEPARTMENT OF NATURAL RESOURCES
David H.Getches,Executive Director
MINED LAND RECLAMATION DIVISION
1876 DAVID C.SHELTON, Director
Richard D.Lamm
Governor
July 8, 1986
Mr. Doug Bowman
Mid-Continent Resources, Inc.
P.O. Box 158
Carbondale, Colorado 81623
Re: MLRD WATER SAMPLING, SPRING 1986, C-81 -017
Dear Mr. Bowman:
Enclosed are the results of our sampling this Spring. Most interesting are
the results of Well P-7. Sample (1 ) was filtered prior to acidification.
Sample (2) was not filtered prior to acidification. The iron is highly
elevated in Sample (2) as is aluminum and manganese. Most of the metals are
somewhat higher in concentration in Sample (2). Obviously, the acid is
leaching the metals and placing them in solution prior to lab filtering. In
order to alleviate this problem, you should either filter on-site or place the
sample in a non-acidified bottle and expedite delivery to the laboratory. The
major chemical constituents of the water showed little variation between the
samples as they are placed in non-acidified bottles. The variation in time to
filtering produced no significant variation.
Barium is elevated in all the samples, but highest in the lower ponds (001 )
and No. 1 mine discharge (004). Interestingly, P-7, the lower old refuse well
has the lowest barium level . The barium levels are not above the stream
standards in any of the samples.
The SAR and associated sodium levels are very high in the No. 1 mine
discharge. Sulfate is lower than expected from coal seams. Dutch Creek does
not appear affected by the high sodium discharge. Iron is elevated in all the
surface waters, but low in mine affected discharges.
The water discharging from the Sutey Rock Drain is of relatively good quality
and typified as calcium bicarbonate type. Again, sulfate is lower than
expected from coal refuse affected areas. The low residence time of leachate
in the pile and high recharge from spring run-off probably improve the quality
of the water.
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203 Tel. [phone]