REP31272

• Permit No: C1981071
• IBM Index Class Name: Report
• Doc Date: 7/10/1987
• Doc Name: 1986 SURFACE WATER MONITORING AT ECKMAN PARK FN C-81-071
• From: MLRD
• To: DAN MATHEWS
• Annual Report Year: 1986
• Permit Index Doc Type: Hydrology Report
• Media Type: D
• Archive: No

• • iii iiiiiiiiniu iii
999
STATE OF COLORADO
Roy Romer, Gove
DEPARTMENT OF NATURALRESOURCES
MINED LAND RECLAMATION DIVISION
DAVID C. SHELTON, Director
DATE: July 10, 1987
T0: Dan Mathews
FROM: Cathy Beg~j~~
RE: 1986 SURFACE WATER MONITORING AT ECKMAN PARK - FILE N0. C-81-071
Water quality impacts at the Eckman Park complex are observed in increased
levels of sulfate, TDS and manganese and appear to be mainly restricted to
Foidel Creek. Iron concentrations along the entire stream exceed recommended
standards for aquatic life, but an increasing trend downstream was not
observed. Mine 2 has had minimal impact on Fish Creek. Sulfate and TDS
levels increase, but concentrations are generally lower than recommended
standards. The ratio between total dissolved solids concentrations and
conductivity was generally less than parity in the latter half of 1986,
indicating substantial improvement in field sampling.
CYVCC reported 90% of the surface water monitoring required by their plan. As
many of the omitted parameters have since been deleted from the Hydrologic
Monitoring Plan (HMP) it is not worthwhile to pursue enforcement action. In
addition, CYVCC sampled a number of sites more frequently than required.
There seemed to be confusion about the monitoring requirements for individual
permits, which hopefully has since been clarified by modifications in all of
the HMP s.
However, during 1986, manganese concentrations were not recorded at the
U. S. G. S. sites. As these sites were always backed up by company sites,
concentrations could be interpolated from adjacent sites. However, the 1987
HMP does not include comparable back-up and it is of paramount importance that
Cyprus ensure that all parameters within the approved monitoring plan are
monitored this year.
Spoils spring monitoring data from Exhibit 28, Little Middle Creek Permit
Revision application was not totally compiled in the computer print-out of
water monitoring data. As this data provides valuable insight in to the
general and unique behavior of those springs' flow, the Division requests that
it be included in future annual hydrologic reports.
There were a major number of data summaries in the AHR which included the
parameter cyanide. Discussion with Mr. Jim Nalven indicated that this was
computer coding error for some hardness data. The company data base has
subsequently been modified.
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0973E
423 Centennial Building, 1313 Sherman Street Denver, Colorado 80203-2273 Tel. [phone]