REP24228

• Permit No: C1981044
• IBM Index Class Name: Report
• Doc Date: 3/30/1984
• Doc Name: ANNUAL HYDROLOGIC REPORT text
• From: EMPIRE ENERGY CORP
• To: MLRD
• Permit Index Doc Type: HYDROLOGY REPORT 1983
• Media Type: D
• Archive: No

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of several parameters including sulfate, cadmium, chromium, lead,
zinc, molybdenum, iron, and manganese are somewhat elevated with
mean concentrations exceeding standards for either drinking water,
receiving stream quality, or agricultural use (Table 20).
1.2.6 Yampa River Alluvium
The five wells completed in the Yampa River alluvium were monitored
monthly for field parameters and water levels, and two of them
(YAW-3 and YAW-5) were sampled quarterly for full suite analyses
during 1983. A summary of the 1983 field parameters is shown in
Table 19. A summary of the 1983 full suite water quality analyses
is given in Table 23 and a cumulative summary of water quality data
since 6/82 is presented in Table 22.
Based on information in these tables, no detectable changes in
water quality have occurred over time. Water sampled from the
Yampa River alluvium is also of poor quality when compared to
bedrock ground water sources in the mine area. For the period of
record from 6/82 to 12/83, mean TDS concentration was 4500 mg/L
with a range from 1100 to 8810 mg/L (Table 22). Prevalent chemical
type is Na-SOq. Mean pH is 7.63 and ranges from 7.11 to 8.20
(Table 22). Mean concentrations of several metals also exceed
recommended standards for domestic or agricultural uses.
1.2.7 Springs
A summary of the 1983 field parameters for each spring is presented
in Table 25. Summaries of 1983 full suite water quality analyses
and cumulative water quality analyses for each spring are presented
in Tables 26 through 32. The data in these tables do not indicate
a significant water quality change of water from any of the springs.
II. SURFACE WATER EFFECTS
2.1 Surface Water Quantity
Flow data is collected at upstream and downstream locations far
both the Williams Fork and Yampa Rivers. Flow measurements were
determined by means of a staff gage at all locations except for the
downstream Williams Fork station (Site WF-2), which was read by a
continuous recorder. During 1983, Empire Energy Corporation
encountered problems in obtaining flow measurements for these
rivers. In the spring and early summer, the staff gages were
washed out due to high flows and were not replaced until October
1983. Also, data after October 1983 was not obtained for site
WF-2, due to a broken recorder. As a result, the flow data that