REP42579

• Permit No: C1981022
• IBM Index Class Name: Report
• Doc Date: 1/1/1997
• Doc Name: 1996 AHR
• Annual Report Year: 1996
• Permit Index Doc Type: HYDROLOGY REPORT
• Media Type: D
• Archive: No

• monitoring will recommence and the data will be interpreted and correlated. A significant
change in the quality or quantity of flow from the springs after retreat mining would indicate
that the mine may be having an impact on the springs. Springs 1 through 6 are located above
the mine workings and aze sepazated from the mine by over 2,000 feet of overburden.
The spring monitoring data, Springs 1 through 11, interpretation and correlation with
past monitoring was submitted with the 1992, 1993, and with the 1994 annual hydrologic
reports. No mining will be performed within the angle of draw of Springs 1 through 6 or
Springs 10 and 11 until the baseline monitoring and interpretation of the data is complete and
approved by the Division. Baseline monitoring was completed in June 1994. Interpretation
and correlation of the data was submitted to the Division on September 15, 1994.
Springs 1-6 have continued to be monitored pending approval of the report by the
Division. 1996 monitoring data for Springs 1-11 are included in sections 3.10.1, 3.11.1, and
3.13.1.
When the present spring monitoring was begun in June 1993, effort was made to
locate the springs as marked on the Monitoring Location Map from Western Slope Carbon
Hawk's Nest Mine included in the permit documents as page 2.04-SOxvui. The legend
indicates the marking to be Approximate Spring Location. Actual monitoring locations have
been marked on the ground, and monitored at the same locations since.
Spring 1 is a depression near a grove of aspen trees. The depression may have
contained water when it was monitored previous to 1993. Data have not recorded a flow.
The other field parameters, pH, conductivity, and temperature would indicate monitoring of
• surface water collected in the depression.
Spring 2 is possible re-emergence of water in a small ephemeral drainage channel.
Flows, if any, are recorded in the spring and summer. The field parameters aze similar to
surface water. Springs 3, 4, 5, & 6 are also possible re-emergence of surface water in a small
ephemeral drainage, with similar characteristics of flow diminishing from spring to summer,
moderate pH, low conductivity, and variation in temperature.
Of all the Springs 1-6, only Springs 4 and 5 usually have consistent flow. Springs 2
and 6, located in the ephemeral drainage channels below Springs 4 and 5, aze dry following
spring run-off. Although the actual locations of the six springs have not been surveyed, and
only Spring 1 may be within the permit azea, all six springs are within the Hawksnest Creek
drainage area.
Spring 7 is in the hill-side, cut-bank of the Coal Gulch trail. While the historical data
for Spring 7 indicates it is typically dry, monitoring indicates ground flow in the spring
months, resulting in high conductivity measurements.
Spring 8, the flow from the abandoned Oliver Mine, had recorded flow during all of
the monitoring events. The monitoring data collected is indicative of a ground water source.
Spring 9 is a spring or seep at the base of the landslide feature in the Unnamed Gulch.
Flow has been nearly continual, but at very low rates. High conductivity measurements
indicate ground flow. Spring 10 is a spring or seep at the base of the colluvium just above
Old Highway 133 at the west end of the Hawk's Nest east site. Data for Spring 10 is similar
to Spring 9, but shows greater variability.
Spring 11 was covered during the reclamation of the Hawk's Nest East Mine by the
• Division. It was originally in the facilities area below Old Highway 133. No flow was
recorded for Spring 11 in 1992 and 1993. In May of 1994, water began to collect in the road