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REP49014
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REP49014
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Entry Properties
Last modified
8/25/2016 12:52:50 AM
Creation date
11/27/2007 12:27:04 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981038
IBM Index Class Name
Report
Doc Date
5/2/1997
Doc Name
1996 ANNUAL HYDROLOGY REPORT PART 1 OF 2-INTRODUCTION TABLES AND NPDES LETTERS
Annual Report Year
1996
Permit Index Doc Type
HYDROLOGY REPORT
Media Type
D
Archive
No
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• Terror Creek <br />Four springs found within the Terror Creek drainage (refer to Table 5 and Map <br />No. 4-1) were monitored during 1996. Spring and Pond 17 and Spring 1-5, are <br />outside the anticipated extent of mining activity. Spring and Pond 20, Spring and <br />Pond 7-1 were undermined during the East Pod development, panels EP-3 and EP- <br />4. All four springs have extensive data collected to characterize the typical <br />hydrology at these sites. However, these locations were identified and targeted by <br />the Division as adjudicated water rights within the permit area. No adverse mine <br />related impacts or other irregularities were noted at any of these Terror Creek <br />Springs. <br />SURFACE WATER MONITORING STATIONS -STREAMS AND DITCFfES <br />Monitoring of surface water stations during 1996 was concentrated in the Stevens Gulch <br />and East Roatcap Creek areas as that drainage had seen recent mining activity and were <br />projected for further activity during the current permit term. Overall, adverse impacts <br />• attributable to mining were not evident at any of the monitored surface water stations <br />(refer to Table 5 and Map No. 4-1). Stations SW-5, Stevens Gulch, SW-6, East Roatcap <br />Creek, and 5W-10, Terror Creek, exhibited normal flows and water quality parameters <br />consistent with previous years' data. No evidence of subsidence impacts in these <br />drainages was apparent. Mining occurred in the Stevens Gulch drainage upstream of site <br />SW-5 during 1993 in Panel C. Panel C mining was designed and conducted to prevent <br />the development of subsidence to protect the waterway and certain structures in the <br />vicinity. Data collected during 1996 shown these protective measures were successful. <br />SURFACE WATER MONITORING STATIONS -SMALL AREA EXEMPTIONS <br />The East Mine fan level was defined as a small area exemption as drainage from this area <br />(refer to Map 8-l) is not conveyed to a sediment pond. Three sample points were defied <br />at this location and sampled for conformance the NPDES discharge alternative limitations <br />requirements associated with discharges occurring because of precipitation events of less <br />than the ]0-year 24-hour magnitude. In these instances, settleable solids and pH <br />limitation must be met. No samples were collected during 1996 from these SAE points. <br /> <br />Page -7- <br />
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