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REP04024
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Entry Properties
Last modified
8/24/2016 11:35:05 PM
Creation date
11/26/2007 10:41:21 PM
Metadata
Fields
Template:
DRMS Permit Index
Permit No
C1981038
IBM Index Class Name
REPORT
Doc Date
3/8/2007
Doc Name
2006 Annual Hydrology Report
From
J.E. Stover & Associates
To
DRMS
Annual Report Year
2006
Permit Index Doc Type
Hydrology Report
Media Type
D
Archive
No
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• during 2006 for water levels and field parameters. Well SM-1 is next to areas mined in 1991 and 1992 but <br />showed no apparent impacts in the field data collected during 2006. Well SM-9 was undermined by Panel C <br />during 1993 but showed no apparent impacts in the field data collected during 2006. No anomalous water <br />quality observations were apparent during 2006 at the Steven's Gulch shallow groundwater monitoring wells. <br />Surface Water Monitoring Stations -SPRINGS <br />East Roatcap Creek- Two springs were monitored in the East Roatcap Creek drainage (refer to Table 1 and <br />Map No. 4-1) during 2006. Spring 30 had flows that were near average during the year. Spring 30 was first <br />undermined in April 1983. Spring 10-10 was dry during the reporting period. Spring 10-10 was encompassed <br />by the angle-of-draw of Panel Y during October 1993. Subsidence impacts were not apparent at either of <br />these locations during 2006. <br />West Roatcap Creek -Two springs were monitored in the West Roatcap Creek drainage (refer to Table 1 and <br />Map No. 4-1) during 2006. Spring 32 was monitored monthly. Spring 32 exhibited flows that were below <br />average. Water quality parameters were consistent with last year's sampling. Spring 14-4 was monitored <br />quarterly. Flows were considered normal. No mining occurred during 2006 in the Spring14-4 watershed. <br />Stevens Gulch- One spring was monitored within the Steven's Gulch drainage (refer toTable 1 and Map No. <br />4-1) in 2006. Spring 25 lies below an area of the East mine inactive since 1982. This site had no measurable <br />flows in April, June, September or December. Spring 25 has been identified as an adjudicated water right <br />within the permit area. <br />Two springs with ponds in the Stevens Gulch drainage, Spring and Pond 13-5, Spring and Pond 13-6 were <br />monitored quarterly in 2006. Spring and Pond 13-5 was undermined during the last half of 1992. Spring and <br />Pond 13~ was undermined during the end of 1988. Spring 13-5 was reported as a seep during April and was <br />dry during June, September and November. Spring 13-6 had measurableflowduringAprilandwasdryduring <br />June, September and November <br />Terror Creek- There is one spring monitored within the Terror Creek drainage (refer to Table 1 and Map No. <br />4-1) and it was monitored during 2006. Spring and Pond 20 was undermined during the East Pod <br />development, panels EP-3 and EP-4. The spring has extensive data collected to characterize the typical <br />hydrology. This location was identified and targeted by the DRMS as adjudicated water right within the permit <br />area. No adverse mine related impacts or other irregularities were noted at this Terror Creek Springs. <br />Surface Water Monitoring Stations: STREAMS AND DITCHES <br />Overall, adverse im pacts attributable to m fining were not evident at any of the monitored surface water stations <br />(refer to Table 1 and Map No. 4-1 ). Stations SW-5 (Stevens Gulch) and SW-6 (East Roatcap Creek) <br />exhibited flows and water quality parameters consistent with previous years data. Station SW-10 (Terror <br />Ditch} exhibited typical flows for an irrigation ditch. No evidence of subsidence impacts in these drainages <br />was apparent. Mining occurred in the Stevens Gulch drainage upstream of site SW-5 during 1993 in Panel C. <br />Panel C mining was designed and conducted to prevent the development of subsidence to protect the <br />waterway and certain structures in the vicinity. Data collected during 2006 shows these protective measures <br />were successful. <br />Surface Water Monitoring Stations: SMALL AREA EXEMPTIONS <br />The east mine fan level was defined as a small area exemption since drainage from this area (refer to Map 8- <br />1) is not conveyed to a sediment pond. Three sample points were defined at this location and sampled for <br />conformance with the NPDES discharge alternative limitations requirements associated with discharges <br />occurring because of precipitation events of less than the 10-year and 24-hour magnitude. In these instances, <br />settable solids and pH limitation must be met. No samples were collected during 2006 from these SAE points. <br />Coal Member of Mesaverde: <br />All previously monitored drill holes have now collapsed and are no longer monitored. The final hole, DH-60, <br />was monitored by a long tube used to pressurize the hole and produce an estimate of water level. This tube <br />
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