REV94921 - Laserfiche WebLink

Home Browse Search

Springs SP-1 through SP-7, SP-l0 and SP-1 l are considered the result of the re- emergence of surface runoff from precipitation events, not from bedrock aquifer flow. Groundwater well sites TC-1 and SC-2 are completed in the Rollins sandstone, but monitoring can be eliminated in the two wells because well TC-2 is also completed in the Rollins. Well TC-2 can be eliminated because the well is completed in the North Fork alluvium that lies to the east of any mining. Well WSCDHI2 is a very deep methane de- gas hole for the Hawk's Nest Mine. Its value as a monitoring well is very limited. Except for a slight indication of water in 1996, it has been dry for many years before and since 1996. 56. There are several discrepancies benveen the hydrologic monitoring fi~eyteency information found in the monimring freyuency summary on proposed page 2 of Erltibit 2.05-7 of Volume 12 of the PR-04 srebmittnl acrd that in the approved monitoring freyuency list found in dre footnotes of permit application page 2.05-46c. Please revise proposed page 2 to reflect the approved monitoring freyuency. OMLLC is requesting a reduction in monitoring frequency for all surface water sites. The reduction in monitoring frequency would include no winter monitoring, November through March, of any of the surface water sites. The Division remains convinced that a complete elimination of winter hydrologic monitoring for all surface water sites is not warranted. Obviously, Ylow in the North Fork of the Gunnison is year round and sites are accessible for sampling. The historical record does show that there has not been any flow at any of the other surface water stations in the winter months for the last decade, except for Hubbard Creek. In the case of Hubbard Creek, [here is no required monitoring from November through March anyway. The Division agrees [hat winter monitoring of all surface water sites. except for [hose sites on [he North Fork of the Gunnison, can be terminated. If you have any questions, please let me know. Attachment cc: Sandy Brown (w/o attachment) c:\ms97\sanbom\pr4memoo m:\coal\jj d\pr4memo4