REV14291 - Laserfiche WebLink

Home Browse Search

Groundwater Monitoring: Bear Creek drainage - OMLLC monitors one lower alluvial monitoring well and one deep Somerset mine workings well. Elk Creek drainage - OMLLC monitors three alluvial wells located near the OMLLC surface facility. Hubbard Creek drainage - OMLLC monitors one deep Somerset mine workings well. All monitor wells aze sampled for static water level and field parameters twice during June through October. A laboratory sample is collected from each monitoring well during the third quarter. The 2003 reassessment of the hydrologic resources in the Elk Creek lease may result in the inclusion of additional hydrologic monitoring points. If appropriate, the additional points will be added to the OMLLC Monitoring plan and reported in the AHR. PHASE II Phase II Inventory The United States Forest Service (USFS) forest planning documents include range improvement information listing a number of ponds located in the lease azea. USFS information also indicates a number of water rights filings for stock ponds in the Elk Creek lease. This information is not confirmed by inclusion in the corresponding CDWR records. A review of the USFS information reveals inconsistencies with legal descriptions of the pond locations and inconsistencies with the legal description versus the locations shown on USFS supplied maps. Because of the inconsistencies with the USFS information (which dates back to the 1960's and 1970's), OMLLC has committed within the CDMG permit Exhibit 2.05-E7 (also Appendix 4 herein), to conducting a field reconnaissance during the summer of 2003 to reassess and or reconfirm the information relative to the existence of these ponds and any associated major springs or seeps located within the Ells Creek lease area on USFS lands. The condition and status of the hydrologic features (field parameters, water source and estimated flow volumes, condition and size of structures or improvements, etc.) will be updated and tabulated for inclusion into the CDMG permit. When compared to the areas planned to be mined, it is important to note that the overburden thickness beneath these USFS features ranges from 1775 feet to 2475 feet. Because of the high cover above the longwall panels, no adverse impacts to these . hydrologic features are predicted due to mining activities. In addition, longwall mining under these USFS areas are not planned until 2009.