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H. Discharge of Water into an Underground Mine <br />At this 1994 permit renewal, water has not been diverted or <br />discharged into any underground mine in conjunction with on- <br />going mining and reclamation activities at the Southfield <br />Mine. <br />However, the Division has received Technical Revision No.19, <br />as a response to Stipulation No.20, which outlines plans for <br />a closed-loop system within the Southfield Mine. Water will <br />be pumped from one area of the mine and discharged via a <br />pipeline to previously abandoned workings within the mine, <br />pending MSHA and Division approval. TR19 is currently under <br />adequacy review. <br />I. Stream Buffer Zones <br />There are no perennial streams or surface drainages in the <br />Southfield Mine area or loadout that support significant <br />biological communities. <br />J. Probable Hydrologic Consequences <br />Ground Water Description and Consequences <br />The permitted area lies on the southern terminus of the <br />Chandler Syncline, where the Southfield Mine is currently <br />mining the Red Arrow and the Jack O'Lantern seams of the <br />Vermejo Formation. <br />Groundwater resources in the permit and adjacent areas are <br />limited in extent due to lenticular lithologies of the <br />potential water-bearing units and. because of previous <br />underground coal mine dewatering. Three adjudicated wells <br />were identified within the permit and hydrologically adjacent <br />areas: the Corley Mine Well, the Corley Company well and the <br />Thompson Well. The Corley Mine Well produces water from mine <br />workings in the Vermejo Formation. The Corley Company Well <br />produces from the Raton Formation. The Thompson Well is <br />within the permit area and was developed in a localized coarse <br />gravel lens on top of a sandstone above the Rex Carbon Seam. <br />The operator has collected baseline ground water data for the <br />newly permitted area through Permit Revision 1, approved in <br />March of 1991. The permit revision added 1,235 acres to the <br />original permitted area for a total of 2823 acres prior to <br />1993. With the inclusion of the mine fan access road, an <br />additional 3.5 acres has been added to the permit for a total <br />of 2826.5 acres. The wells used to accumulate baseline data <br />serve to monitor both water quality and quantity effects <br />before the effects extend to the wells to the north of the <br />permitted area, in the direction of subsurface flow. If in <br />the future, data suggest that drawdown to the Corley wells is <br />occurring, the operator may be required to install additional <br />monitoring wells closer to the wells of interest and meet the <br />32 <br />