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• entering the OMLLC surface facility. Due to the prevailing drought conditions, during 2003 there was, again, minimal flow at E-2. S-1 -Upper Sanborn Creek and S-2 -Lower Sanborn Creek Surface water monitoring points S-1 -Upper Sanborn Creek and S-2 -Lower Sanborn Creek were established to monitor the flow in ephemeral Sanborn Creek above and below the disturbed azea of the Sanborn Creek Mine site. Sanborn Creek also received discharge water from the Sanborn Creek mine, consisting primarily of natural mine water inflows and some runoff of imported (from the North Fork intake) water from the mining sections. The mine water discharge (CDPS discharge point 011) commingled with upper Sanborn Creek flow for a distance of approximately 300 feet through culverts under the railroad and highway prior to discharging into the North Fork of the Gunnison River. The S-2 sample site is located at the outlet of the culvert, prior to the confluence with the river. Sanborn Creek, an ephemeral stream, flows at monitoring point S-1 during spring runoff and significant precipitation events. The disturbed mine site area and mine water could affect the quality of water in Sanborn Creek at Point S-2 only when there is flow at S-1. For this reason, S- 2 is monitored only if S-1 has flow. During 2003, S-1 (and S-2) had minimal flows and bymid-June flows had ceased altogether. • Coal mining in the Sanborn Creek mine ended in early 2003 and the Outfa11011 was terminated on May 21, 2003 by the dismantling of the discharge pipeline and the mine pump system. With the removal of the mine dischazge Outfall 011, a review of the data for Sanborn Creek suggests that the mining activities had no adverse effect on Sanborn Creek. C-1 -Lower Coal Gulch Surface water monitoring point C-1 -Lower Coal Gulch, an ephemeral drainage, is monitored to verify that the Sanborn Creek mine does not have an adverse affect on the quality of runoff in this drainage. Due to prevailing drought conditions, during 2003 there was, again, minimal flow in Coal Gulch. NF - 1.2,3 -North Fork of the Gunnison River Surface water monitoring points NF-1 (North Fork upstream), NF-2 (North Fork mid- downstream) and NF-3 (North Fork downstream) were selected to monitor the water quality in the North Fork of the Gunnison River above and below the disturbed surface mine site of the Sanborn Creek and Elk Creek Mines. Monitoring point NF-3 was established in September 1997 to monitor mining-related water quality impacts from the West Valley coal refuse pile. It should be noted that NF-3 is also downstream from the town of Somerset and monitoring results for this station most likely reflect impacts from domestic water use, possible leakage from sanitary sewers, the Bear Mine discharges, and other factors that are not related to the Sanborn Creek or . Elk Creek Mines. Similarly, the sample locations are located downstream of the adjacent Mountain Coal Company discharge points and potentially other less discrete historic mine discharges.