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are usually dry. Crest gage and sample collection stations SW1-1, SW11-1, and SW31-1 are monitored quarterly; however, runoff events often contain such high quantities of suspended solids that sampler tubes are plugged and the gaging device silted in. Constant servicing of these stations is necessary with no guarantee that the next runoff event will be measured and a sample collected. Kenney Reservoir has inundated the White River alluvium below Scullion Gulch and grab sample stations SW11-2 and SW12-1. Following review of the Second Annual Deserado Mine Hydrology Report, CMLRD suggested that surface water monitoring sites SW12-1 and SW11-2 be dropped from the monitoring program because they were inundated by Kenney Reservoir. Further, CMLRD suggested that monitoring of surface water sites SW6-1, SW31-1, and SW33-1 be discontinued until one year before mining related disturbance occurs in Federal Coal lease C-8424. Accordingly, Western Fuels submitted an application for a Technical Revision on 7/22/87 to eliminate surface water monitoring at SW12-1 and SW11-2 and to discontinue surface water monitoring at sites SW6-1, SW31-1 and SW33-1. Surface water monitoring is to be resumed at SW6-1, SW31-1, and SW33-1 one year before surface related disturbance occurs in Federal Coal Lease C-8424. The Technical Revision request has subsequently been approved. All surface water samples collected will be subjected to the analytical schedule shown in Table II.C-8. Maps 134 and 135 show the surface facilities, topography and the mine plans for the B Seam and D Seam respectively. As shown, longwall mining and room and pillar mining in both The D Seam and B Seam will occur under portions of Red Wash and Scullion Gulch and under Lincoln Reservoir, Halandras- Reservoir 'and Raven Park Reservoir. The existing surface water monitoring program provides for monitoring the quantity and quality of water in both Scullion Gulch and Red Wash. Additional monitoring will be necessary to detect and control effects of subsidence on the three stock watering ponds, (see Sections III.A.7.i and III.A.7.j for Subsidence Monitoring Plans and Subsidence Control and Mitigation procedures respectively). Stockponds and reservoirs undergoing active subsidence will be monitored and measures taken to prevent sudden outflows of water from them. As required, water quality data collected from surface water monitoring stations will be submitted quarterly to the regulatory authority. These reports will normally be submitted within 60 to 90 days following the end of each quarter, depending upon the speed of the laboratory analyses. (Renewal #2, 1/94) ILC-50 - -