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SUNFLOIdER ENERGY CORPORATION 717.15 Disposal of Excess Rock and Earth Materials Dave informed me that no excess rock or earth materials have been encountered in the mine over the last nine months. 717.17 Protection of the Hydrologic System The sedimentation pond does not have a dewatering device. The operation has been issued NPDES permit lICO-033553 by the Colorado Department of Health. Dave stated that a discharge point will be established before snowmelt this Spring. The Colorado Health Department expects discharge to occur from the sedimentation pond, according to a phone conversation on February 25, 1980 with Ptr. Dave Bowman in the Grand Junction, Colorado office. Placement of the dewatering device prior to Spring snowmelt is vital. The pond is designed to control the subject watershed, but i[ is subject to seepage from the water table due to its proximity to Hubbard Creek. The surface runoff control plan has been installed in the form of diversion ditches and berms. There is a diagonal ditch routing runoff from the bench down to a roadside ditch. Runoff from the bench has a tendency to flow straight down the hill instead of in the diagonal ditch. Simplifying the drainage pattern should be discussed with the State Authority. A small retention basin has been placed along the Creek to intercept runoff from the coal stockpile area. A ditch behind the stockpile drains the backside. AC the time of this inspection, a culvert had been covered by [he grading operation along the haulroad. Snowmelt bypassing this culvert ran into the stockpile retention basin. The basin is not designed to contain this flow and the blocked culvert must be cleaned immediately. Maintenance of the haulroad berm on the Hubbard Creek crossing was adequate. Ongoing maintenance is critical. Ditches and culverts require constant cleaning. One culvert beneath the Forest Service access road, used for haulage by the mine, needs riprapping or some form of energy dissapator below tl~e discharge. The alternative is to shorten the culvert. The mine plan states that no aquifers or groundwater will be intercepted during mining. This statement is based on drill hole data from adjacent properties, field studies, and specially flown aerial photos. Any groundwater has been determined to be 200 feet below the seam being mined. To date, no water has been encountered in the workings. 717.20 Topsoil Handling and Reveaetation Little topsoil has been salvaged at this operation. There is a stockpile at the edge of the sedimentation pond. The turnout at -2-