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DELTA SAND AND GRAV~CO. ~ PAGE 3 MLRB PERMIT q t1e~8~79 ~-~ {M, 9 4 - 0 Q } ADEQUACY RESPONSE // June 12, 19% in the future. I have labeled this area "FUTURE MINING" on the maps. The following text will help qualify our plan and should be part of the permit application. The 8.21 ac. ± on the west side of the affected area may be mined in the future. If this is done, we will submit a statemem of intent explaining how it will be done and supply the Division updated Mining and Reclamarion Maps. Ditches crossing the area will be constructed to avoid interrupting water delivery to the property south and west of our operation. 79te old gravel pit area will be reclaimed and the irrigation wastewater ditch will be maintained as necessary. Adequate amounts of soils can be salvaged from the pazcel to provide the necessary cover on the mined or disturbed areas. The original permit application stated there is 12 inches of soil on the site and the SCS soils information included in your review letter estimates the soil depth will be between 10 and 14 inches deep. Our observation from having mined part of the northern side of the property indicates a more realistic figure of zero to 14 inches of salvageable soils. What soils can be salvaged will be stockpiled on perimeter azeas and on the floor of the mined azea where it will be used as part of the final grading when reclamation is completed on any given azea. Any excess overburden encoun- tered will be used for backfilling. Initially the soil will be stockpiled as shown on the map. As mining progresses the soil will be spread on areas sloped and graded as it is stripped to avoid handling it more than once. The stockpiled material will then be used to complete reclamation on the last azea mined. A cover crop of Western Wheatgrass will be planted on any soil stockpiles that remain undisturbed for at least a year. The topsoil stockpiles are located to reduce the haul distances when reclamation starts. We will make sure we have adequate amounts stored to meet the reclamation needs at any one dme during the life of the mine. Exhibit - E Reclamation Plan During the conswction of the access road discussed in the 1996 Technical Revision, we placed a 12 inch corrugated metal pipe (CMP) in the ditch that matches the size of existing CMPs on the ditch. In the future we will match existing culverts or make them ~0 00 ~- larger as needed to keep them flowing. The new ditch route is approximately 4,040 feet `~ long, not the 1.25 miles you noted. Once I c~ red the contour labels ~,,~ can see that there is approximately 20 feet of fall from thb~ide (5740+) to the ~ side (5720 -). We will commit to reconstructing the ditch so it will have adequate "drop" to flow across the site. All of the ditches shown on the maps are earthen imgadon ditches. I assume the ditch you refer to as the "south one" is the ditch that crosses the original permit azea from the south line to the pond on the north. This ditch was used to irrigate only this eastern 40 acres and can be wntrolled from the headgate shown on the map. We understand that if it is directed down the slope after mining is complete that some precaution will be needed to assure there is no erosion or head cutting caused by it flowing down the slope. The most practical way would be to traverse the slope to create a ditch that flows