Laserfiche WebLink
-13- <br />A11 areas which have been or will be disturbed must be addressed. <br />Afore detail must be provided on backfilling, topsoiling, revegetation, <br />stream channel reconstruction, and portal sealing costs.' A detailed <br />worksheet should be provided, including relevant operating assumptions <br />such as: <br />a. Mass balance calculations, <br />b. Haulage distances, <br />c. Equipment type (make and model), <br />d. Location, job efficiency, and production adjustment factors, <br />e. Labor rate, fuel costs and maintenance costs, and <br />f. Reference from which hourly equipment costs and production <br />figures were obtained. <br />The estimated costs for portal sealing should include the costs of <br />materials, delivery, labor and the number of portals and airshafts <br />to be sealed. Soil preparation costs should be broken down into ripping, <br />disking, topsoil haulage and distribution. Revegetation costs should <br />include the seed mix costs, seedling costs, costs for drill-seeding, <br />hydroseeding, mulching, fertilization, fencing and labor. <br />2.05.4(c) - Backfillina and Grad <br />Rule~(2.05.4) requires a plan/schedule for backfilling and grading of the <br />disturbed areas in sufficient detail to allow the Division to evaluate the <br />feasibility of the proposed post-mining topography and the required bond estimate. <br />In order to define the projected material movements, Dorchester must quantify the <br />amount of material which will be moved to obtain the post-mining configuration. <br />1. The mass balance calculations should include, but not be limited to: <br />a. the source and amount of material to be used to achieve the <br />proposed post-mining topography as shown on map DOR-3 of the response, <br />b. the am~unt of waste material to be generated over the next S- <br />year permit term derived from the maximum coal production, the <br />experienced percentage of waste production and the experimentally <br />derived compaction rate, <br />c. the resultant topography of the refuse area, and <br />d. the source and total volume of material needed to place 9 feet <br />of non-toxic overburden on the waste pile. <br />2. The application must provide appropriate cross-sections of the <br />reclaimed surfaces as they relate to map DOR-3. The Division suggests <br />•~ that the post-mining topography map be done on a scale of Z" = 20B' <br />to facilitate calculations. <br />3. Two stream channels are shown on map COR-3. Dorchester must provide <br />adequate stream channel reconstruction plans in accordance with (4.05.9). <br />4. Dorchester must also supply information as to its compatibility <br />with adjacent operations in the mining and post-mining phases. <br />