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is shown as having ditch 9-U1 as an outlet conveyance and ditch 9-D2 as <br />the inlet. P1ap IV-9 shows pond 9-D4 as ha vinq-ditch 9-UI as an inlet and <br />no ditch at the outfall. Pond 9-PS is shorn in drawing IV-37 as having <br />ditches 9-D6 and 9-D9 as inlets and no conveyance shown for outfall. Map <br />IV-9 shows ponds 9-PS as having ditch 9-D2 at the inlet and 9-D3 at the <br />outlet. Empire Energy must present drawings of the two ponds which are <br />consistent with all other sources of data on the ponds (Rule 4.05.6). <br />8. AZ1 ponds designed and constructed by Empire Energy used a very high <br />value of sediment density (d=90NA3). As the ponds are all completed at <br />this time, redesigning the ponds using a more valid figure is inappropriate. <br />She Division recommends that the ponds have a permanent marker placed at <br />the 60 O/A sediment capacity and be cleaned out when sediment accrual <br />reaches this point. The applicant should address the requirements of <br />minimum storage volume and sediment removal as required by 9.05.6(3)(b). <br />2.05.3(5) Topsoil <br />1. The soils map III-IS needs to show the depths to which topoil and <br />subsoil will be salvaged (Rule 2.05.3(5]). <br />2. Methods used to separate topsoil from suhsoiI need to be discussed <br />(Rule 2.05.3(5)). <br />3. A discussion of the means by which topsoil will be protected during <br />storage is necessary as well as the methods used for topsoil salvaging <br />(Rule 2.05.3(5)). <br />9. The storage pad areas near the number 5 portal was found to have some <br />quantities of topsoil. It was recommended in the January 1981 inspection <br />report that this be salvaged. How much was salvaged? The application <br />should be amended to addressing this topsoil. The stockpile should also <br />be identified on the soils map. <br />5. A discussion of the methods to be used to restrip the topsoil from <br />overburden piles around the 9A portal area should be included. This <br />discussion should address the problem of possible topsoil and overburden <br />mixing (Rule 4.06.9(2](b)). <br />6. Since topsoil availability is a limiting factor in the reclamation <br />plan, it would be advisable to reconsider the depths of topsoil salvage <br />proposed. It appears that salvage depths were based only on soils that <br />received an overall suitability rating of good. Soils classified as <br />fair or poor should be considered, especially since most of the soils <br />classified as poor have onlq one limit.iny factor.. Salvaging to greater <br />depths would require more work in topsoil and subsoil segregation, but <br />in light of the fact that the reclamation plan calls for the punc~ase of <br />soil materials from outside sources it may prove helpful. <br />7. In previous inspection reports it has been noted that the dominant <br />vegetation cover of the topsoil stockpiles are noxious weeds. She applicant <br />is required to establish an effective cover of non-noxious plants or other <br />methods demonstrated and approved by the Division to protect the stockpiles. <br />-8- <br />