APPCOR12274 - Laserfiche WebLink

Home Browse Search

Page 5 Mitch Simmons November 2, 1979 V. Reclamation Plan The proposed reclaimed topography is much closer to meeting the requirements of approxioiate original contour. Additional comments on this topic will be forthcoming. S~rhat is meant by the statement on page lOR that "Gullies on the reclaimed surface will be lined with riprap"? If the applicant v~\ is referring to small reconstructed drainage channels, erosion control must be achieved by means of proper gradients, rather than rip-rap. 3. Appropriate grass have been included in the seed mix. However, the proposed seeding rates fail to take into consideration differences in seed size. The applicant should specify the number of seeds per square foot to be planted, as well as lbs. F.i..S./acre. The staff would suggest emphasizing prairie junegrass, western wheatgrass and green needlegrass in the mixture, with blue grama and sandberg bluegrass given lesser importance. 4. Specified 2 lb. P.L.S./acre for sagebrush is probably too high. 5. The applicant should include additional native fortis in the seed mix, as explained in my memo of September 7th. VI. Hydrology This section has not yet been reviewed by the staff hydrologist, or the Division of [rater Resources. Their conuoents will he forthcoming, on the issues of AVF, the augmentation plan, mining through and recon- structing Pfann Drata, surface and groundwater monitoring, and sediment control. However, my review has revealed a few preliminary concerns: Removal of the compacted clay barriers along the north and west boundaries of the property must be addressed. This caill be required during reclamation. At what stage of the operation caill these structures be removed? ~J Similarly, the concrete flood control structures must be removed fi.lb and the area reclaimed. `~ Groundwater and surface water monitoring is required for the life ~of~the mine, not the first two years as specified in the application. ~ 4. \Surface water monitoring must be iur quality as well as quantity. /~'; Please provide a list, in Exhibit G, of the parameters which 1 be analyzed, for both surface and groundwater monitoring. %~ (cont'd)