APPCOR11320 - Laserfiche WebLink

Home Browse Search

- Wetter: Ghiblt G Surface Water.- Please provide additional water quality data from the USGS gauaing station ease thn mina site. Without specific mean con- centration of maJor anions, cations and heavy metals In the receiving water, there will be no way to evaluate the results of your leachete teat on refuse material. A nanitoriny program should t,e estabilshed to record riater quality from the sediment pond; when they discharge due to cumulative rain fall oa anogmalt events which never exceed the ~Oyr,24hr storm criteria. Pond, should be r,•.onitoped r+eekly, when they discharge. .round Water - Please indicate Lire depth to around rater In the mining area south of the river. Use the existing ground~+rater borr+bboftog walls to obtain this Information. What is the maximum sustained pump- ing rate theso wells can maintain. 4!ater sar.~pling of these wells should begin promptly anri repeated quarterly. Results should be forwarded to this division and OSM as they become available. The application mentions f,~ sprtnns above the C sears, Which of these springs surface on the rrlrre area. Please Indicate all springs on [ha drainage conCrol map (supplementing exhibit C). The flesaverde sandstone Is implicated as [he aquifer supplying these springs. Where is this sandstone rclatiivv to the C scam. Please supply any and all core hole or drill log Information. THis can Le kept con- e fidential If you se desire. Use efdProtectfor+ of lister re_so_urces Is irrigation planned for the reclamation phase? qiU A~CO cirigate their revegetatlon plots2 Plaesa revise [he desl~n si~eclficatlons of Lire selirxint ponds to comply with provlsirx+s of the final regulatory program. These changes have been discussed with Ute Engineering and need to be ,, incorporated in the Plan and in the approprlatn appendices. ~. Appendix VI presents a design for a diversion ditch for unaffected area. Is this designed for the area bbove the mine portal or the area between the now vans shaft and topsoil borror+neaeal Again, ,' I think we should re-evaluate the diversion proposed for the west end of the property. E_xhlbit_N With the development of sediment pond a point source discharge may 6e created. The Water Quality Control Divlson should be consulted to determine it a 11PDES permit is required. Compliancd with 717 Performance 717.12 p.3 - The statement should read "conrato foundatloas will be removed at tasesteasfoot below grade or covered with a foot of material."• p.4 - You have no evidence to suppoat the statenw_nt that pollutants will not be leached from refuse material and that no bachfill will be necessary. p•5 (1) - Waste rock disposal praetlces may have to change in viewing of the permanent regulatory rules effective Oct 1~', 1979. Revege- tatlon should be In accordance with 717.20. j i ,. a. ~ ,