INSPEC18294 - Laserfiche WebLink

Home Browse Search

;~ (Page 21 MINE ID A OR PROSPECTING ID # M-95-056 INSPECTION DATE BI6195 OBSERVATIONS INSPECTOR'S INITIALS WHE This pre-operational inspection was conducted by Wally Erickson and Tom Gillis from the DMG field office in Durango. Mrs. Kathy Weber and son, Mr. Mark Weber, accompanied the DMG inspectors throughout this inspection. Weber Sand and Gravel has submitted a 112 application to continue the disturbance originally created by special permit M-94-070, a 111 permit issued to A & S Construction. This preoperational inspection is part of the permit application review process conducted by DMG. Upon approval of the 112 application by DMG and pMG receipt of financial and performance warranty for the 112 permit, the 111 permit may by terminated. The disturbance created by the 111 operation remains. Existing highwalls appeared stable. Vegetation removal and topsoil stripping has preceded the highwall by approximately 50 yards. Topsoil material stockpile was located along the east side of the pit area. Disturbed area drainage reported to a sediment basin constructed at the southern end of the disturbed area. Weber Sand end Gravel has been crushing and stockpiling material from their nearby 110 operation IM-93-0061 at this 111 site. Crusher plant operation with several pieces of equipment were all located on a flat graded bench behind the highwall. Material stockpiles for raw material, 3 inch and .75 inch material were present. The crusher plant, stockpiles, and disturbed areas were organized, well maintained, and generally neat in appearance. The access/haul road from the 111 operation will be utilized for the 112 operation. The road was well maintained. The culvert crossing of Park Ditch appeared intact, culvert was passing flow conveyed by Park Ditch. Public notice was posted at the access road as required by Rule 1.6.21111b1. Following DMG approval of the 112 permit but prior to the commensment of mining activities, the operator must post boundary markers for the affected area and a mine identification sign which displays [he name of the operator, a statement that a reclamation permit has been issued, and the permit number as per Rule 3.1.12. Preliminary review of the 112 application identified several question that were discussed with Mrs. Kathy Weber and Mr. Mark Weber during this inspection. A summary of the discussion follows. Park Ditch is located downslope from the mining area. DMG was concerned that excessive contributions of sediment may be delivered to the irrigation ditch by surface drainage from the disturbed areas. Mrs. Weber stated that some of the slopes on which Park Ditch is located had experienced minor slope movement. Park Ditch owners have installed a culvert to contain ditch flow to ensure slope movement not disrupt the supply of irrigation waters. The section of Park Ditch contained within the culvert is located downslope from the proposed 112 disturbance; disturbed area drainage from the 112 operation will enter Park Ditch at only one location. Sediment control measures maybe required at that one location, if disturbed area drainage is routed to the ditch. According to Mrs. Weber, mining disturbance proposed by the 112 operation will not approach closer than 200 feet to Park Ditch. Disturbed area drainage will be further addressed as an adequacy question in the review process of the 112 permit. 2. Another concern identified by DMG staff dealt with surface drainage from the undisturbed uplands crossing the 3:1 backfilled slopes proposed on Exhibit F of the reclamation plan for the 112 permit. DMG staff questioned if riprap lined channels on the reclaimed slopes would be necessary to ensure stability of the backfilled slopes and protect [he prevailing hydrologic balance. The upland areas were briefly inspected. The upland watershed contributing drainage to the reclaimed area is characterized as being small in size, well vegetated, lacking is steep slopes with permeable surface soils. Such conditions are generally not associated with watersheds that produce high levels of runoff. Mr. Mark Weber stated that riprap lined channels would be installed on the reclaimed slopes if such measures were necessary. Permanent drainage control issues will be further addressed as an adequacy question in the review process of the 112 application. I & E Contact Address cc: Tom Gillis, DMG ^ CE NAME Ms. Kathrvn Weber ^ BL OPERATOR Donald &Kathrvn Weber & Sons, dba Weber Sand and Gravel ^ FS STREET Rt. 2. Box 296 ^ HW CITY/STATE/ZIP Paaosa Sorines, CO 81147 ^ HMWMD ICHI ^ SE ^ WOCD (CHI ^ OTHER