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• • (Page 2) • MINE ID f OR PROSPECTING ID ~ K-89-009 INSPECTION D;~TE 02/28/95 INSPECTOR'S INITIALS RCO OBSERVATIONS This inepect:Lon was conducted by the Division ae a follow up to a previous inspection (dated 11/30/93) during which problems were identified that were to have corrective actions completed. 7.'he operator was contacted about the inspection but was unable to be present for it. The was a little snow and ice on the ground, but that did not prevent the necessary items from b~aing inspected. The permit area consists of two separate 4-acre parcels, for a total of 8 acres. The operation ie located in an area of old dune Band deposits. The dunes are being mined down to the grade of the surrounding land. There ie no native topsoil on the sand dune land. No topsoil ie included in the reclamation plan, and none is stockpiled. There was an identifying sign posted at the entrances to each parcel. Corner markers have been correctly located and installed also. This topic had been noted ae a problem at the previous inspection (dated 11/30/93), but installation of the above-mentioned items has abated this ~~roblem. The operator was informed after the previous inspection that lack of having or inquiring about a etormwater management plan constituted a problem. The operator has subsequently contacted th~~ Water Quality Control Division, and supplied our office copy of the letter. This problem has now been abated. A problem combining the topics of erosion/sedimentation and backfill/grading has also been abated. The NW block of the permit area was not being mined, yet was not stabilized against blowing wind. The corrective actions were to grade and seed the surfaces, and report these activities. Much grading has been performed, and was reported on the annual report. There ie still a small "highwall" (about 150 ft long and average of 3 ft high) to be graded. No seeding has :oeen performed. The lower, smoother surface of this land greatly reduces the danger of wind erosion. Disturbance at this parcel ie approximately 1 acre. The SE block ie where the active mining occurs. There are approximately 2 acres disturbed. There is a portion of a 15 ft tall dune hill being mined currently. On other areas within this parcel, there has been extensive application of small limbs, grass clippings and wood chips, for soil fertility. The operator should consider beginning the seeding of these areas in the near :future, while the organic matter can benefit the establishing vegetation. There was an existing problem of lack of an adequate permit area map, noted under the topic of records on the previous report. The operator has prepared and submitted a better map, showing necessary landmarks, dimensions, features and areas of activity. This problem has therefore been abated also. The previous inspection report noted that this NW 4-acre block was to be reclaimed for an industrial e.Lte. There is a small amount of concrete riprap and other materials stored on the NW blocl: (observed at both inspections). This ie not a problem, unless it would interfere wif:h site grading during final reclamation. The materials observed oneite consist of approximately 200 cu yde of asphalt/dirt, 150 cu yds of steel-reinforced concrete, 50 cu yde of small limbo/grass, and 600 cu yds of broken concrete. The various concrete materials are recognized to be a resource in this area; the asphalt ie recyclable; and the organic debris ie bei.ng used by the operator ae a protective mulch. A nearby market or use for these materials ie fairly certain, but (except for the mulch), their removal should be bonded for. The existing bond is $800.00, which was based on a calculation of $100.00 per levelled acre, by the SCS in 1989. At present, though, this ie not considered adequate. Basing calculations on only 3 acres of disturbance, the following tasks are required: removal of 900 cu yde o1: concrete/asphalt, site grading to 3:1 elopes, application of manure or straw, and seeding ~~er the recommended mix. The figures will be sent to the operator for review. If the operator wishes to influence the numbers, some reclamation or cleanup should be performed. llt this time, the low bond (financial warranty) is not a problem. There were no other items inspected, and no problems observed. This inspector would like to thank the operator for completing the above-mentioned corrective actions in a timely manner.