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ItECLA1I~TION t~TS (revised 8/93) • EXHIBIT L Reclamation costs are estimated on having a maximum area of disturbance consisting of no more than 27.51 acres ± needing some form of reclamation at any one time. This includes areas stripped, partially mined and partially reclaimed, lake surface areas do not need reclamation. The table below outlines the baseline data we used to do our bond estimate calculation. The areas in the table are all within the mined area. This exhibit was prepared by Steve O'Brian of Environmer'rl, IltC. at the request of Albert Frei and Sons, Inc. DESCRIPTION TOTAL AREA NEEDING REVEGETATION 27.51 LAKE AREA 58.74 SEEDBED GRADING/SHAPING 7.89 UNMINED 22.05 NEEDS REBOILING 10.00 UN-SHAPED SLOPES 3,400 SLOPE FILL VOLUME 9.72 S ac. ac. ac. ac. ac. (DEPTH 5" LINEAR FEET CY/LF ESTIMATED UNIT COSTS FOR RECLAMATION ITEMS: Unit Cost 1. Revegetation activities and costs $ 500.00/AC. (includes grass seed, jeriilizer, mulch and general labor tos(s) 2. Re-spreading soil and/or growth media with scraper, haul less than 500 o.7o/YD3 i/ 3. Backfilling and shaping slopes using a D-9 dozer, push distance less than 100 ft o.6o/YD3 2/ 4. Seedbed grading and shaping 3 hrs/ac @ $80/hr. 240.00/AC. RECLAMATION COSTS 1. Revegetation costs 27.51 ac @ $500.00/acre $ 13,755.00 2. Resoiling, Haul distance - less than 500' 6,725 YD3 x 70G/YD3 4,707.50 3. Backfilling and shaping - push less than 100 ft. 33,048 YD3 x 60C/YD3 19,828.80 7. Grading and shaping, 7.89 ac. @ $240.00/ac. 1,893.60 Net Total $ 40,184.90 ADMINISTRATIVE FEES @ 19.20$ 7,715.50 SUB-TOTAL $ 47,900.40 Approximate cost at 95~ $45,505.30 RECOMMEND BOND BE SET AT a 45,500.00 11 Figured using Cat Handbook and rental costs from local sources for 83% efficiency, 641-B scraper, in the Denver Metro area. Z Figured using Cat Handbook and rental costs from local sources for 83% efficiency and a D-9 track dozer, in the Denver Metro area.