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The Division's letter, dated January 14, 2000, indicated that. "The pond G and pond B stage/storage diagrams are legible and were signed and certified by the surveyor. " Both of these diagrams required further review once the Division received additional information sent from Montgomery Watson under sepazate cover. On January 7, 2000, Twentymile Coal Company submitted the hydrologic evaluations for Pond B and Pond G. Twentymile Coal Company stated that the pond B evaluation can be inserted into Exhibit 8J, and the Pond G drawing replaces the existing stage-storage in Exhibit 8J. A recent survey was conducted by TCC and the top of riser, orifices on riser, and emergency spillway elevations were different than reported by Epp. The design used the survey data provided by TCC and i[ shows the pond is adequately sized for the design event. Twentymile Coal Company explained that the pond was designed and constructed to accommodate the worst case runoff from the adjacent CYCC's surface mine, which is reclaimed. Afrer review of the materials submitted by Twentymile Coal Company on January 7, 2000, the Division finds that all that remains for pond B is an as-built P.E. certification which states that pond B was built in accordance with the rules and the design as presented in Exhibit 8F. Similazly, pond G also requires an as-built P.E. certification stating that the pond was built in accordance with the Rules and the design as presented in Exhibit 8J. ~62b) The Division's original, Mazch 2, 1998 question, asked, Plate 1 titled Sedimentation Ponds, Energy Mines No. l and No. 2 and Eckman Park needs to be properly labeled to indicate it is part of the Twentymile permit # C-82-0~6 and to which exhibit it belongs. If only one copy of this plate is to be used for all ponds, it should be properly referenced by the as-built certification for each pond to which it applies, as far as where it (the plate) can be found in the permit. TCC submitted Plate 1 in the December 6, 1999 submittal, to incorporate into the permit. Plate required labeling as DMG requested previously. The Plate needed additional information to indicate that the Plate only applies to Ponds C and T, as stated in the cover letter. Plate 1 also referenced other drawings (Energy Mines 1 and 2 Hydrology) which needed to be incorporated into the Foidel Creek Mine permit. All submitted pages need to have the proper exhibit number label. TCC provided responses on January l5, 2000. Twentymile Coal Company provided a Label for Plate 1 that indicates only the design for ponds C and T should be taken from it. Labels were provided to place on Plate 1 to re-name it Exhibit 8P. Map 13, Energy Mines 1 and 2, was referenced on Plate 1, and was provided with the January 15, 2000, for inclusion into the Foidel Creek Mine Permit. Twentymile Coal Company affixed labels to Plate 1 and Map 13, which resolved this concern. i 62d) The Division's Mazch 2, 19981etter asked, Pond E -Page 8-9? of Exhibit 8 disagrees with the Epp Stage-Storage diagram submitted and approved as Figure 1 of Exhibit 8E. Information conflicts regarding the top of the primary riser. The permit needs to clearly present the design information and the engineer is required to certify C: W HB\C82056\RN03\020100resp. doc