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been installed to ensure that surface runoff from the area <br />meets effluent standards, Information regarding this area is <br />found in Section 2.05.3(4) of the permit. (4.05.2(3>(b)(i)). <br />Diversions and Conveyance of Overland Flow <br />All diversions within the permit area are designed and <br />constructed in accordance with Rule 4.05.3. Design <br />information is found in Section 2.05.3(4), Map 4 and <br />Exhibit 7 of the permit (4.05.3) <br />Stream Channel Diversions <br />The Division has approved two permanent diversions. These <br />diversions divert undisturbed area drainage around the <br />reclaimed bench and fill areas and are designed to carry <br />runoff from a 100-year, 24-hour storm event. Keeping surface <br />water away from the fill slope increases the stability of the <br />fill. These diversions are consistent with applicable state <br />law, will not diminish downstream water rights and meet the <br />requirements of Rule 4.05.4. <br />Sediment Ponds <br />A single sediment pond catches runoff from nearly all of the <br />disturbed area at the reclaimed mine site. The pond has a <br />gated two-inch CMP primary spillway which is mounted and <br />braced inside a 30-inch CMP emergency spillway. This <br />configuration was approved when the discharge structures were <br />modified in 1992 to accommodate a change in Rule 4.05.6(3)(d). <br />Construction of a second closed spillway would have required <br />disturbing a major portion of the embankment/road and <br />threatening the stability of that structure. An open <br />spillway was not feasible because the access road to the mine <br />passes across the pond embankment. Information regarding the <br />pond is contained in Section 2.05.3(4) and Exhibit 5 of the <br />permit. <br />Acid-Forming and Toxic-forming Spoil <br />No acid- or toxic-forming spoil was generated at the Fruita <br />Mine. Material in the pre-law fill below the mine bench was <br />analyzed in 1989. The material is slightly alkaline and <br />shows no apparent toxicity to plant species in the <br />reclamation seed mix (4.05.8) <br />Surface and Ground Water Monitoring <br />Because no potential effects of this operation on the <br />quantity or quality of ground water or of the recharge <br />capacity of the area can be reasonably predicted and because <br />the mine site has already been reclaimed pricy to issuance of <br />this proposed decision, the Division is approving the permit <br />without a ground water monitoring plan (4.05.13(1)). <br />~- <br />