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designed, constructed, and maintained in accordance with applicable regulatory requirements. <br /> The Division also finds that planned demolition and reclamation of facility areas are sufficient to: <br /> • Prevent damage to fish, wildlife, and related environmental damages and prevent <br /> additional contributions of suspended solids to streamflow or runoff outside the permit <br /> area (Rule 4.04(1)). <br /> • Control and minimize diminution or degradation of water quality and quantity (Rule <br /> 4.04(2)). <br /> • Control and minimize erosion and siltation (Rule 4.04(3)). <br /> • Control and minimize air pollution (Rule 4.04(4)). <br /> • Prevent damage to public or private property (Rule 4.04(5)). <br /> • Minimize damage, destruction, or disruption of services provided by wells, pipelines, <br /> railroads, electric lines, and telephone lines (Rule 4.04(6)). <br /> III.Hydrologic Balance Rule 4.05 <br /> The Permit is found to be in compliance with the requirements of Rule 4.05. <br /> A. Water Quality Standards and Effluent Limitations -Rule 4.05.2 <br /> There are 10 outfalls currently approved at the Colowyo Mine. These outfalls correspond to sediment <br /> ponds listed below in Section D and sumps adjacent to Taylor Creek. The outfalls are monitored for <br /> water quality as part of Colowyo' s Colorado Discharge Permit System (CDPS) permit no. CO- <br /> 00458161. The Division's review of Discharge Monitoring Reports associated with CO-00458161 <br /> indicated an exceedance of limitations for Total Suspended Solids (TSS) at East Taylor Pond (outfall <br /> number OIOA). Based on a memorandum of understanding with the Colorado Water Quality Control <br /> Division (WQCD) and the Division, the WQCD is responsible for enforcing CDPS permit <br /> conditions. No violations were issued by WQCD in association with CO-00458161 during the 2022- <br /> 2027 permit term. <br /> Colowyo's current CDPS permit and plan associated with the Collom Pit area is under review by the <br /> WQCD. <br /> Surface drainage from all disturbed areas passes through sediment ponds with some exceptions. The <br /> Division has granted Small Area Exemptions (SAES) for some areas on the mine site. SAES include <br /> the area along the East Side Collection Ditch, the topsoil stockpiles along Haul Road A, and the East <br /> Taylor Holding Pond and pump station (shown on Map 11 and Map 12 of the PAP). Additionally, a <br /> total of three areas are permitted as SAES in the Collom Area. The SAES include a 1.4 acre zone <br /> along the east side of the pit in Section 1, a 7.66 acre area along the east side of the pit in Section 2, <br /> and a 2.6 acre area on the west side of the pit in Section 34. These sites are relatively small and <br /> analysis indicates that standard treatment facilities (i.e., large sediment ponds) are not necessary for <br /> the drainage to meet the effluent limitations of Rule 4.05.2 and the applicable State and Federal water <br /> quality standards for receiving streams. More information on SAES can be found in Exhibit 7 of <br /> Volume 18 of the PAP. <br /> 31 <br /> Permit Revision No.5(PR-05),G 1981-019 <br />