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t 1 SYSTEM DESCRIPTION As shown on Figure 1a, the water handling facilities at the mill consist of two water storage reservoirs, interceptor canals and pipelines, and a large tailings impoundment. The primary purpose of these facilities is the following: 1. Tailing Deposition and Storage t 2. Process Water Circulation and Storage 3. Fresh Water Bypass 4. Flood Control 1 1 1 1 1 Ute Creek Reservoir, with a storage capacity of about 100 acre-feet, is located on the main stem of Ute Creek, upstream of the mill facilities. This reservoir impounds fresh water that is delivered to the Williams Fork River through a series of ~:ulverts and pipelines. Flood flows in excess of the 200-year snowmelt flood will be discharged through the emergency spillway into Ute Creek that flows into the tailing Fond bypass canal. East Branch Reservoir, with a storage capacity of about 2,000 ;acre-feet, is located on the East Branch of Ute Creek. This reservoir is used for process water storage and flood control. The flow of the East Branch of Ute Creek and other fresh water tributaries to the reservoir is intercepted above the reservoir and byp~issed to the Williams Fork River. Flood flows in excess of the 200-year snowmelt flood will spill from the interceptor into the reservoir. If the reservoir spills through the emergency spillway, the flow will end up in the tailing pond. The fresh water bypass system also includes the interception and b~~pass of the flow of an unnamed tributary to Ute Creek that is referred to as the Horse:;hoe Intake. This flow is also diverted to the Williams Fork River. Flows in excess of the 200-year snowmelt flood spill into the East Branch of Ute Creek and eventually into the tailing pond. A fresh water interceptor canal also extends around the entire tailing basin to control the intake of water into the process water system. This canal begins at Ute 3