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Argentine Pass <br />OPERATIONAL INFORMATION <br />The City of Golden opens Vidler Tunnel for dive rsion as soon as legally possible, based on the <br />stipulations of associated water rights. The t ypical diversion season for Vidler Tunnel is June <br />through August. Once opened, Vidler Tunnel di scharges continuously until snowmelt runoff <br />ends or the tunnel is closed. Th e peak discharge occurs in late-J une or early-July and the flow <br />tapers off to zero in September. <br />Vidler Tunnel does not interact with any other transmountain divers ions. The City of Golden has <br />operated Vidler Tunnel for only one season. As Golden continues to op erate the tunnel the <br />operating strategy will be adjusted so as to optim ize the use of the transmountain water. In all <br />years, the goal will be to fill Eastern Slope re servoirs through the spring runoff period. Golden’s <br />Eastern Slope reservoirs include Upper Urad, Lower Urad, and Gu anella Reservoirs. Some of <br />the water transported through the tunnel is deliv ered through contract obligation to downstream <br />parties. Contract delivery obligations for Vi dler Tunnel water include Clear Creek County, St. <br />Mary’s Water and Sanitation, Coors, and Clear Creek High School. Vidler Tunnel water used by <br />Golden is diverted through the Golden City D itch where it may be used for a variety of uses <br />including but not limited to golf course irrigation and municipal water supply. <br />Where to find more information <br />Specifics relating to the data collection and f illing processes used in the determination of <br />the best source of data are presented in the SPDSS Task 4 Memorandum – Identify and <br />Fill/Resolve Conflicting R ecords for Key Transmountain Diversion Structures. <br />Additional information on ditch and reservoi r operations within Water District 7 is <br />presented in the Water District 7 Meeting Notes prepared for SPDSS Task 3 – Identify <br />Key Diversion Structures. <br />COMMENTS AND CONCERNS <br />None. <br />VidlerTunnel.doc 8 of 10 <br />