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Highland Ditch (Structure ID 0500526). A few years of C-BT Project water to the St. Vrain <br />Palmerton Ditch (Structure ID 0500528) for Other (Use Code: Q), non-specified uses. <br />The City has plans to update the North and South treatment plants. A new treatment plant is <br />currently under construction north of Highway 66 and east of North 53rd Street. The new <br />treatment plant is anticipated to replace the South treatment plant in the next few years. The <br />individual treatment plants are not anticipated to be explicitly modeled in for the SPDSS effort. <br />The City of Longmont's ability to use water in the model from Southern Water Supply Pipeline <br />via Burch Lake, the Highland Ditch, and St. Vrain Palmerton Ditch through the Wade Gaddis <br />Plant will be enabled with operating rules, as discussed in the Operating Information section. <br />3) Ralph Price Reservoir (Structure ID 0504010) <br />Ralph Price Reservoir is the City's major storage unit; <br />an on-channel reservoir on the North Fork St. Vrain <br />Creek about two miles upstream of the North Pipeline. <br />Water released from Ralph Price Reservoir is <br />temporarily stored in a small, regulating reservoir <br />(Longmont Reservoir, see Figure 1) prior to being <br />conveyed through the North Pipeline to municipal <br />users. Ralph Price Reservoir is held back by a 210- <br />footearthen dam that was constructed in the late- <br />1960s, with water first stored in 1969. <br />~..._ - <br />'~"~y., - r=te -., <br />- ~~" +~ <br />Figure 2 -Ralph Price Reservoir <br />http://www.ci.longtnontco.us/city clerk licenses/fishing <br />Specifics regarding Ralph Price Reservoir include the following: <br />• 16,197 ac-ft total capacity <br />• Maximum surface area of 222 acres <br />• Approximately 30 ac-ft dead storage <br />• Maximum outlet capacity of 865 cfs <br />An elevation-capacity curve for Ralph Price Reservoir was provided by the City of Longmont. A <br />subset of the data points on the curve is included in Table 1. The Water Commissioner does <br />charge the City for evaporative losses from the reservoir. <br />City of Longmont Operating Memorandum.doc Page 6 of 21 March 2, 2005 <br />