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The first alternative includes estimating the cunent storage capacity of the reservoir to deternline <br />if the reservoir can store 202.77 acre-feet of water if the dam and spillway are raised as <br />recommended in the 1987 Feasibility Study. If not, the feasibility of removing sediment from the <br />reservoir to achieve this goal will be investigated. The other two alternatives involve <br />investigating the feasibility of increasing the storage volume of the reservoir by raising the dam <br />and spillway above the elevation recommended in the original Feasibility Study by 1 feet and 2 <br />feet, respectively. These alternatives would hopefully eliminate the need to remove sediment <br />from the reservoir. The construction cost of all of the alternatives will be determined, as well as <br />a logical construction sequence for the chosen alternative. In order to remain consistent, the <br />methods used to investigate the alternatives will be the same as those used in the 1987 Feasibility <br />Study. <br />The City intends to obtain a construction loan from the CWCB to complete the dam <br />rehabilitation. The financial impacts to the City of Victor are addressed later in this report. A <br />cash flow projection has been prepared over the period of debt retirement of the loan which is <br />expected to be 30 years. The financial impacts of the project on the City and their ability to pay <br />back the loan aze also addressed. <br />IV. HYDROLOGY <br />The hydrology developed for the 1987 Feasibility Study was used to study the alternatives for <br />this update. The storm hydrographs were developed and routed through the reservoir using the <br />U.S. Artny Corps of Engineers HEC-1 Flood Hydrograph Package (Reference 2). Rainfall date <br />obtained for the Probable Maximum Precipitation (PMP) was developed from the <br />Hydrometerological Report No. 55 prepared by the U.S. Army Corps of Engineers in March of <br />1984 (Reference 3). The stage storage curve used for the reservoir routing was obtained from the <br />City of Victor. Storage volume data was available up to elevation 10,392 which is the historical <br />spillway crest elevation before the crest was lowered. Storage volumes above elevation 10,392 <br />were interpolated using the 1984 USGS Pikes Peak Quadrangle Map. Stage storage and area <br />capacity curves are presented on Figure 2. A more detailed description of the hydrology is <br />included in the 1987 Feasibility study and a summary of the peak dischazges determined in the <br />1987 Feasibility Study are presented in Table 1. <br />3 <br />