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<br />Water Supply Reserve Account - Grant Application Form <br />Fonn Revised May 2007 <br /> <br />most problematic collection system segments where structurally failing VCP exists together with <br />extremely flat grades, reverse grades and low spots resulting in significant ongoing sludge accumulations <br />and substantial root intrusions. Those segments incorporated into the study's priority list represent the <br />most severe of the city's overall collection system. Several additional segments not included in the listing <br />also warrant replacement, but are not incorporated as a result of realistic budget limitations. Priority Nos. <br />2 through 9 are those segments that pose the potential of actual structural failure and represent <br />significant maintenance obligations on the part of the community. The project consists of replacing those <br />segments of the city's sanitary sewage collection system that fall in the Priority No. 2 through 4 <br />recommended work. In the event project funds are available to accomplish additional work, added <br />segments will be incorporated for replacement in the order of their prioritization contained within the <br />study. The replacement sections include 8-inch, 1Q-inch and 12-inch VCP sanitary sewage collection <br />system piping and deteriorating brick and mortar manholes. These failing components will be replaced <br />with new PVC pipe, 4-foot ID diameter precast concrete manholes, service connections to existing <br />services and associated piping together with surface restoration including asphalt replacement as <br />appropriate. The majority of the segments fall within alleys which pose a challenge for construction given <br />the limited working area. By undertaking these improvements, the city will experience a reduction in <br />operation and maintenance costs associated with the most problematic sections of the collection system <br />thereby reducing the amount of backups brought about by significant root intrusions, sludge <br />accumulations and pipe failures. By replacing the most problematic sewer mains, such will provide a <br />significant reduction in the potential health hazards associated with the existing sewer system resulting in <br />enhanced protection to the general public's health, safety and welfare. This project will enhance the <br />city's ability to adequately collect and convey the wastewater generated by the city's users. In addition, <br />one of the priorities contained within the study is the removal of accumulated biosolids within Cell No. 1 <br />of the treatment facility. <br /> <br />The project includes replacing several sections of the city's sanitary sewer collection system, <br />rehabilitating the existing north lift station, replacing the South lift station and installing a refrigerated <br />composite sampler at the wastewater treatment facility. The vast majority of the collection system <br />appears to have been installed in the early 1900s and consists of vitrified clay pipe with brick and mortar <br />constructed manholes. The components of the system programmed for replacement contain 12-inch, <br />10-inch and 8-inch diameter piping. There are several of these segments that require quarterly, <br />semiannual and annual attention in the form of jet rodding. The jet rodding typically produces large <br />pieces of roots in addition to numerous pieces of broken clay pipe. A Preliminary Engineering Report <br />has reviewed the city's entire sanitary sewage collection system. The South lift station is showing signs <br />of deterioration and aging in addition to the influent and effluent pipe crossings underneath the railroad <br />right-of-way being structurally questionable. The combination of these factors documents the need to <br />replace the lift station on the opposite side of the railroad right-of-way. In addition to this lift station, the <br />North lift station is in need of rehabilitation. The rehabilitation will extend the life expectancy of the lift <br />station into future years. These improvements coupled with a composite sampler for the wastewater <br />treatment plant form the Priority NO.1 improvements. In addition to the lift stations, a sizeable portion of <br />the collection system is in dire need of replacement. The segments of the system programmed for <br />replacement in this project have been defined in a range of priorities from Priority NO.2 through 9. They <br />represent mains that are in extremely poor condition structurally, have unacceptably flat grades or <br />reverse grades, low spots, separated joints and experience significant problems. Given these conditions, <br />the project is programmed to address these sections within the system first. The goal of the project is to <br />eliminate the sections of collection system that pose a problematic condition in terms of human health <br />and safety, elevated operation and maintenance costs, low velocities and ponding wastewater resulting <br />in frequent backups. The conditions of the mains result in the potential of exfiltration from the sewer <br />lines. As a result of these improvements, the city will experience a decrease in the amount of <br />problematic conditions, a reduction in operation and maintenance costs, reduce the current health risks <br />and achieve improved service to the city's users. As much sanitary sewage collection system <br />replacement will be integrated into the project as the budget will accommodate. The initial work will <br />consist of Priorities 1 through 4. The hope is that additional replacement work can be undertaken to <br /> <br />F:\WPDATA\Las Animas\Wastwater\06 SSCoI\Financial\Roundtable\06-07 Application (may 07).doc <br /> <br />9 <br />