C150367 Feasibility Study - Laserfiche WebLink

Home Browse Search

SECTION 1 - BACKGROUND PURPOSE AND NEED Ram water supply for the City of Lamar (Lamar) is provided from three well fields. Lamar owns and Dperates these three well fields: the North, Middle and South. The North and Middle Well fiek s have total dissolved solids (TDS) concentrations well above Environmental Protection Age icy (EPA) and Colorado Department of Public Health (CDPHE) secondary maximum cont iminant levels (SMCLs). The South well field has higher quality raw water and TDS levels 50°/ below the North and Middle well fields. Although the water quality is superior, the South well field is further from the Chlorine Building and the transmission line is in disrepair. The existing South well field transmission line is cons ructed of cast iron and is in extremely poor condition. The existing transmission line was insta led in 1933 as a part of the Works Projects Administration (WPA), the largest New Deal agen y program. Based on recent sampling of the existing transmission line by the Lamar Water Department and Honeywell Building Solutions, the existing south well field transmission line exhil its a significant amount of internal tuberculation (scale build -up), pin -hole leaks and press.ire drops. The high tuberculation reduces the internal diameter of the pipe and increases the fiiction head losses within the pipe, thereby increasing the pumping energy required. This onstruction project enables Lamar to parallel the existing transmission line for the South well field, and drastically reduce wasted raw water. It is estimated that 20 percent to 35 percent or 3 7 3 to 662 acre -feet per year will be saved once a new transmission line is installed. By reduc ng the amount of wasted raw water, Lamar will be able to blend a larger percentage of high quality South well field water with a smaller percentage of lower quality water from the Nortf and Middle well fields. Higher raw water quality will thus reduce necessary levels of water treatment, reduce disinfection by- products (DBPs) in the potable water and minimize scalir g in the distribution system. In adi lition to improved water quality, enhanced water conservation, and increased pumping effici ncy, a new South water transmission line will add redundancy to the South well field raw water delivery system. To make this crucial project a reality for Lamar, $150,000 is being reque ted from the Water Supply Reserve Account (WSRA) Statewide Account and $50,000 is being r quested from the WSRA Basin Account. The funds will be used for design, permitting, cons tion and project management expenses. STUD' AREA DESCRIPTION The ity of Lamar, the geographic area that will be affected, is in Prowers County in south stern Colorado. This community is the center for the predominantly agricultural econo y of the area. Lamar provides water and wastewater services to a population of 7,804 by City of Lamar Raw Water Feasibility Study — Colorado Water Conservation Board