Overview of Qualifications: Water Resouce Planning Services Apr 2003

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Sample Water Resources Projects - Continued temporary source of water for its northern sections, delaying the construction of a fourth city filtration plant. Final designs are being prepared for a 308 - foot -high RCC dam and 24,000 - acre -foot reservoir. Boyle is the District's technical consultant and is also designing the 54- inch - diameter downstream raw water delivery pipeline and 80 MGD membrane treatment plant. Boyle also established the size of the raw water pumping facilities and transmission pipelines, performed hydrologic studies to determine the size of the emergency spillway, and dam break analysis to map the inundation limits downstream of the dam. Monument Lake Dam Rehabilitation Monument Lake Dam is located in the Town of Monument, Colorado. The dam is classified as a small Class II structure with a height of 41 feet impounding 350 acre -feet at the spillway crest. The zoned dam embankment has a crest of 20 feet wide with a length of 900 feet. The Colorado State Engineer's Office (SEO) considers Monument Lake Dam to be in very poor condition due to inadequate spillway capacity and tree growth on the embankment. The reservoir is presently under state restriction; the water surface must be kept three feet below the spillway crest. On May 6, 1998, the SEO recommended a zero - storage restriction due to the poor condition of the dam. This recommendation has not yet been enforced but SEO could do so at any time. The purpose of the feasibility study was to select a financially sound alternative to rehabilitate Monument Lake Dam, which would enable El Paso County and the Town of Monument to ensure present and future public safety. Based on previous reports and site inspections the following deficiencies of Monument Lake Dam, were addressed: • Deteriorated outlet works • Absence of outlet energy dissipating structure • Unacceptable tree growth on dam embankment • Inadequate protection from wave action on upstream face of dam • Spillway capacity inadequacy The study was prepared in conformance with dam safety regulations of the SEO. This study examines the feasibility of non - structural and structural alternatives; and demonstrates the technical, financial, environmental, and institutional feasibility of rehabilitating the existing dam and appurtenant structures. Through the use of a hazard classification study and an incremental damage analysis, the existing 100 -year spillway capacity was justified for the reclassification to a small Class III dam for existing and future downstream developments. -18- is VLLW