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Olmsted Power Plant Penstock Condition Assessment and Replacement

机译：Olmsted Power Plant Penstock条件评估和更换

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The Olmsted Hydroelectric Power Plant was originally constructed in 1904 at the mouth of Provo Canyon in Utah, and has been in operation for over 100 years. The power plant is a key feature of the Central Utah Project and continuing the operation of the power plant and upstream penstocks is critical to maintaining the 429 cfs water right associated with the power plant that allows the Central Utah Water Conservancy District (District) to deliver water to customers located along the Wasatch Front. The power plant and penstocks have operated well beyond their useful life expectancy. In an effort to determine the most efficient future operation and management of the facility, the District completed a comprehensive condition assessment of the existing power plant and upstream conveyance system including: three 48-inch diameter and one 72-inch diameter riveted steel penstocks, a hydraulic regulating structure (pressure box) that provides approximately 325 feet of head for the power plant, a 900 foot long non-pressurized limestone rock tunnel, approximately 1,700 feet of existing 102-inch diameter concrete encased steel pipe, and an overflow cliff spillway structure. This paper summarizes the condition assessment and presents the recommendations for replacing the existing penstocks, pressurizing the existing rock tunnel, modifying the cliff spillway structure, and the hydraulic and surge considerations related to operation of the hydroelectric power plant. Since the Olmsted Power Plant was constructed in the early 1900s and design or as-built drawings were not available, the evaluation included a three dimensional (3D) Light Detection and Ranging (LiDAR) survey of the interior and exterior of the hydraulic structures, rock tunnel, and cliff spillway structure. The condition assessment evaluation resulted in a recommendation to replace the existing power house and penstocks with a new hydroelectric power plant and a new 84-inch diameter steel penstock. The pressure box was removed, the overflow elevation of the cliff spillway structure was increased, and the system was transitioned to downstream flow control at the power house to eliminate the unbalanced flow operation of the existing system. This paper provides a detailed discussion of key issues and project challenges associated with the rehabilitation and replacement of a historical power plant from the viewpoint of the Owner and the Engineer.
机译：OLMSted水电站最初于1904年在犹他州普罗沃峡谷口中建造，并在运作超过100年。该电厂是犹他州犹他州项目的关键特征，继续运行电厂和上游栏的操作对于维持与允许犹他州水利区（区）提供的电厂提供的429 CFS水权。沿着母乳炉前面的顾客的水。电厂和钢笔经营超出了他们使用的预期寿命。为了确定设施的最有效的未来运营和管理，该区完成了现有电厂和上游运输系统的全面条件评估，包括：三个48英寸直径，直径为72英寸直径铆接钢钢板，a液压调节结构（压力盒）为电厂提供大约325英尺的头部，一个900英尺长的非加压石灰岩岩隧道，大约1700英尺的现有102英寸直径混凝土封装钢管，以及溢流悬崖溢洪道结构。本文总结了条件评估，并提出了更换现有乒乓球的建议，加压现有的岩石隧道，修改悬崖溢洪道结构，以及与水力发电设备的操作相关的液压和浪涌考虑。由于Olmsted发电厂于1900年代初构建并且设计或竣工图纸不可用，因此评估包括三维（3D）光检测和测距（LIDAR）液压结构的内部和外部的调查，岩石隧道和悬崖溢洪道结构。条件评估评估导致建议用新的水电站和新的84英寸直径的钢管替换现有的电力房屋和压路机。除去压力箱，悬崖溢洪道结构的溢出升高增加，并且系统转变为电力房屋的下游流量控制，以消除现有系统的不平衡流动操作。本文从主人和工程师的角度提供了与康复和替换历史电厂相关的关键问题和项目挑战的详细讨论。

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