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首页> 外文会议>Collaborative management of integrated watersheds >HALL BROOK DAM REMOVAL: A CASE STUDY IN SEDIMENT MANAGEMENT
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HALL BROOK DAM REMOVAL: A CASE STUDY IN SEDIMENT MANAGEMENT

机译：拆除霍尔大坝：以泥沙管理为例

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摘要

A case study evaluating the design challenges involved with removing a small dam located in a narrow stream corridor just upstream of a densely-populated section of the Town of Adams, Massachusetts. The 24-foot high, 135-foot long stone masonry dam was built in the late 19th century, and was in a state of gradual failure. Based on numerous visual inspections, the dam was considered to be in "Unsafe" condition, and the Owner was required to completely repair or remove the dam.rnBased on preliminary and design-stage alternatives analyses, a dam breach and stream restoration design was developed to restore the site to its natural condition and eliminate the dam as a regulated structure. Despite the generally accepted notion that dam removal is an overall benefit to the environment, several local, state, and federal environmental permits were required to conduct the work.rnA unique aspect of this project was the challenge of reconstructing the stream channel through the former impoundment area-a two-acre impoundment that had completely filled with sediment. The project involved careful management of the impounded sediment to protect against sediment transport, and potential damage to nearby public utilities, neighboring residences, and upstream and downstream roadway culverts. A combination of stream diversion and sediment excavation "in the dry", and a step-pool restored stream was used to restore the former impoundment area. The dam removal and stream channel construction work was completed in the Fall of 2009, with additional restoration work to be performed in the Spring of 2010.
机译：一个案例研究评估了设计挑战，该挑战涉及拆除位于马萨诸塞州亚当斯镇人口稠密地区上游狭窄河道中的小水坝。这座高24英尺，长135英尺的砌石大坝建于19世纪后期，处于逐渐失效的状态。根据大量的目视检查，大坝被认为处于“不安全”状态，要求业主完全修复或拆除大坝。rn根据初步和设计阶段的替代分析，开发了大坝破坏和溪流恢复设计将场地恢复为自然状态，并消除大坝作为受管制的结构。尽管人们普遍认为拆除大坝对环境总体有利，但仍需进行几个地方，州和联邦的环境许可。该项目的一个独特方面是通过前一次蓄水来重建河道的挑战。面积-占地2英亩的蓄水池已完全充满了沉积物。该项目涉及对蓄积的沉积物进行仔细的管理，以防止沉积物的运输，以及对附近的公用事业，邻近住宅以及上游和下游道路涵洞的潜在损害。引流和泥沙开挖“干燥”的结合，以及分步池恢复的流用于恢复以前的蓄水区。大坝拆除和河道建设工作已于2009年秋季完成，而其他修复工作将于2010年春季完成。

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