详情

原文传递 Kansas City Engineer District Renews Missouri River Sand Dredging Permits

题名：	Kansas City Engineer District Renews Missouri River Sand Dredging Permits
正文语种：	eng
摘要：	The Kansas City Engineer District has renewed permits for six commercial dredging companies currently authorized to extract sand and gravel from the Missouri River. Their existing permits, which expire April 30, 2021, authorized the extraction of up to approximately 5.99 million tons per year. The renewed permits authorize extraction of up to approximately 5.75 million tons per year. The district evaluates the potential effects of dredging on the Missouri riverbed in five distinct segments - the St. Joseph, Kansas City, Waverly, Jefferson City and St. Charles segments - and adjusts dredging locations and quantities to maintain stable bed elevations. After the most recent assessment, the district closed approximately 154 miles of the Missouri River to dredging and limited the quantity at other locations. Areas with stable riverbed elevations remain largely unchanged from previous permits. This survey indicated pronounced bed degradation upstream in the St. Joseph and Kansas City segments and less pronounced degradation downstream in the Waverly, Jefferson City and St. Charles segments. The district determined that reduction in dredging locations and quantities are necessary to protect the public interest, including impacts to navigation, bank stabilization and levees.
出版年：	2021
期刊名称：	The Waterways Jouranl
卷：	134
期：	51