Location: Sarpy County, Nebraska
Client: Papio-Missouri River Natural Resource District
In the 1950s, the US Army Corps of Engineers (USACE) completed a flood control project which involved the construction of the Sand Hill Ditch. Due to significant slope found in portions of the USACE project area, four large concrete drop structures were installed on the Sand Hill River as part of the flood control project. During normal flows, each of these concrete drop structures create a vertical drop of approximately five feet. Since the original construction of the Sand Hill Ditch by the USACE, the channel has downcut significantly, causing bank stability issues and subsequent slope failures as the slopes became steeper and the channel bottom became lower.
The spring of 2009 brought record flooding of the Red River in Hendrum, MN. Significant emergency measures, including emergency levees and sandbagging, were completed by the City of Hendrum and hundreds of volunteers. Following this historic event, the City and the Wild Rice Watershed District began the process of bringing permanent protection to the residents of Hendrum.
In 2019, the IWI hired HEI to develop a web-based GIS solution called the "IWI Map Portal" to help water resource managers and the public access GIS data in the Red River of the North Watershed.
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