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Project Description: This is a stream restoration project of Bear Creek. The project will utilize the Iowa River Restoration tool box. It will involve the installation of grade control structures (rock riffles), channel defining structures (J-hooks and cut-off sills), and stream toe protection; the creation of several off channel wetlands (oxbows); multi-use trail rerouting to accommodate oxbows; bank reshaping to stabilize banks; removal of invasive Japanese knotweed; and the planting of native species within the stream banks and buffer areas. The project will also involve slightly lowering the channel bottom at the 3rd Street SW bridge to increase overall low flow stream grade through the restored reach. To accommodate grading, some trees will be removed.
Purpose and Need of Project: The City was able to capture State Revolving Fund (SRF) for a water quality improvement project. Currently, the banks of this section of Bear Creek are either over-armored with revetment stone or are unstable. Invasive Japanese knotweed is present throughout. The lower reach is aggrading sediment. This project will help improve water quality through creation of off-channel wetlands, increasing sediment transport, bank stabilization (decrease sediment load), and establishment of native buffer areas.