Rock Island District Public Notices

Little Walnut Creek Stream and Wetland Mitigation Bank (CEMVR-RD-2023-0482)

Rock Island District
Published April 19, 2023
Expiration date: 5/18/2023

Project Location: The proposed site is located within Section 22, Township 79 North, Range 26 West, Dallas County, Iowa. 

Bank Objectives: The fundamental objective of compensatory mitigation is to offset environmental losses resulting from unavoidable impacts to waters of the United States (WOTUS) authorized by Department of Army Permits. Other Objectives include restoration and enhancement of wildlife habitat; restoration and increase of aquatic resource functions lost from anthropogenic activities; increase of public resource functions, values, and resource stewardship awareness; reduction of sediment and nutrient loading; and the restoration of floodplain connectivity.

Project Description/Bank Establishment: The bank sponsor proposes to complete activities on 90 acres of publicly owned property that would result in the establishment of both stream and wetland mitigation credits. The goal of this project is to restore 2,333 linear feet of Little Walnut Creek and four adjacent tributaries to generate an initial estimate of 98,194.45 stream credits. The bank sponsor proposes to use many different in-stream methods to aid in restoring these portions of stream, including re-meandering it to restore natural sinuosity to the channel and decrease the slopes. The sponsor also proposes to improve floodplain connectivity, install floodplain benches, and improve habitat by creating wood riffles and toe wood within the stream. Improvements to the riparian buffer include vegetation management to remove invasive species and promote native species diversity. Another goal of this project is to enhance an adjacent wetland and wetland buffer to generate an initial estimate of 7.85 emergent wetland credits. A wetland delineation has not been completed on this site but will be completed prior to the submission of the draft mitigation bank instrument.

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