Project location: Southwest corner of NW 86th Street and NW 70th Avenue, unnamed tributary to Beaver Creek,
The applicant proposes to construct a new 34-acre residential development, including associated roadway, utility infrastructure, and re-grading of the on-site pond, at the southwest corner of NW 86th Street and NW 70th Avenue, Johnston, Iowa. The project will impact 1.42 acres of wetland and 1,330 linear feet of waters of the U.S. A 275 feet long dam with a 15 feet wide top will be constructed at the on-site pond. Twin 60” reinforced concrete pipe culverts will be installed along the north tributary to accommodate roadway construction. Approximately 190 feet of the north tributary will be relocated to accommodate the twin culverts and roadway embankment. Streambank stabilization will be placed along 190 feet of the relocated north tributary and at several other locations on the north and south tributaries.
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