Site work for a water / sewer project in Sioux City, Iowa. Conceptual plans call for site work for a water / sewer project.

Due to the recent identification of special flood hazard zones in the Hoeven Valley, the need to identify mitigation alternatives for the individual areas is necessary. An evaluation of the area was completed, and options are under consideration. A portion of the work plan was identified out of the Floyd River Flood Reduction Study completed by HR Green in August 2013. This identified project work to include berm modifications & additional culverts which will reduce the extent of the flood zone and accommodate a recreational trail. Additionally, in July 2015 HR Green completed the Leeds Area Interior Drainage Study which built upon the data collected in the 2013 study and identified in greater detail the existing conveyance network and ponding scenarios associated with many storm events. In 2018 HR Green started working towards 30% plans to submit a Conditional Letter of Map Revision (CLOMR) application to FEMA. Pending FEMA's acceptance of the modeling results, storm infrastructure upgrades, estimated at a cost of $2.6 million in FY 2013, will be completed to prevent flooding resulting from a 100-year rain event for properties in the Leeds area. These improvements include an excavated channel, approximately 500' of new 48" pipe, approximately 525' of new 60" pipe, and approximately 125' of upgraded pipe from 36" to 48". This option would still allow some ponding in the street right-of-way but remove the clear majority of the 133 properties from Zone AH. No properties would be affected by flooding of one foot or greater; however, 7 of the 133 properties would be impacted by flood depths smaller than one foot. The flooding would be limited to water slightly crossing the property line of 5 residential and 2 businesses along Floyd Boulevard and Fillmore Street. Similar work has been required for the Perry Creek area, which has lessened the flood hazard area. The City feels that when implemented this project will lead to fewer residents and businesses being impacted by interior ponding. The result of these projects will be to open development area and reduce the flood insurance requirements for individuals and businesses. Adjustments within the project budget and available cash balance will be used to cover costs of property acquisition needed for underground storage and an excavated channel The project is included in the City 2027-2031 Capital Improvement Program (CIP). As of July 10,2026, further details have not yet been identified. *Project information has been obtained through a public capital improvement plan (CIP). A CIP is a financial schedule for short- and long-range projects which is updated regularly. Information listed in the CIP often evolves based on funding availability and the project details, including timeline and value, are subject to change. The content management team will continue to pursue additional details as they become available.