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Three Rivers (Little Sioux)

Image capture of Three Rivers (Little Sioux)


Size (acres):  Harrison

River Mile:  669.4 to 670.0

Bank:  Left descending bank

County:  Harrison

State:  Iowa

Ownership, Management and Access

Ownership:  State of Iowa

Acquisition Status:  Easement donated to the Corps in 2010.

On-Site Management:  Iowa Department of Natural Resources (IDNR) administers and/or performs operation and maintenance activities on behalf of the Corps according to the terms of various agreements.

Site Access: 

  • No motor vehicles are allowed on the site.
  • The site is only accessible by boat.

Description, Use and Regulations

Description:  The Three Rivers (Little Sioux) site is located along the left descending bank of the Missouri River. The development of the site consists of channel widening through means of revetment lowering. The project has created between 6 and 9 acres of shallow water habitat to benefit the endangered pallid sturgeon, their prey and water fowl and terrestrial animals in the area.

  • This project design incorporated a significant amount of large woody debris structures as well as an undulating bottom and meandering shoreline.
  • The purpose of these features is to add depth and habitat diversity within the project. It is believed that these changes will help to create a more ecologically significant impact. Rock structures provide shallow water habitat, serve as a visual marking for the navigation channel and address public safety. 

Status:  Open to the public. Site/Habitat is in operations and maintenance status.

Site Use:  The site is open to the public for a variety of outdoor activities including fishing, bird watching, hiking and hunting (under special regulations).

Site-use Regulations:  

  • People visiting these areas must comply with all applicable federal and state laws and regulations, including hunting, fishing, etc.  In general Title 36 Part 327 of the Code of Federal Regulations governs the use of Corps property.  Other regulations may apply to properties owned by other federal agencies.
  • Special regulations and restrictions may be posted on site.

Special-use Regulations:  See above.

For More Information

Contact Information: 

  • Contact Iowa Department of Natural Resources at (712) 420-2437 or connect to the IDNR web document.

Story Maps Link:  http://rsgisias.crrel.usace.army.mil/story_maps/nwo/mrrp/index.html#

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