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Upper Decatur Bend

Image capture of Upper Decatur Bend


Size (acres):  642.68

River Mile:  River portions are along 689.5 to 691.5

Bank:  Left descending bank

County:  Monona

State:  Iowa

Ownership, Management and Access

Ownership:  State of Iowa and private owner

Acquisition Status:  Easements acquired by the Corps in 2000 and 2003.

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

Site Access: 

  • Only the state-owned portion is accessible to the public.
  • Motor vehicles are restricted to established roadways and parking areas.
  • A small portion of the southeast corner is private and is not available for public use.

Description, Use and Regulations

Description:  Upper Decatur site is part of the Blackbird-Tieville-Upper Decatur Bends complex. The USACE acquired easement from the state of Iowa at Upper Decatur for implementation of project features.

  • Historically, the BTD bends formed a complex that contained side channels which spread the river across the flood plain. The entire BTD Bend is comprised of multiple parts spanning almost 8 river miles with the Upper Decatur portion spanning approximately one river mile. 
  • Highway 75 crosses this site from east to west and provides access from Iowa to Nebraska. Project features consist of culverts under Highway 175 to provide a hydraulic connection between the backwater areas in Tieville and Upper Decatur Bend to the south, and nine flow-through weir structures for potential fish passage.
  • Management objectives for the Upper Decatur Bend site are restoring and managing habitat primarily for waterfowl and other migratory birds and maintaining the backwater areas for spawning and foraging of fish.  

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

Site Use:  The public area is available for a variety of outdoor activities including bird watching, hiking, fishing 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 visit the IDNR web document.

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

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