Section 1135 Projects (Project Modifications for Improvements to the Environment) - Overview

Rock Island District
Published Oct. 1, 2021
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United States


Section 1135 of the 1986 Water Resources Development Act, as amended, provides authority for the Corps of Engineers to determine the need for project modifications in the structures and operations of existing Corps of Engineers projects for the purpose of improving the environment in the public interest. Measures at other locations that have been affected by the construction or operation of the project can be undertaken, if such measures do not conflict with the authorized project purposes.

The initial study is 100% federally funded up to
$100,000. All planning costs after the first $100,000 are cost shared 50/50. Design and construction costs are cost shared 75% Federal and 25% non-Federal. The sponsor cost share can be a contribution of cash, lands, easements, rights-of-way, relocations, disposal areas (LERRDs) or work-in-kind. Work-in-kind may be provided subsequent to the execution of the Project Partnership Agreement (PPA), and the value may not exceed 80% of the non-Federal share.

Formal assurance of local cooperation, a Project Partnership Agreement (PPA), must be furnished by a local sponsoring agency. The sponsoring agency must normally agree to the following:

  1. Provide without cost to the United States all LERRDs necessary for the construction and subsequent maintenance of the project;
  2. Maintain and operate the project after completion without cost to the United States; Assume responsibility for all costs in excess of the Federal cost limitation of $10 million;
  3. "Work-in-kind" contributions from the sponsor may be negotiated; and,
  4. If the value of the sponsor's contribution above does not equal or exceed 25 percent of the project cost, provide cash contribution to make the sponsor's total contribution equal to 25 percent.

An environmental improvement project under Section 1135 can be initiated upon receipt of a request from a prospective local sponsor. Section 1135 project requests should be directed to:

U.S. Army Engineer, Rock Island District Clock Tower Building
P.O. Box 2004
Rock Island, Illinois 61204-2004
(309) 794-5704




Potential new start for this program is Sabula Lakes

Additional Information


Section 1135 of the 1986 Water Resources Development Act

Summarized Project Costs

Estimated Federal Cost


Estimated Non-Federal Cost


Estimated Total Project Cost


Allocations Prior to FY 2022


FY 2021 Allocation


FY 2022 Allocation


FY 2022 President’s Budget


FY 2022 Total Capability



Major Work Item Current Year

FY 2022: No specific project work completed.  Coordinate with communities to identify potential new projects for consideration.