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              Congressional                                                      ____
           ~   Research Service






U.S. Army Corps of Engineers Civil Works:

Primer and Resources



Updated July 20, 2023

Congress plays a role in the nation's water resource development through authorization and
appropriations of U.S. Army Corps of Engineers (USACE) projects and activities, as well as support for
other agencies with water resource-related activities. USACE is a Department of Defense (DOD) agency
that develops civil works projects principally to improve navigable channels, reduce flood and storm
damage, and restore aquatic ecosystems.
The Assistant Secretary of the Army for Civil Works (ASACW) provides policy direction and supervision
of USACE  civil works. A military Chief of Engineers manages USACE's civil and military missions.
USACE's  38 district offices work with nonfederal project sponsors.
Standard USACE  project delivery consists of USACE leading the study, design, and construction of
authorized projects. Nonfederal project sponsors typically share in study and construction costs, including
providing real estate. Nonfederal sponsors generally perform operation and maintenance (O&M) for flood
risk reduction and ecosystem restoration projects. USACE typically performs O&M for navigation and
some multipurpose projects, such as dams. USACE operates more than 700 dams and maintains more
than 900 coastal, Great Lakes, and inland harbors, as well as 12,000 miles of inland waterways.
USACE   projects typically require two separate congressional authorizations-one for studying feasibility
and one for construction-and appropriations for both. This Insight summarizes the USACE authorization
and funding processes and provides links to related resources.

Project   and  Programmatic Authorization

Most USACE   projects start with congressional authorization to conduct a feasibility study of a water
resource issue. If a feasibility study is funded, USACE evaluates alternatives to address the issue and
recommends  one alternative for construction. The Chief of Engineers then signs a recommendation for
project construction (i.e., the Chief's report) and transmits the completed study and the Chief's report to
congressional authorizing committees, which consider whether to authorize project construction. If
project features or estimated costs change significantly after authorization, additional congressional
authorization may be necessary to modify the project authorization.


                                                                Congressional Research Service
                                                                  https://crsreports.congress.gov
                                                                                      IN11810

CRS INSIGHT
Prepared for Members and
Committees of Congress

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