Army Corps of Engineers & Federal Waterways

The U.S. Army Corps of Engineers (USACE) is one of the most consequential — and least discussed — federal agencies, responsible for managing the infrastructure that makes much of American commerce and flood safety possible. Its Civil Works program operates approximately 700 dams, 14,000+ miles of levees, 12,000 miles of commercial inland waterways, and 926 harbors, moving roughly 500 million tons of cargo per year. The Corps also generates about 24% of U.S. hydroelectric power. Beyond infrastructure, the Corps issues roughly 60,000 permit decisions per year under the Clean Water Act's Section 404 and the Rivers and Harbors Act, regulating what can be built in or near "waters of the United States" — a legal definition that has been actively litigated and rewritten, most recently by the Supreme Court's Sackett v. EPA (2023) decision, which significantly narrowed federal jurisdiction over wetlands. The Corps' flood damage reduction infrastructure is estimated to prevent over $100 billion in damages per year. Its annual Civil Works budget of $8-9 billion is consistently supplemented by emergency supplemental appropriations after major hurricanes and floods.

Current Law (2026)

Legal Authority

• 33 U.S.C. § 401 — Rivers and Harbors Act Section 10 (prohibits unauthorized obstruction or alteration of navigable waters; Corps permit required for any structure or work in, over, or under navigable waters)
• 33 U.S.C. § 408 — Taking possession of, use of, or injury to harbor or river improvements (prohibits alteration or modification of Corps civil works projects without permission of the Secretary of the Army)
• 33 U.S.C. § 1344 — Section 404 of the Clean Water Act (Corps issues permits for discharge of dredged or fill material into waters of the United States; EPA veto authority; nationwide and individual permits)
• 33 U.S.C. § 2201-2212 — Water Resources Development Act — cost sharing (navigation projects: federal 50-100%; flood control: federal 65%/non-federal 35%; harbor deepening cost shares vary by depth)
• 33 U.S.C. § 2280-2295 — Project planning and authorization (feasibility studies; Chief's Report; Congressional authorization required for projects; benefit-cost analysis requirements)
• 33 U.S.C. § 2310-2356 — Project construction and operation (construction schedules; maintenance; project modifications; deauthorization of inactive projects)

How It Works

The U.S. Army Corps of Engineers is the nation's largest water resources infrastructure agency. Its Civil Works program — separate from the Corps' military construction mission — builds and maintains the navigation channels, flood control systems, hydropower facilities, and environmental restoration projects that underpin the American economy.

The Corps' Civil Works mission centers on two interdependent infrastructure systems. For navigation, the Corps maintains over 12,000 miles of commercially navigable inland waterways — the Mississippi, Ohio, Missouri, Columbia-Snake, and Illinois river systems — and 926 harbors (see also Ports & Waterways Safety), operating 236 lock chambers that allow vessels to traverse elevation changes and moving approximately 500 million tons of cargo annually at a fraction of rail or truck costs; the Inland Waterways Trust Fund (funded by a barge fuel tax) covers 50% of construction costs. For flood control, the Corps operates one of the world's largest flood damage reduction systems — approximately 700 dams and reservoirs, 14,000+ miles of levees, and hundreds of miles of floodwalls and channels — preventing an estimated $100+ billion in flood damages annually; flood control projects are cost-shared at 65% federal and 35% non-federal, typically state/local.

Beyond infrastructure, the Corps administers the nation's most consequential wetland and waterway permitting program: Section 404 of the Clean Water Act requires a Corps permit for any discharge of dredged or fill material into "waters of the United States" (including wetlands), while Section 10 of the Rivers and Harbors Act requires a permit for any work in navigable waters — together processing approximately 60,000 permit actions per year. The definition of "waters of the United States" has generated decades of litigation and regulatory shifts, most recently narrowed by Sackett v. EPA (2023). Congress authorizes and modifies Corps projects through the Water Resources Development Act (WRDA), typically reauthorized every two years — projects must complete a multi-year feasibility study, achieve a favorable benefit-cost ratio, and receive a Chief of Engineers recommendation before authorization. The Corps also conducts major environmental restoration efforts, including the Comprehensive Everglades Restoration Plan (~$23 billion authorized), Louisiana coastal restoration, and ecosystem recovery in the Great Lakes and Chesapeake Bay.

How It Affects You

If you live in a floodplain or behind levees: Corps flood infrastructure prevents an estimated $100+ billion in flood damages annually, but it doesn't eliminate risk — levees reduce flood probability, they don't eliminate it. A key fact: FEMA flood maps often show a lower flood risk for areas behind accredited Corps levees than areas without them, which affects whether you're required to carry flood insurance under the National Flood Insurance Program. To find out if your community's levees are accredited (meeting Corps standards), check FEMA's Levee Breach tool at msc.fema.gov or contact your local floodplain manager. If your community's levee loses accreditation — which happens when deferred maintenance accumulates — FEMA remaps the area at higher flood risk, and flood insurance rates can jump dramatically for residents. Levee accreditation status is driven by the local non-federal sponsor's commitment to inspection and maintenance, not just the Corps — so local government decisions directly affect your flood insurance costs.

If you own waterfront property or plan to build near water: If your project involves any discharge of dredged or fill material into "waters of the United States" — including wetlands — or any work in navigable waters, you likely need a Corps permit under Section 404 of the Clean Water Act and/or Section 10 of the Rivers and Harbors Act. The Supreme Court's Sackett v. EPA (2023) significantly narrowed federal jurisdiction over wetlands, limiting Section 404 coverage to wetlands with a continuous surface connection to navigable waters — but Corps jurisdictional determinations are still fact-intensive and property-specific. Start with a jurisdictional determination (JD) request from your local Corps district: this formally tells you whether your land is subject to Corps jurisdiction. Many routine projects qualify for Nationwide Permits (NWPs) — general permits that authorize specific low-impact activities without an individual permit — which are faster and cheaper than the individual permit process. Unauthorized fill or work can result in stop-work orders, substantial fines, and mandatory restoration at your expense.

If you ship goods on inland waterways: The 12,000-mile inland waterway system is the most cost-efficient freight transportation mode in America — roughly $0.02-0.03 per ton-mile compared to $0.04-0.06 for rail and $0.30+ for truck. The Mississippi, Ohio, and other river systems move coal, grain, petroleum, chemicals, and other bulk commodities at scale. Channel reliability depends on Corps dredging budgets and river conditions — periods of low water levels (especially during droughts) reduce channel depths and restrict vessel loads. Check the Corps Navigation Data Center (ndc.ops.usace.army.mil) for current channel conditions and restrictions on specific waterways. The Inland Waterways Trust Fund (funded by a 29-cents/gallon diesel fuel tax on commercial vessels) covers 50% of construction costs for inland navigation projects; the other 50% comes from general funds — funding gaps have created a maintenance backlog of several billion dollars on the inland waterway system.

If you work in development, environmental consulting, or community planning: The Corps permitting program processes ~60,000 decisions per year, making it the nation's most significant wetland and waterway regulatory program. Corps district offices are the primary point of contact — each district handles a specific geographic area. Pre-application meetings are strongly encouraged and can save significant time and cost by identifying Corps concerns before you've committed to a design. Environmental mitigation banking (purchasing credits from an approved mitigation bank) has become the preferred way to compensate for unavoidable wetland impacts — check the Corps Regulatory In-lieu Fee and Bank Information Tracking System (RIBITS at usace.army.mil/ribits) for banks near your project. Section 408 of the Rivers and Harbors Act requires Corps approval before anyone alters or adds to Corps civil works projects (including levees) — a requirement that affects local governments planning flood protection upgrades adjacent to federal infrastructure.

State Variations

• Corps projects require non-federal sponsors (usually state/local entities) that share costs and provide lands and easements
• State wetland laws may impose additional permitting requirements beyond federal Section 404 permits
• Some states maintain their own levee systems separate from the federal system
• State water law governs water allocation; the Corps must operate projects consistent with applicable state law
• Coastal states may have additional shore protection and coastal zone management requirements

Implementing Regulations

• 33 CFR Part 329 — Definition of Navigable Waters of the United States: the Army Corps of Engineers' regulatory definition of "navigable waters" — the foundational threshold for the Corps' jurisdiction under the Rivers and Harbors Act (33 U.S.C. § 401) and one key component of "waters of the United States" under the Clean Water Act Section 404 permit program. This definition matters because it determines whether a body of water is subject to Corps permitting authority:

  • § 329.4 — General definition: navigable waters are those waters that are subject to the ebb and flow of the tide and/or are presently used, or have been used in the past, or may be susceptible to use to transport interstate or foreign commerce; the "susceptible to use" language extends jurisdiction to waters that could be commercially navigated if obstructions were removed — not just waters currently in active use
  • § 329.10 — Existence of obstructions: a stream may be navigable despite natural or artificial obstructions (falls, rapids, sandbars, bridges, portages, shifting currents); the question is whether the waterway in its natural state — without the obstruction — is capable of bearing commerce; a historical record of commercial use (logging drives, steamboat travel, fur trade routes) generally establishes navigability regardless of current condition
  • § 329.11 — Rivers and lakes: Corps jurisdiction over a river extends to the ordinary high water mark (OHWM) on each bank; for lakes, jurisdiction extends to OHWM; the OHWM is identified by physical evidence such as clear natural lines impressed on the bank by water at its ordinary height, erosion, shelving, changes in soil character, lack of terrestrial vegetation, and presence of litter and debris
  • § 329.12 — Oceanic and tidal waters: Corps jurisdiction over ocean and coastal waters extends seaward to the outer limit of U.S. territorial jurisdiction; for tidal rivers and estuaries, jurisdiction extends to the mean high water mark

  The Part 329 definition is distinct from the "waters of the United States" (WOTUS) definition in EPA's Clean Water Act regulations (40 CFR Parts 120, 130) — WOTUS is broader, including tributaries, wetlands adjacent to navigable waters, and other water bodies; Part 329's navigable waters definition is narrower and is the basis for Rivers and Harbors Act Section 10 permits rather than all Section 404 permits. Post-Sackett v. EPA (2023), the Supreme Court significantly narrowed WOTUS, but Part 329's navigable waters definition for Rivers and Harbors Act jurisdiction remains unchanged by that decision.

• 33 CFR Part 207 — Navigation regulations for inland waterways (operational rules for Army Corps locks, dams, and navigable channels)

• 33 CFR Part 209 — Administrative procedure for Army Corps civil works programs

• 33 CFR Part 222 — Engineering and design for Army Corps flood control projects

• 33 CFR Part 208 — Flood control regulations (rules governing Army Corps flood control reservoirs and levees)

• 33 CFR Part 162 — Inland waterways navigation regulations (§§ 162.40, 162.115 — specific waterway regulations including Chesapeake-Delaware Canal, Keweenaw Waterway)

• 33 CFR Part 320–332 — Army Corps regulatory program (§ 404 permit regulations for dredge/fill activities in waters of the United States)

• 40 CFR Part 231 — Section 404(c) Procedures: EPA's authority to veto or restrict Army Corps dredge-and-fill permits — one of the most powerful (and rarely used) environmental veto authorities in federal law. Key provisions:

  • § 231.1 — Applicability: these procedures govern how EPA exercises its authority under CWA § 404(c) to prohibit, restrict, or withdraw the specification of any area as a disposal site for dredged or fill material; EPA may act on pending permit applications or on sites already specified in existing permits
  • § 231.2 — Initiation: the EPA Regional Administrator may propose a § 404(c) determination on the Regional Administrator's own initiative or in response to a request from any person; initiation requires a determination that the discharge will have an "unacceptable adverse effect" on municipal water supplies, shellfish beds, fishery areas, wildlife, or recreational areas
  • § 231.3 — Proposed determination: the Regional Administrator issues a written proposed determination explaining the factual and legal basis for the proposed action; notice is published in the Federal Register and provided to the applicant, the Army Corps, and the state; the Army Corps must suspend permit processing upon receipt of a proposed determination
  • § 231.4 — Public comment and hearing: a 30-to-60-day public comment period follows the proposed determination; the Regional Administrator must hold a public hearing if requested; the hearing record becomes part of the administrative record for final determination
  • § 231.5 — Recommended determination: within 30 days of the close of the public hearing (or comment period if no hearing), the Regional Administrator issues a recommended determination to the EPA Administrator with supporting documentation
  • § 231.6 — Final determination: the EPA Administrator issues the final § 404(c) determination within 30 days of the recommended determination, after consulting with the Army Corps Chief of Engineers; the determination may prohibit, restrict, or deny the specification — or withdraw an earlier specification already in effect
  • § 231.7 — Emergency procedures: if a specification already in effect creates an imminent and substantial endangerment to municipal water supplies, shellfish beds, or fishery areas, the Regional Administrator may request the Administrator take emergency action without waiting for the full public process; emergency determinations are subject to post-hoc notice and comment

  Section 404(c) has been invoked only 14 times in the Clean Water Act's history (since 1972), making each use a significant policy event. The most prominent recent invocation was EPA's final § 404(c) determination on the Pebble Mine project in Alaska (Bristol Bay watershed) — issued January 30, 2023 — which would have been one of the largest open-pit copper and gold mines in North America adjacent to the world's largest sockeye salmon fishery. EPA's determination effectively foreclosed the project, citing destruction of approximately 100 miles of streams and 2,100 acres of wetlands; ongoing litigation from Pebble Limited Partnership and the State of Alaska is challenging the determination. The rarity of § 404(c) vetoes reflects its political cost rather than legal limitation: the authority is broad, the standard ("unacceptable adverse effect") is not highly demanding, and EPA can initiate without waiting for the Corps to act — but exercising it directly confronts project proponents, states, and often Congress.

  Recent rulemakings: no significant amendments to 40 CFR Part 231 in the last decade; the Part's procedures date to the 1979 final rule and have remained stable through multiple administrations. Litigation over the Pebble Mine determination is ongoing as of 2026 — Pebble returned to court in late 2025 challenging the EPA veto.

• 33 CFR Part 333 — Processing of Department of the Army Permits and Section 408 Permissions: NEPA Implementing Procedures (34 sections — the Corps' procedural framework integrating NEPA environmental review into permit and Section 408 permission decisions; establishes when NEPA applies, how environmental documents are prepared, and how NEPA analysis feeds into the Corps' decision-making):

  • § 333.11 — Determining when NEPA applies: NEPA does not apply to purely ministerial actions (e.g., clerical permit issuance with no discretion) or to nationwide permits (which have their own programmatic NEPA; individual projects covered by NWPs generally don't require project-specific NEPA); for individual Section 404 or Section 10 permits and Section 408 permissions, the District Engineer determines NEPA applicability case-by-case based on whether there is federal action with potential environmental significance
  • § 333.12 — Appropriate level of NEPA review: three tiers — (1) categorical exclusion (CE): for routine or clearly minor actions unlikely to have significant environmental effects; (2) Environmental Assessment (EA) with Finding of No Significant Impact (FONSI): for actions where significance is uncertain; (3) Environmental Impact Statement (EIS): for actions expected to have significant environmental effects; Corps permit decisions on major infrastructure projects (port expansions, bridge replacements, large dredging projects) frequently require EIS-level review, while most routine fill permits qualify for CEs
  • § 333.14 — Categorical exclusions: the Corps has a list of activities categorically excluded from further NEPA analysis — including maintenance dredging of established navigation channels, minor discharge of fill material for bank stabilization, and certain small-scale residential and commercial projects; CEs significantly speed permit processing but require individual case-by-case determination that no extraordinary circumstances exist
  • § 333.15 — Environmental assessments: an EA documents the potential environmental effects of a proposed action and alternatives; after public review, the District Engineer either issues a FONSI (ending NEPA review and proceeding to permit decision) or determines an EIS is required; EAs are typically 5–50 pages; FONSIs may include mitigation measures that become permit conditions
  • § 333.18 — Notices of intent and scoping: when an EIS is required, the Corps publishes a Notice of Intent (NOI) in the Federal Register announcing the start of the EIS and inviting public and agency participation in scoping; scoping identifies significant issues and alternatives for analysis; it also identifies cooperating agencies (often EPA, FWS, and NMFS) whose expertise informs the EIS
  • § 333.20 — Significance determination: factors the Corps evaluates include: context (local vs. national significance), intensity (severity, degree of controversy, precedent-setting nature), whether the action involves listed species or critical habitat, floodplains, wetlands, prime farmland, or areas of cultural significance; highly controversial projects — whether controversial because of environmental impact or public opposition — tend to require EIS-level review
  • § 333.21–333.24 — EIS preparation: Corps EIS documents must include alternatives analysis (Corps must consider a "no action" alternative and practicable alternatives that achieve the project purpose); analysis of direct, indirect, and cumulative impacts; mitigation hierarchy; page limits apply (150 pages for normal EIS, 300 pages for exceptionally complex); the EIS process includes a draft EIS (public comment period minimum 45 days), response to comments, and final EIS; the Corps makes its Record of Decision at least 30 days after the final EIS is available

  Section 408 permissions (authorized under 33 U.S.C. § 408) are a parallel and increasingly important Corps authority separate from permitting — they authorize private parties, local governments, and other federal agencies to modify, alter, or add to Corps Civil Works projects (primarily levees, floodwalls, and navigation infrastructure). Without a 408 permission, local governments cannot install drainage pipes through Corps levees, utilities cannot cross Corps channels with pipelines, and developers cannot build roads over Corps flood control structures. Section 408 review applies NEPA under Part 333 and is not subject to the same timelines as traditional permit processing. The combination of Section 404 permit and Section 408 permission is required for many major waterfront development and flood infrastructure projects.

  Recent rulemakings: no major Federal Register amendments to Part 333 in the last 5 years; the Part's NEPA procedures were updated following NEPA regulatory changes in 2020 (CEQ's Phase 1 and Phase 2 revisions) and aligned with the Fiscal Responsibility Act's NEPA permitting streamlining provisions enacted in 2023.

• 33 CFR Part 325 — Processing of Department of the Army Permits: the procedural regulation governing the lifecycle of an individual Section 404 (dredge and fill), Section 10 (navigable waters), or Section 103 (ocean dumping) permit application from receipt through decision:

  • § 325.1 — Application requirements: an application for a Department of Army permit must include a complete description of the proposed activity, drawings showing the project location and work area, information on the purpose and need for the project, and identification of the applicant's ownership or control over the affected property; incomplete applications are returned to the applicant with a deficiency notice; the application process begins the formal regulatory clock
  • § 325.2 — Standard processing: upon receiving a complete application, the district engineer assigns an identification number and initiates a public interest review; the district engineer evaluates the proposed activity against a broad "public interest" standard that weighs benefits against potential harms and considers national, local, and regional concerns; the Corps coordinates with other federal and state agencies (EPA, USFWS, NMFS, state historic preservation offices) during the review
  • § 325.3 — Public notice: the primary tool for informing the public and soliciting comments; the district engineer publishes a public notice (typically mailed to adjacent landowners, local governments, conservation groups, and posted online) describing the proposed work, the Corps' preliminary assessment, and allowing at least 15 days for comment (often extended to 30 days); EPA, other federal agencies, and state governments may comment; if the Corps receives substantive objections, the comment period may be extended
  • § 325.4 — Permit conditioning: if the Corps determines a project is in the public interest but requires modifications to minimize impacts, the district engineer adds special conditions — specific limits on construction methods, seasonal restrictions (avoiding fish spawning periods), mitigation requirements, monitoring obligations, or site restoration upon project completion; conditions are binding and violations may trigger enforcement; compensatory mitigation (wetland creation or restoration elsewhere) is commonly required as a permit condition
  • § 325.5 — Individual vs. general permits: the Corps issues permits as either (1) individual permits (project-specific review for activities that don't qualify for general permits) or (2) general permits (nationwide or regional authorizations for categories of activities with minimal individual impact — see Nationwide Permits under 33 CFR Part 330); individual permits require the full public notice and review process; most routine activities (minor utility crossings, small fills) use Nationwide Permits that authorize work with simple notification or no notification
  • § 325.7 — Modification, suspension, and revocation: the district engineer may modify a permit if circumstances change, suspend a permit if continuing work would cause injury to the public interest, or revoke a permit if the permittee fails to comply with conditions; revocation triggers all enforcement and restoration obligations under the Corps' regulations and Clean Water Act Section 404 enforcement authorities
  • § 325.8 — Decision authority: authority to issue or deny permits is delegated to district engineers (with certain categories reserved for higher authority, including projects of extraordinary national interest or involving international waterways); a denied permit may be appealed to the Division Engineer and ultimately reviewed by federal courts under the APA

  The Part 325 permit process is the gateway for virtually all development activity in waters of the United States — wetlands, streams, rivers, coastal areas, and navigable waterways. The public interest review standard is deliberately broad: the district engineer must balance economic benefits, navigation, recreation, water supply, conservation, aesthetics, fish and wildlife values, flood hazards, and public safety. After Sackett v. EPA (2023), the "waters of the United States" subject to Section 404 jurisdiction is narrower — affecting which projects require individual permits vs. qualifying for Nationwide Permits or no permit at all. Corps district offices maintain project databases and permit tracking systems accessible through the Regulatory Program website. Recent rulemakings: 90 FR 29472 (2025) — updated district engineer procedures for permit processing and public notice requirements.

• 33 CFR Part 332 — Compensatory Mitigation for Losses of Aquatic Resources: the Corps/EPA joint regulation establishing the framework for how project proponents must offset unavoidable impacts to wetlands and other waters of the United States when they receive Section 404 permits. Compensatory mitigation is the third step in the mitigation hierarchy (avoid → minimize → compensate) — if impacts cannot be fully avoided or minimized, the permit holder must compensate through restoration, establishment, enhancement, or preservation of aquatic resources. Key provisions:

  • § 332.1 — Purpose: the fundamental objective is to offset environmental losses from unavoidable impacts authorized by DA permits; the rule establishes standards for three forms of compensatory mitigation — permittee-responsible mitigation, mitigation bank credits, and in-lieu fee (ILF) program contributions; the preferred hierarchy runs: mitigation bank credits first (most reliable), then ILF programs, then permittee-responsible mitigation (least preferred due to compliance risk)
  • § 332.2 — Definitions: "adaptive management" (management strategy anticipating challenges and providing for corrective action); "mitigation bank" (a site where wetlands are restored, established, enhanced, or preserved in advance of permit issuance and credits sold to permit holders); "in-lieu fee program" (program where permit holders pay a fee to a third party that pools funds for watershed-scale mitigation projects); "permittee-responsible mitigation" (mitigation performed by the permit holder directly, either on-site or off-site)
  • § 332.3 — General requirements: mitigation must be ecologically appropriate to the type of aquatic resource impacted (replacing a tidal marsh with a freshwater wetland generally doesn't satisfy the requirement); mitigation sites must be located within the same watershed as the impact where practicable; mitigation must be implemented before or concurrent with impacts whenever possible; the standard is "no net loss" of wetland acres and function
  • § 332.5 — Performance standards: approved mitigation plans must specify measurable ecological performance standards (e.g., specified percent cover of planted native vegetation, water table elevation indicators, macroinvertebrate diversity indices) against which the mitigation site will be assessed; if performance standards aren't met, the permit holder must take corrective action
  • § 332.6 — Monitoring: the permittee or bank sponsor must submit annual monitoring reports to the Corps district for a specified period (typically 5 years minimum); the Corps reviews the reports to confirm performance standards are being met; if they aren't, the Corps may require remediation or demand that additional mitigation credits be purchased
  • § 332.7 — Site protection: mitigation sites must be protected from future development through conservation easements, deed restrictions, or transfer to a governmental or non-governmental entity with a conservation mission; perpetual protection is required — the Corps will not accept mitigation sites that could be developed in future decades
  • § 332.8 — Mitigation banks and ILF programs: banks and ILF programs must have an approved instrument (legal agreement between the bank/ILF sponsor and the district engineer) before any credits can be sold; the instrument must specify the service area (geographic region from which credits may be sold), credit schedule, performance standards, monitoring plan, and financial assurances (mechanisms ensuring the bank can fund remediation if it fails, such as letters of credit or performance bonds)

  Compensatory mitigation has become a $3.5 billion market — mitigation banks and in-lieu fee programs generate billions of dollars in credit sales annually, enabling a functioning market for wetland offsets. The Corps maintains the Regulatory In-lieu fee and Bank Information Tracking System (RIBITS) at usace.army.mil — a public database of all approved mitigation banks and ILF programs showing available credits by watershed. Developers, homebuilders, pipeline companies, and infrastructure project managers routinely use RIBITS to find available credits before applying for permits; the price of mitigation bank credits varies widely by region and ecosystem type, from a few thousand dollars per credit in the Southeast to $100,000+ per credit in California's Central Valley. Recent rulemakings: 73 FR 19594 (April 2008) — the 2008 Final Mitigation Rule that established the current Part 332 framework (joint Corps/EPA rule); the credit hierarchy preferring banks over ILF programs over permittee-responsible mitigation was established in this rule.

• 36 CFR Part 327 — Rules and Regulations Governing Public Use of Water Resource Development Projects (29 sections): the Army Corps of Engineers' operational rules governing public recreation at the approximately 400 Corps-managed reservoir and flood control projects that collectively host over 360 million visits annually — making the Corps the nation's largest provider of outdoor recreation by visitor-day count, ahead of the National Park Service. Part 327 implements 16 U.S.C. § 460d, which authorizes the Corps to manage lands adjacent to its water resource projects for public recreation. The regulation governs day-to-day conduct at Corps project areas, from campgrounds and boat ramps to swimming beaches and picnic areas. Key provisions:

  • § 327.1 — Policy: the Corps manages natural, cultural, and developed resources at project lands and waters to provide quality outdoor recreation and to protect and enhance those resources; the dual mandate — recreation access plus resource protection — is the organizing tension in all Part 327 enforcement decisions
  • § 327.2 — Vehicles: all vehicles must be operated on designated roads and parking areas only; off-road vehicle (ORV) use is restricted to designated ORV areas; speed limits on project roads are set by posted signs; vehicles operating on ice must comply with weight restrictions posted by the District Commander; vehicles must carry proof of registration
  • § 327.3 — Vessels: all vessels must be operated in a safe and reasonable manner; vessel operators must observe all posted speed limits, no-wake zones, and navigation markers; vessels may not anchor in navigation channels; houseboats and other floating structures may not be moored in project waters without a permit; personal watercraft (jet skis) are prohibited from areas with posted swimming beaches
  • § 327.4 — Swimming and diving: swimming is permitted only in designated swimming areas; no swimming or wading within 50 feet of any dam, spillway, or other water control structure; diving in unauthorized areas is prohibited; the restriction near control structures reflects the severe hazard from submerged hydraulics and changing water levels at dam tailwaters
  • § 327.8 — Sanitation: no discharge of untreated sewage from vessel holding tanks within 500 feet of any shoreline or designated swimming area; solid waste disposal must be in designated receptacles; no dumping of household garbage from off-site at project facilities; no cleaning of fish or game except in designated cleaning stations
  • § 327.10 — Fires: open fires permitted only in designated fire rings, fireplaces, grills, and similar facilities; no burning of household garbage; fires must be completely extinguished before leaving the area; the District Commander may restrict or prohibit fires during drought or high fire danger conditions by posted notice
  • § 327.11 — Animals: dogs, cats, and other pets in developed recreation areas must be on a leash no more than 6 feet long or otherwise confined; pets are generally prohibited in designated swimming areas; no horses or other livestock in developed recreation areas or on trails without written permission; feral and threatening animals may be controlled by the District Commander
  • § 327.12 — Restrictions: the District Commander may establish visiting hours, close areas for safety or resource protection, and restrict use of specific project areas by posted notice; no person may remain at a Corps project campground for more than 14 consecutive days in any 30-day period (the standard Corps camping length-of-stay rule designed to prevent long-term residence at fee campgrounds)
  • § 327.13 — Firearms and weapons: loaded firearms, ammunition, and projectile-firing devices are prohibited in or within 50 feet of any designated swimming area, boat ramp, or picnic area; sport shooting is permitted only in designated areas; the firearms restriction for recreation areas applies regardless of state concealed carry laws, as Corps project lands are federal lands where the Corps may impose additional restrictions
  • § 327.17 — Advertisement and distribution: distributing printed matter or conducting commercial activity on project lands without a permit is prohibited; political campaigning and solicitation (including organized religious activities) require written permission from the District Commander; this provision has been the subject of First Amendment litigation — courts have generally upheld Corps permit requirements for expressive activity as long as the permit process is content-neutral and permits cannot be denied based on viewpoint
  • § 327.18 — Commercial activities: engaging in any business on Corps project lands without express written permission is prohibited; this covers everything from food vendors to guide services to photography companies; commercial fishing for sale requires a separate permit; authorized concessionaires operate under lease agreements with the Corps and are not covered by § 327.18's prohibition
  • § 327.19 — Permits: refusal or failure to comply with a Corps recreation permit's terms and conditions is a violation of Part 327; permits for non-standard uses (commercial activity, organized events, use of areas outside normal visitor hours) are issued by the District Commander; standard camping and day-use permits (where fees are charged) are administrative in nature and do not require separate application — they are obtained by paying the applicable fee
  • § 327.20 — Unauthorized structures: no person may construct, place, or maintain any structure on Corps project lands without authorization; unauthorized docks, storage sheds, fences, trails, and signs must be removed on Corps demand; structures left on Corps land become federal property if not removed; the unauthorized structure prohibition is a common enforcement issue at reservoirs where adjacent landowners have historically built private docks on Corps-owned shoreline
  • § 327.25 — Violations and penalties: violations of Part 327 regulations are misdemeanors under 36 CFR Part 1 and may be prosecuted in federal district court; penalties include fines and imprisonment; the Corps can also issue exclusion orders barring persistent violators from all Corps project lands; Corps rangers (civilians with law enforcement authority under 16 U.S.C. § 460d) enforce Part 327

  The Army Corps operates the largest system of freshwater reservoirs in the United States — ranging from 500-acre local flood control impoundments to Lake Cumberland (Kentucky, 63,000 acres) and Millwood Lake (Arkansas, 29,500 acres). Many Corps reservoirs are the primary recreational water access point for surrounding counties, and Corps campgrounds and day-use areas provide affordable outdoor recreation in areas without national park or national forest access. The 14-consecutive-day camping limit is the Corps' main tool against long-term residency; enforcement challenges arise when campers move between nearby Corps projects to reset the limit. Fee collection is handled through the Recreation.gov federal reservation system for advance reservations and the National Recreation Reservation Service (NRRS) for walk-up fees. No major amendments to Part 327 since 2003 (68 FR 44027 — clarifying the camping length-of-stay rule and updating vessel provisions).

Pending Legislation

• HR 7519 — Army Corps Congressional Engagement Act: would require the Army Corps of Engineers to provide annual briefings to Congress on project status, backlogs, and priorities. Status: Introduced.
• HR 7264 — Restoring America's Floodplains Act: would promote natural floodplain restoration as a flood risk management strategy, complementing structural flood control. Status: Introduced.
• S 3317 — Water Resources Technical Assistance Review Act: would direct GAO to review EPA clean water programs and technical assistance to states and localities. Status: Introduced.
• S 3140 — Flood Protection and Infrastructure Resilience Act: would authorize new investments in flood protection infrastructure and climate resilience for communities facing increased flood risk. Status: Introduced.

Recent Developments

• The Bipartisan Infrastructure Law (2021) provided ~$17 billion for Corps Civil Works, the largest single investment in the program's history
• Recent WRDA bills have streamlined the project authorization process and expanded environmental restoration authorities
• Climate change is increasing flood frequency and severity, straining existing infrastructure and driving demand for new projects
• The Supreme Court's Sackett v. EPA (2023) decision narrowed the definition of "waters of the United States," reducing the scope of Corps Section 404 jurisdiction
• Aging infrastructure — many Corps dams and locks are 50-100+ years old, creating significant rehabilitation backlogs
• Sackett aftermath and 2025 regulatory rulemaking: following Sackett v. EPA (2023), the Corps and EPA issued a revised "waters of the United States" rule in 2023 that narrowed Section 404 jurisdiction; the Trump administration in 2025 proposed further rolling back the definition, which would exempt more wetlands and ephemeral streams from permitting requirements.
• DOGE Army Corps workforce impacts: the Corps of Engineers faced early retirement offers and hiring freezes in early 2025; with over 37,000 employees managing $80B+ in active construction, staffing reductions raised concerns about project oversight and dam safety inspection timelines.
• OBBBA accelerated permitting provisions: the reconciliation bill includes provisions fast-tracking Corps Section 404 permits for energy and infrastructure projects, potentially reducing the standard 60-day individual permit review to 30 days and limiting compensatory mitigation requirements.