Federal Reclamation & Western Water Projects

The Bureau of Reclamation — established by the Reclamation Act of 1902 (43 U.S.C. §§ 371–600e) — is the nation's largest water supplier and the second-largest producer of hydroelectric power, operating approximately 491 dams, 53 power plants, and millions of acres of irrigated farmland across 17 western states, delivering water to 31 million people and irrigating approximately 10 million acres of agricultural land that produces roughly 60% of the nation's vegetables and 25% of its fruits and nuts. Federal water projects — built throughout the 20th century with federal construction subsidies — underpin the entire agricultural economy of the arid West, where precipitation is insufficient for dryland farming. The Central Valley Project (California), Colorado-Big Thompson Project (Colorado), and the Colorado River storage system (Lake Mead/Hoover Dam, Lake Powell/Glen Canyon Dam) are the signature Reclamation infrastructure. These projects are now at the center of the most consequential water crisis in American history: the Colorado River Basin's 23-year megadrought has dropped Lake Mead and Lake Powell to historically low levels, forcing Reclamation to implement first-ever water delivery cuts to Arizona, Nevada, and California under the Law of the River (a complex web of interstate compacts, court decrees, and federal law). The IIJA (2021) provided $8.3 billion for western water infrastructure, drought resilience, and water recycling programs — the largest federal water investment since the dam-building era.

Current Law (2026)

Legal Authority

• 43 U.S.C. § 371 et seq. — Reclamation Act of 1902 (authorizes the Secretary of Interior to construct irrigation works in the arid Western states; created the Reclamation Fund from public land sales and mineral receipts)
• 43 U.S.C. § 390aa-uu — Reclamation Reform Act of 1982 (acreage limitation: 960 acres per individual; full-cost pricing for water delivered to excess landholdings; certification of compliance; trusts and entities)
• 43 U.S.C. § 485-485k — Reclamation Project Act of 1939 (repayment contracts; interest-free capital costs; operation and maintenance charges; water right settlements)
• 43 U.S.C. § 617-617t — Boulder Canyon Project Act (authorized Hoover Dam and the All-American Canal; Colorado River water allocation among seven basin states; hydropower generation and marketing)
• 43 U.S.C. § 1524-1556 — Colorado River Basin Project Act (authorized the Central Arizona Project; water allocation; environmental and recreational provisions)
• 43 U.S.C. § 2401-2409 — Rural Water Supply Act of 2006 (authorized Bureau of Reclamation rural water supply program; appraisal investigations; feasibility studies; federal cost share)

How It Works

Federal reclamation law is the foundation of water policy in the American West. Without the dams, reservoirs, canals, and aqueducts built by the Bureau of Reclamation over the past century, much of the Western United States — including major agricultural regions and cities like Los Angeles, Phoenix, Las Vegas, and Denver — would not have the water supply to sustain their current populations and economies.

The Reclamation Act of 1902 authorized the federal government to build irrigation infrastructure in the arid West to "reclaim" desert lands for farming. The original concept was that farmers would repay construction costs over time through a revolving Reclamation Fund. In practice, most projects have required significant federal subsidies — farmers repay only a fraction of actual construction costs, interest-free, over periods up to 40 years. The Bureau of Reclamation has built some of the most iconic infrastructure in American history: Hoover Dam, Grand Coulee Dam, Glen Canyon Dam, and hundreds of others. Reclamation delivers water through long-term contracts with irrigation districts, municipalities, and other water users specifying delivery amounts, repayment terms, and operating conditions. The Reclamation Reform Act of 1982 addressed the most controversial subsidy by limiting subsidized water to 960 acres per individual landowner; landowners with more than 960 acres must pay "full cost" (including interest) for water on excess acreage. Many Reclamation dams also generate hydroelectric power, marketed by the Western Area Power Administration and Bonneville Power Administration at cost-based rates — a critical source of low-cost clean electricity in the West, though climate change and drought have reduced generation capacity at many facilities.

The Colorado River system — the most important water source in the Southwest — is managed under a complex web of federal and state law known as the "Law of the River," but the river is over-allocated: the seven basin states and Mexico collectively hold rights to more water than the river produces in most years. Severe drought and climate change have reduced Lake Mead and Lake Powell to historically low levels, threatening water supplies for 40 million people and triggering unprecedented shortage declarations and mandatory cutbacks that have forced renegotiation of basin water-sharing agreements. The Rural Water Supply Act of 2006 authorized the Bureau of Reclamation to help rural communities in the 17 reclamation states develop drinking water supply infrastructure through appraisal investigations, feasibility studies, and construction assistance — expanding Reclamation's mission beyond irrigation and hydropower to municipal water security in rural areas of the West.

How It Affects You

If you live in Arizona, Nevada, California, or another Colorado River basin state: The Colorado River crisis is the most significant water policy event in the American West in a century. Lake Mead's elevation — the benchmark for shortage declarations — determines mandatory water delivery cuts. Under the 2007 Interim Guidelines: Tier 1 shortage (elevation below 1,075 feet) requires Arizona to cut 512,000 acre-feet/year (about 18% of its Colorado River allocation), Nevada to cut 21,000 acre-feet. Tier 2 and Tier 3 cut deeper as elevation drops further. The Inflation Reduction Act (2022) provided $4 billion for Colorado River conservation — primarily to pay water users to voluntarily leave water in the reservoir. The post-2026 Colorado River operating guidelines are currently being negotiated — the framework that determines your state's future allocation will be set by a new interstate agreement between Arizona, California, Colorado, Nevada, New Mexico, Utah, and Wyoming. The outcome will shape western water supply for decades. Track the negotiations and your state's negotiating position: these agreements are typically reached through interstate compact processes overseen by the Department of Interior.

If you're a farmer with a Bureau of Reclamation water contract: Your water contract's priority date determines your exposure to shortage cuts — older (senior) water rights survive shortages better than newer (junior) rights. The 960-acre acreage limitation means that if your individual landholding receiving subsidized reclamation water exceeds 960 acres, you pay "full cost" (including interest) on the excess — a meaningfully higher rate than the subsidized price. Your irrigation district handles the actual Reclamation relationship (most individual farmers contract with their irrigation district, not directly with Reclamation), so your district's contract priority date and conservation obligations affect your actual supply. The IIJA (2021) allocated $8.3 billion for Reclamation infrastructure — including dam safety, water recycling, and water use efficiency programs your district may be able to access through cost-share agreements. Contact your regional Reclamation office (usbr.gov) or your irrigation district's general manager to understand your contract terms and shortage exposure.

If you're a water or power utility, municipality, or reclamation water contractor: Bureau of Reclamation water contracts are long-term (typically 40+ years), contain drought/shortage provisions, and are not easily renegotiated. Municipal contractors (cities that receive Reclamation water) have generally maintained stable deliveries better than agricultural contractors — cities' political weight and essential-service nature give them priority in shortage sequencing in many contracts. Reclamation's hydropower output — roughly 40 billion kWh/year from 53 plants — supplies low-cost power to western utilities at rates far below market; extended drought has reduced generation at Lake Mead, Lake Powell, and other facilities. If you're a power utility that markets Reclamation hydropower, model drought scenarios: the Western Area Power Administration and Bonneville Power Administration allocate hydro under contract, but output depends on reservoir levels that climate-driven drought has made increasingly unreliable.

If you follow water policy, environmental law, or western land use: Federal reclamation law is an extraordinary anachronism — the 1902 Act was built on the premise of unlimited western growth through water engineering, and most of the foundational infrastructure was built before the environmental era. The Law of the River governing the Colorado is so complex — combining the Colorado River Compact (1922), Boulder Canyon Project Act (1928), Upper Colorado River Basin Compact (1948), seven states' water codes, Mexico water treaty, and dozens of federal court decrees — that even specialized water lawyers don't know all of it. The most consequential near-term policy question: what happens when the 2007 Interim Guidelines expire in 2026? A new framework must reduce total allocations (the river is over-allocated by roughly 1-2 million acre-feet per average year) while navigating interstate political conflict. Arizona and California have historically been in the most conflict over Colorado River shares; tribal water rights settlements (covering significant new water claims from the Navajo Nation, Gila River Indian Community, and others) add new complexity to an already strained system.

State Variations

• Reclamation law applies only in the 17 Western "reclamation states" — it does not apply to Eastern states
• State water law determines the underlying water rights that Reclamation projects serve (prior appropriation in most Western states vs. riparian rights in the East)
• Colorado River allocations are governed by interstate compacts, federal legislation, and Supreme Court decrees specific to the seven basin states
• Each Reclamation project has its own authorizing legislation, contracts, and operating rules

Implementing Regulations

• 43 CFR Part 404 — Reclamation Rural Water Supply Program (construction assistance, prioritization criteria)

• 43 CFR Part 414 — Offstream Storage of Colorado River Water and Interstate Release Agreements: the Reclamation regulatory framework implementing the Arizona v. California Supreme Court decree's water-banking mechanism for the Lower Division States (Arizona, California, and Nevada). Two or more state-authorized entities may enter Storage and Interstate Release Agreements with the Secretary, allowing one state to store its unused Colorado River apportionment offstream (in groundwater banks, surface reservoirs, or conjunctive-use facilities) and later make that "intentionally created unused apportionment" (ICUA) available to an entity in another Lower Division State. Key provisions:

  • § 414.1 — Establishes that transactions may only be voluntary; no interstate water banking agreement can occur without participating entities consenting and meeting state-law authorization requirements for both the storing and consuming state
  • § 414.3 — Each agreement must specify the quantity to be stored, the state and facility of storage, and whether the storage draws from the state's unused basic apportionment (confirmed at 2.8 maf/yr for Arizona, 4.4 maf/yr for California, 0.3 maf/yr for Nevada) or surplus apportionment; water from the storing state's apportionment must first be offered to all in-state entitlement holders before it can be designated for interstate storage
  • § 414.4 — Annual reporting: storing entities must report to the Secretary each year the quantity diverted and stored and the total stored water available to support ICUA development; the Secretary accounts for stored water as consumptive use in the storing state for the year of storage, and as consumptive use in the consuming state in the year of release
  • §§ 414.5–414.6 — The Secretary does not warrant water quality under interstate release agreements; all entities must comply with applicable water pollution laws; the authorized entities must fund in advance all federal costs of evaluating and executing storage agreements, including NEPA and ESA compliance

  This Part operationalizes the "water banking" concept that has become central to Colorado River shortage management — allowing states to build storage reserves in wet years for use during drought-driven shortages. No major amendments since Part 414's promulgation.

• 43 CFR Part 426 — Acreage Limitation Rules and Regulations (26 sections — the implementing regulation for the Reclamation Reform Act of 1982 (RRA), 43 U.S.C. §§ 390aa–390zz, which imposed the 960-acre ownership limit for subsidized reclamation water and requires full-cost pricing for water delivered to excess landholdings; authority: 43 U.S.C. §§ 485, 544):

  • § 426.1 — Purpose: Part 426 implements the RRA's acreage limitation provisions — any individual who owns more than 960 acres of land served by a Bureau of Reclamation project (or 320 acres in some older projects) must pay full-cost water pricing for water delivered to the "excess" acreage above the limit; the full-cost rate includes all capital, operation, maintenance, and interest costs — typically several times the subsidized rate paid for land within the acreage limit
  • § 426.2 — Definitions: "landowner" includes individuals, trusts, and legal entities (corporations, partnerships, LLCs); "qualified recipient" means someone who owns land that does not exceed the acreage limitation and is eligible for subsidized water; "full-cost recipient" means a qualified recipient who receives water deliveries exceeding the limitation and therefore pays full cost for the excess
  • § 426.3 — Westlands Water District: the largest Reclamation irrigation district in the country (600,000 acres in the San Joaquin Valley) is subject to special acreage limitation rules reflecting its unique contract structure; Westlands landowners have faced ongoing compliance issues and contract renegotiations related to the acreage limitation
  • § 426.10 — Public entities: state governments, cities, counties, and other public entities are generally exempt from the individual acreage limitation — the 960-acre cap applies to private landowners receiving water for farming operations, not to municipalities contracting for municipal and industrial (M&I) water supply
  • § 426.11 — Class 1 equivalency: Reclamation must determine the "Class 1 equivalency" — the full productive value of a landholder's acreage holdings — before applying the limitation; different land classifications (prime irrigable, limited irrigable, nonirrigable) are converted to Class 1 equivalents, which affects how much land counts toward the 960-acre cap; this calculation is district-specific and accounts for soil productivity differences
  • § 426.12 — Excess land designation: if a landowner holds more than the applicable limitation, Reclamation designates the "excess" acreage — typically the least productive or most recently acquired land; owners of excess land may receive water for five years after the excess designation, during which they must sell the excess acreage at the appraised value (not above, to prevent speculation on surplus from water delivery); failure to sell within the five-year period results in Reclamation withholding water deliveries to the excess land
  • § 426.13 — Excess land appraisals: Reclamation appraises excess land at its value without project water — the pre-water value — to prevent landowners from capturing the appreciated value that federal water delivery itself created; the "without water" appraisal requirement is one of the most contentious elements of RRA implementation; landowners argue it undervalues their property; Reclamation argues it prevents private capture of a public subsidy
  • § 426.18 — Landholder information requirements: landowners served by Reclamation projects must file annual Landholder Information Forms (RRA-927) certifying their total landholdings, water usage, and compliance with the acreage limitation; the certification requirement creates a paper trail for RRA enforcement; false certifications are subject to civil and criminal penalties under the Federal False Statements Act

  The acreage limitation has been contentious since the 1902 Reclamation Act itself, which originally set a 160-acre limit (one homestead unit). By the 1970s, large farming corporations had accumulated thousands of acres of irrigated land served by federally subsidized water — the political conflict that drove the 1982 RRA expansion to 960 acres and addition of the full-cost pricing requirement. Even with the 960-acre limit, compliance has been inconsistent — Westlands Water District in California has been in recurring disputes with Reclamation over acreage limitation enforcement, and Congress has repeatedly passed farm-specific exemptions and waivers. Recent rulemakings: 61 FR 66800 (December 1996) — the current Part 426 was substantially revised to clarify excess land appraisal procedures and landholder information requirements following litigation over RRA enforcement in the Central Valley Project.

Pending Legislation

• S 4040 (Sen. Hoeven, R-ND) — Dakota Water Resources Act Amendments: would authorize $1.5 billion for North Dakota and tribal water supply projects, including the Garrison Diversion and other long-delayed systems. Status: Introduced.
• S 637 (Sen. Heinrich, D-NM) — Navajo-Gallup Water Supply Project Amendments: would modify the project to address cost increases, construction delays, and expanded service areas for the Navajo Nation and City of Gallup. Status: Introduced.
• S 565 (Sen. Heinrich, D-NM) — Navajo Nation Rio San Jose Water Rights Settlement Act: would settle the Navajo Nation's water rights claims in the Rio San Jose basin, New Mexico. Status: Introduced.
• S 562 (Sen. Heinrich, D-NM) — Rio San Jose and Rio Jemez Water Settlements Act: would settle water rights claims for the Acoma, Laguna, Jemez, and Zia Pueblos in New Mexico. Status: Introduced.
• S 689 (Sen. Padilla, D-CA) — Tule River Tribe Reserved Water Rights Settlement Act: would authorize a $568 million trust fund to settle the Tule River Tribe's water rights in California. Status: Introduced.

Recent Developments

• Historic drought in the Colorado River basin has triggered unprecedented shortage declarations, mandatory water cutbacks, and emergency conservation measures
• The Inflation Reduction Act (2022) provided $4 billion for drought response and water conservation in the Colorado River basin
• The Bipartisan Infrastructure Law (2021) provided $8.3 billion for Bureau of Reclamation water infrastructure, including dam safety, water recycling, and desalination
• Negotiations over post-2026 Colorado River operating guidelines are ongoing — the current framework expires in 2026, and the seven basin states must agree on a new allocation framework
• Aging Reclamation infrastructure faces growing maintenance and safety backlogs