The federal government has a long history of involvement in water resource development and management to facilitate navigation, expand irrigated agriculture, reduce flood losses, and, more recently, restore aquatic ecosystems. Increasing pressures on the quality and quantity of available water supplies—due to growing population and changing public interests—have resulted in heightened water use conflicts throughout the country, particularly in the West. The late 1970s, 1980s, and 1990s, marked the end of expansionist federal policies of the early 20 th century that had led to widespread federal investment in dams, navigation locks, irrigation diversions, and levees and basin-wide planning and development efforts. Federal water resource construction waned during the last decades of the 20 th century in response to fiscal constraints, interest in more local control of water and land resources, and requirements to assess environmental impacts of federal actions and to protect fish and wildlife. Even so, demand continues for traditional water resource development projects, such as locks and dams, levees, and other flood damage reduction works. Water resources debates in the 111 th Congress likely will be dominated by different opinions of the desirability and need for changing the water resource agencies' policies, practices, and accountability, and for authorizing multi-billion dollar investments in ecosystem restoration, agricultural land drainage, navigation, and flood and storm damage reduction measures. A broad water resource issue significant to the water resources agencies and the nation is the changing federal role in water resources planning, development, and management, and changes in institutional structures to address an evolving federal role. Natural disasters such as the 2008 Midwest flooding, Hurricane Katrina, and Hurricane Ike, have raised questions about this role; in particular, these disasters bring attention to the trade-offs in benefits, costs, and risks of the current division of responsibilities among local, state, and federal entities for flood mitigation, preparedness, response, and recovery. The question of the federal role also is raised by the increasing competition over water supplies, not only in the West but also for urban centers in the Southeast (e.g., Atlanta), which has resulted in a growing number of communities seeking financial and other federal assistance related to water supply development (e.g., desalination and water reuse projects, reservoir expansions and changes in project operations). The 111 th Congress is faced with numerous water resource development and management issues: the federal role in the planning, construction, maintenance, inspection, and financing of water resource projects; federal investment in water resources research and data collection; management and operation of existing projects; environmental protection; and climate variability and change. Congress makes water resource decisions within the context of multiple and often conflicting laws and objectives, competing legal decisions, and entrenched institutional mechanisms, including century-old water rights and long-standing contractual obligations (i.e., long-term water delivery and power contracts). Although most water resource legislation typically addresses site-specific needs, certain themes and issues appear in many local and regional water resources conflicts. For example, demand for new project services (e.g., improved navigation, new water supply, improved or new flood facilities), protection of threatened and endangered species, and water quality concerns are common to many conflicts. The 111 th Congress is likely to consider authorizations and appropriations for numerous site-specific water resource development projects; management of existing projects and aging infrastructure; water resource protection and water rights issues; and regional aquatic ecosystem restoration programs (e.g., Great Lakes, San Joaquin River restoration, Everglades, and Chesapeake Bay). Site-specific restoration legislation enacted in the 110 th Congress included programs for coastal Louisiana, the Upper Mississippi River System, and Platte River. However, the more typical site-specific measures, on a smaller scale, are the hundreds of individual water resources projects authorized through occasional Water Resources Development Acts (e.g., WRDA 2000 and WRDA 2007) and stand-alone bills addressing new water supply technologies and augmentation of existing water supplies, rural water supply development, and Indian water rights settlements. Oversight of existing laws and projects (e.g., the Central Valley Project, flood protection in New Orleans and Sacramento) and project operations is also expected, especially where court decisions, agency actions, or other circumstances (such as drought) may affect project operations (e.g., federal projects on the Appalachicola-Chattahoochee-Flint (ACF), Colorado, Columbia, Klamath, Missouri, and San Joaquin rivers and pumps in the California Bay-Delta). It is not clear to what extent the 111 th Congress may consider broad water policy reform such as water supply or flood policy. Congress rarely chooses to pursue broad legislation on federal water resources policies for many reasons, including the challenge of enacting changes that affect such a wide breadth of constituencies. Another practical challenge is the fractured nature of congressional committee jurisdictions over water resources and water quality issues and activities. Consequently, Congress traditionally has pursued incremental changes through occasional Water Resources Development Act (WRDA) legislation for the U.S. Army Corps of Engineers in the Department of Defense (Corps) and project-specific legislation for the Bureau of Reclamation (Reclamation) in the Department of the Interior. In the West, naturally scarce water supplies and increasing urban populations have exacerbated long-standing debates over water allocation—particularly over water for threatened and endangered species and impacts on agricultural water supplies. Drought conditions in California, the Southwest, and the Southeast, continue to challenge federal, state, and local water managers. Nationwide, observed changes in the timing of snowmelt and runoff and the potential for further climate variability due to climate change has increased concerns about the reliability of developed water supplies and the flexibility of existing management mechanisms. Western water legislation during the 111 th Congress is likely to center on project authorization issues, such as authorization for San Joaquin River restoration settlement legislation, Reclamation's Title 16 water reclamation, reuse, and recycling projects, Indian water rights settlements, San Luis drainage, and various water supply and climate change initiatives. Oversight of Reclamation's Central Valley Project (e.g., Operations Criteria and Plan [OCAP], San Francisco Bay-San Joaquin/Sacramento Rivers Delta [Bay-Delta] management issues), Klamath project, and Colorado River operations also may continue. Congressional attention during the 111 th Congress may focus on the federal role in levee construction, maintenance, inspection and their effects on water resources management generally. Hurricane Katrina, Hurricane Ike, and 2008 Midwest flood oversight issues—such as how to better coordinate federal activities and how to respond or rebuild in the wake of severe damages—may be a particular focus, as might the examination of other areas of the country that may also be vulnerable. Also of concern nationwide is the status of threatened and endangered species and the health of the nation's rivers and riparian areas. Federal obligations to protect threatened and endangered species and other environmental quality requirements have resulted in increased attention to river and watershed restoration efforts. As noted earlier, the federal government is involved in several significant restoration initiatives ranging from the Florida Everglades to the California Bay-Delta. At the same time, the demand for traditional or new water supply projects, navigational improvements, flood control projects, and beach and shoreline protection continues. In fact, both the Everglades and Bay-Delta restoration efforts include significant water supply components. Controversy over how much water should be divided among recovering (threatened and endangered) species, protecting water quality, and supplying farms, cities, and other uses has been ongoing. Further, widespread drought throughout different parts of the country over the past several years has spurred new requests for developing and ensuring dwindling water supplies, and new security threats to water infrastructure have placed added pressures on budgetary resources. The 110 th Congress left pending several national water policy proposals, ranging from new water study commissions and assessments to climate change research and monitoring, some of which have been reintroduced in the 111 th Congress. The 111 th Congress also may address water resource issues during consideration of WRDA legislation and FY2010 appropriations for Reclamation and the Corps. Specific issues that are being or may be discussed during the 111 th Congress are treated below. Other general issues may include federal reserved water rights in relation to federal lands, transfer of water across federal lands and through federal facilities, Indian water rights settlements, licensing of nonfederal hydropower facilities (i.e., private dams regulated by the Federal Energy Regulatory Commission (FERC)), and whether to establish a national water commission to address federal water policy and coordination. Most of the large dams and water diversion structures in the United States were built by, or with the assistance of, Reclamation or the Corps. Traditionally, Reclamation projects were designed principally to provide reliable supplies of water for irrigation and some municipal and industrial uses; Corps projects were designed principally to reduce flooding, improve navigation, and generate power. Reclamation currently manages more than 600 dams and reservoirs in 17 western states, providing water to approximately 10 million acres of farmland and 31 million people, as well as 58 power plants capable of producing 40 billion kilowatt hours of electricity (enough to serve six million homes). The Corps' operations are much more widespread and diverse, and include several thousand flood damage reduction and navigation projects throughout the country, including nearly 12,000 miles of commercially active waterways, nearly 1,000 harbors, and 600 dam and reservoir projects (with 75 hydroelectric plants generating 68 billion kilowatt hours annually). Additionally, the Corps constructed, usually with nonfederal participation, roughly 9,000 miles of the estimated 30,000 miles of the nation's levees, but only maintains 600 miles. The remaining levees are operated by nonfederal entities, often special districts of local governments, which are responsible for maintaining the level of protection they provide. Congress authorizes Corps water resources activities and makes changes to the agency's policies generally in Water Resources Development Acts.