MS06411-MS06411-LAKE-DAM RESERVOIR REPORT

Last Updated: January 28, 2026

The United States' network of dams and reservoirs is a critical component of the nation's infrastructure, providing water for irrigation, domestic use, industrial activities, and hydroelectric power, as well as contributing to flood control and recreation. However, these water resources are subject to a variety of environmental and human pressures which can lead to fluctuations in storage levels. The current observations from a comprehensive dataset reveal a mosaic of conditions across the country, showcasing both areas of surplus and regions experiencing drought-induced deficits.

For instance, Lake Winnipesaukee in New Hampshire is currently below its average gage height, indicating a possible water deficit, while the Wanaque Reservoir in New Jersey is significantly below its average water surface elevation, raising concerns about potential water scarcity and its impact on local communities and ecosystems. Conversely, reservoirs such as General Edgar Jadwin in Pennsylvania and Maurice R at Union Lake Dam in New Jersey are showing current levels above average, suggesting surplus conditions which could be attributed to recent precipitation events or controlled water management strategies.

In terms of storage, major water bodies like Lake Powell in Arizona and Elephant Butte in New Mexico report storage capacities significantly lower compared to historical averages – a classic signal of prolonged drought conditions that the southwestern states have been battling. On the other hand, reservoirs such as Lake Almanor in California and Trinity Lake have storage levels that surpass their averages, possibly linked to strategic water management or variations in inflow.

These conditions not only illustrate the complexity of managing water resources in a changing climate but also underscore the importance of cross-referencing multiple data sources to paint an accurate picture of water availability. For water management researchers and hydrologists, such insights are invaluable for developing strategies to balance water use with conservation, ensuring sustainability for future generations. As the nation continues to experience varied hydrologic conditions, vigilant monitoring and adaptive management of its dams and reservoirs remain imperative.