TENNESSEE RESERVOIR REPORT

Last Updated: January 1, 2026

In the latest observations across the nation's dams and reservoirs, a comprehensive assessment reveals a mixed landscape of water storage levels, with variances that reflect the diverse climatic conditions and water management strategies at play. Some regions are experiencing surpluses, while others face droughts, underscoring the importance of adaptive water management.

Among the reservoirs recording higher than average storage levels are Lake Almanor in California, which currently holds over a million acre-feet more than its average, signifying a surplus that benefits local ecosystems and water supply. Conversely, Lake Powell in Arizona reflects a stark deficit, with its storage levels falling approximately 8 million acre-feet short of the average, indicative of the prolonged drought affecting the Colorado River Basin. Similarly, New Mexico's Elephant Butte Reservoir storage is significantly below its historical average, echoing water scarcity concerns in the Southwest. These conditions not only impact water availability for human consumption but also have far-reaching effects on agriculture, hydroelectric power generation, and natural habitats. The variances in reservoir levels can often be traced back to factors such as snowpack levels, river flows, and regional precipitation patterns, which are influenced by broader climatic shifts and require ongoing monitoring and responsive water management strategies to ensure sustainable use and conservation of this vital resource.

Tennessee has numerous reservoirs and dams, with major ones including the Kentucky Lake, Chickamauga Lake, and Norris Lake. These reservoirs are fed by rivers such as the Tennessee River, Cumberland River, and Clinch River, as well as various creeks and streams. Snowpack and mountain runoff can also contribute to the water supply. The general hydrology of the area is influenced by the Appalachian Mountains and the Gulf of Mexico, with precipitation varying greatly throughout the year. Record high water levels have been observed in the past, and drought conditions can also occur, particularly during the summer months. Seasonal trends include higher water levels during the spring due to snowmelt and increased precipitation, while water levels typically decrease during the summer and fall months.

Tennessee has numerous reservoirs and dams, with major ones including the Kentucky Lake, Chickamauga Lake, and Norris Lake. These reservoirs are fed by rivers such as the Tennessee River, Cumberland River, and Clinch River, as well as various creeks and streams. Snowpack and mountain runoff can also contribute to the water supply. The general hydrology of the area is influenced by the Appalachian Mountains and the Gulf of Mexico, with precipitation varying greatly throughout the year. Record high water levels have been observed in the past, and drought conditions can also occur, particularly during the summer months. Seasonal trends include higher water levels during the spring due to snowmelt and increased precipitation, while water levels typically decrease during the summer and fall months.