SOUTH-CAROLINA RESERVOIR REPORT

Last Updated: January 5, 2026

The United States' dam and reservoir systems are vital pieces of infrastructure, serving numerous functions from water supply, flood control, recreation, and hydroelectric power generation. A comprehensive analysis of the latest observational data reveals a mixed picture of the nation's water storage levels, which vary significantly across different regions and states.

Many of the nation's reservoirs are experiencing fluctuations in storage levels, with some noting significant divergences from their average measures. For instance, Lake Mead in Nevada, a cornerstone of water supply for the arid Southwest, is currently at a storage level of approximately 8,609,966 acre-feet, a notable decrease from its average of 17,986,418.88 acre-feet, indicating prolonged drought conditions. Conversely, reservoirs like Lake Almanor in California are reporting storage levels significantly above average (1,094,528 acre-feet compared to the average 895,289.67 acre-feet), reflecting abundant inflows. These variations point towards broader climatic trends, including altered precipitation patterns and potential climate change impacts. In areas where reservoir levels are critically low, such as Elephant Butte Reservoir in New Mexico with a current storage of 166,075 acre-feet against an average of 829,488.39 acre-feet, water management strategies and conservation efforts become increasingly urgent to sustain supply and ecosystem health.

Moreover, multipurpose reservoirs like the Flaming Gorge in Utah showcase robust storage at approximately 2,998,229 acre-feet against an average of 2,915,156.59 acre-feet. This suggests effective resource management and possibly higher inflows from upstream snowpack melt or increased precipitation. However, the current conditions of reservoirs like Caballo Reservoir in New Mexico, with storage at 15,556 acre-feet compared to its average of 71,067.83 acre-feet, raise concerns about long-term water availability and the need for stringent water allocations.

In conclusion, while some reservoirs are managing to maintain or exceed average water levels, others are facing critical shortages, underscoring the importance of regional water management practices and the need to adapt to changing hydrological conditions. As stewards of these vital water resources, it is imperative that we continually monitor, analyze, and respond to these trends to safeguard our water supplies for the future.

South Carolina has numerous small and large reservoirs and dams that play an important role in providing water for domestic, agricultural, and industrial purposes. Some of the major reservoirs in the state include Lake Marion, Lake Moultrie, Lake Murray, and the Jocassee Reservoir. These reservoirs are fed by various streams, rivers, and creeks, including the Savannah River, Catawba River, Broad River, and Saluda River. The hydrology of South Carolina is influenced by its location in the southeastern United States and its proximity to the Appalachian Mountains. The state receives ample rainfall throughout the year, with occasional drought conditions during the summer months. The mountains in the western part of the state contribute to snowpack, which can affect streamflow and reservoir levels during the spring and early summer. Record flooding has occurred in South Carolina in recent years, such as the 2015 floods that resulted in widespread damage and loss of life. In contrast, drought conditions have also been experienced, such as the severe drought in 2016 that led to water restrictions and low reservoir levels. Seasonal trends in streamflow and reservoir levels vary depending on rainfall patterns and other factors.

South Carolina has numerous small and large reservoirs and dams that play an important role in providing water for domestic, agricultural, and industrial purposes. Some of the major reservoirs in the state include Lake Marion, Lake Moultrie, Lake Murray, and the Jocassee Reservoir. These reservoirs are fed by various streams, rivers, and creeks, including the Savannah River, Catawba River, Broad River, and Saluda River.

The hydrology of South Carolina is influenced by its location in the southeastern United States and its proximity to the Appalachian Mountains. The state receives ample rainfall throughout the year, with occasional drought conditions during the summer months. The mountains in the western part of the state contribute to snowpack, which can affect streamflow and reservoir levels during the spring and early summer.

Record flooding has occurred in South Carolina in recent years, such as the 2015 floods that resulted in widespread damage and loss of life. In contrast, drought conditions have also been experienced, such as the severe drought in 2016 that led to water restrictions and low reservoir levels. Seasonal trends in streamflow and reservoir levels vary depending on rainfall patterns and other factors.