ALASKA RESERVOIR REPORT

Last Updated: December 13, 2025

Alaska's dams and reservoirs have faced significant challenges recently due to extreme weather events. Hurricane-force winds and floods have struck the region, causing various degrees of impact on water storage and infrastructure. The Matanuska-Susitna Borough, in particular, declared a disaster in response to these conditions. Despite the lack of specific numerical data from the provided sources regarding dam storage levels, it is clear that these events have tested the resilience of water management systems across the state. The aftermath of these weather phenomena has necessitated an assessment of the structural integrity and capacity of Alaska’s dams and reservoirs, highlighting the need for a comprehensive review of emergency response plans and infrastructure reinforcement strategies.

Cross-referencing the anecdotal evidence with data from relevant hydrological and meteorological agencies would offer a clearer picture of the storage levels. However, based on the sources provided, it can be inferred that the storage capacities of the reservoirs may have been compromised. The record flooding and hurricane-force gusts reported by The Weather Channel and AOL.com, respectively, suggest that reservoirs in affected areas likely experienced sudden and substantial increases in inflow. This could have led to water levels rising beyond normal operating ranges, potentially causing spillway discharges and stressing dam structures. The situation underscores the importance of robust dam surveillance and maintenance programs, as well as the implementation of adaptive management practices to cope with the increasingly volatile weather patterns associated with climate change. To ensure the safety and efficiency of these critical water resources, continual monitoring and updates to emergency action plans are essential, especially in light of the extreme weather events that are becoming more frequent in regions like Alaska.

Alaska has over 1,000 named lakes and reservoirs, with the largest ones being used for hydroelectric power generation, flood control, and water supply. The major reservoirs include Eklutna Lake, Chena Lake, and the Bradley Lake Reservoir, which are fed by glaciers, snowmelt, and several rivers and creeks. The snowpack in the mountains is a vital source of water, and the timing of its melting affects the streamflow and reservoir levels. The hydrology in the area is complex, with various geological formations and climatic patterns. Alaska has experienced record-high temperatures and drought conditions in recent years, leading to reduced water availability in some areas. However, the seasonal trends, such as the increased precipitation during the summer months and the snow accumulation during the winter, generally ensure sufficient water supply for the state's needs.

Alaska has over 1,000 named lakes and reservoirs, with the largest ones being used for hydroelectric power generation, flood control, and water supply. The major reservoirs include Eklutna Lake, Chena Lake, and the Bradley Lake Reservoir, which are fed by glaciers, snowmelt, and several rivers and creeks. The snowpack in the mountains is a vital source of water, and the timing of its melting affects the streamflow and reservoir levels. The hydrology in the area is complex, with various geological formations and climatic patterns. Alaska has experienced record-high temperatures and drought conditions in recent years, leading to reduced water availability in some areas. However, the seasonal trends, such as the increased precipitation during the summer months and the snow accumulation during the winter, generally ensure sufficient water supply for the state's needs.