COLORADO RESERVOIR REPORT

Last Updated: March 15, 2026

Colorado's dam and reservoir systems are experiencing a mix of conditions, with some reservoirs reporting lower than average storage levels, while others are seeing higher volumes. Notably, Teller Reservoir, with no current level reported, seems to be an outlier. Trinidad Lake is slightly above its average at 6187 feet, contrasting with John Martin Reservoir, which is below its average elevation at 3806 feet. Similarly, Rifle Gap Reservoir and Vega Reservoir show reduced water surface elevations at 5915 and 7940 feet respectively, indicating potential water scarcity. On the storage front, Granby Reservoir's current storage of 321,770 acre-feet is significantly lower than its average of 384,796.56 acre-feet, whereas Pueblo Reservoir exhibits an increase, with 220,611 acre-feet compared to the average of 172,229.63. Contextually, these deviations may relate to the current water crisis affecting the Western United States, including abnormal snowpack and river flow patterns, as reported by multiple news outlets.

In particular, alarming trends such as the Colorado River's diminished flow to Lake Powell, regional drought conditions, and ongoing water restrictions in metro Denver hint at broader environmental stresses. The data reveals that significant reservoirs like Blue Mesa, Dillon, and Green Mountain are holding less water than average. Meanwhile, storage in reservoirs like Carter Lake and Horsetooth has increased, which could reflect local conservation measures or water management strategies responding to the crisis. These findings align with recent reports of power outages due to extreme weather conditions in Colorado, as well as broader concerns over future water shortages across multiple states. The management of these water resources is critical, as it impacts not just Colorado but downstream users all the way to California, where desalination projects are being considered as a supplementary water source. The Western United States is preparing for a variety of challenges, from blizzards to heat domes, all of which will have significant impacts on water availability and reservoir capacities moving forward.

Colorado has over 2,000 reservoirs, with the largest and most notable being Blue Mesa Reservoir, which is fed by the Gunnison River, and Lake Granby, which is fed by the Colorado River. Other major reservoirs include Dillon, Horsetooth, and Pueblo Reservoirs. These reservoirs provide water for irrigation, municipal use, and recreation. The water in these reservoirs primarily comes from snowmelt in the surrounding mountains, with the Colorado River and its tributaries being the largest source. The snowpack is closely monitored, as it is a key factor in determining the water supply for the year. The hydrology of the area is complex due to the high elevation and arid climate, with many streams and rivers running dry during drought conditions. Record levels have been seen in recent years due to heavy snowpack and precipitation, but drought conditions are a recurring issue in the state. Seasonal trends include higher water levels in the spring and early summer due to snowmelt, followed by a gradual decrease throughout the summer and fall. Overall, reservoirs and dams play a crucial role in water management in Colorado, with the state relying heavily on these sources for its water supply.

Colorado has over 2,000 reservoirs, with the largest and most notable being Blue Mesa Reservoir, which is fed by the Gunnison River, and Lake Granby, which is fed by the Colorado River. Other major reservoirs include Dillon, Horsetooth, and Pueblo Reservoirs. These reservoirs provide water for irrigation, municipal use, and recreation.

The water in these reservoirs primarily comes from snowmelt in the surrounding mountains, with the Colorado River and its tributaries being the largest source. The snowpack is closely monitored, as it is a key factor in determining the water supply for the year. The hydrology of the area is complex due to the high elevation and arid climate, with many streams and rivers running dry during drought conditions.

Record levels have been seen in recent years due to heavy snowpack and precipitation, but drought conditions are a recurring issue in the state. Seasonal trends include higher water levels in the spring and early summer due to snowmelt, followed by a gradual decrease throughout the summer and fall. Overall, reservoirs and dams play a crucial role in water management in Colorado, with the state relying heavily on these sources for its water supply.