Dam project at Big Beaver Lake moves toward construction after draining efforts

The Rio Blanco County Board of County Commissioners convened on April 8, 2025, to discuss several key updates, primarily focusing on the Big Beaver Lake Avery Dam project. The meeting began with an overview of the current status of the dam, which has undergone significant changes since the lake was drained last fall for safety reasons. The decision to drain the lake early aimed to prevent hazards associated with fluctuating water levels and ice.

The commissioners reported that the lake is currently being monitored for inflow and outflow water levels, with the goal of having the dam site completely dry by late June or early July to facilitate construction. A contractor has already been selected for the project, which includes repairing leaks in the head gate and addressing cracks in the outlet pipe. The dam is classified as a high hazard, prompting swift action to ensure its integrity.

In addition to structural repairs, the meeting highlighted the importance of sediment management and erosion mitigation. The commissioners discussed the creation of a stilling pool to capture sediment before it flows downstream, aiming to maintain water quality as runoff occurs.

The meeting also addressed the ecological impact of the lake's drainage. A public fish salvage was enacted, allowing anglers to remove fish from the lake, and over 300 adult black crappie were relocated to the Rio Blanco Reservoir. Future stocking plans will be developed in collaboration with the Upper Colorado River Recovery Program and neighboring states, ensuring compliance with regulations concerning endangered species.

Public comments during the meeting raised concerns about sediment monitoring and the potential for future fish kills. The commissioners assured attendees that they are committed to monitoring water quality and managing sediment effectively to prevent adverse ecological impacts.

Overall, the meeting underscored the county's proactive approach to managing the Big Beaver Lake Avery Dam project, balancing infrastructure needs with environmental stewardship. The next steps include continuing construction preparations and developing a comprehensive lake management plan to guide future stocking and ecological assessments.