The Nucla 3rd Ave Reservoir, also known as the Old Town Reservoir, is a historic water body located in Nucla, Colorado. This local government-owned reservoir serves primarily for recreation purposes, offering opportunities for fishing, boating, and other water-based activities. Built in 1940, this stone dam structure stands at a height of 13 feet and has a storage capacity of 16 acre-feet, with a normal storage level of 11 acre-feet.

Managed and regulated by the Colorado Department of Water Resources, the Nucla 3rd Ave Reservoir is considered to have significant hazard potential but is currently assessed to be in fair condition. The reservoir features an uncontrolled spillway and outlet gates for water release. Despite its smaller surface area of 3 acres, the reservoir plays a crucial role in debris control and contributes to the recreational appeal of the surrounding area. With a moderate risk assessment rating, the reservoir is subject to regular inspections and maintenance to ensure its safety and functionality for the community.

Situated along the San Miguel River, this charming reservoir offers a peaceful retreat for water resource and climate enthusiasts to appreciate the beauty of the Montrose County landscape. With its rich history and scenic surroundings, the Nucla 3rd Ave Reservoir remains a treasured local gem that continues to provide both recreational enjoyment and essential water management benefits for the region.