Valmont 'A' is a significant water supply infrastructure located in Boulder, Colorado, along the Boulder Creek-TR stream. Completed in 1962, this earth dam stands at a height of 67 feet, with a hydraulic height of 58 feet and a structural height of 80 feet. It serves the primary purpose of water supply for irrigation and other uses in the region, with a storage capacity of 15,950 acre-feet and a normal storage level of 11,234 acre-feet.

The dam's design includes an uncontrolled spillway with a width of 108 feet to manage maximum discharges of up to 6,752 cubic feet per second. With a hazard potential rated as high and a fair condition assessment as of November 2020, Valmont 'A' is regulated by the Colorado Department of Water Resources, with state permitting, inspection, and enforcement in place. Despite its moderate risk level, the dam holds a crucial role in maintaining water resources in the area and ensuring the safety of surrounding communities in case of emergencies.

Owned privately, Valmont 'A' is part of the water infrastructure network in Colorado, contributing to the sustainable management of water resources in the region. Its association with the Boulder Creek-TR stream highlights its significance in providing water supply for various purposes, emphasizing the importance of maintaining and monitoring its condition to ensure continued functionality and safety for the community.