Highland #3, also known as Foster, is a privately owned dam located in La Salle, Weld County, Colorado. Built in 1881, this earth dam stands at a height of 21 feet and has a length of 1660 feet. The primary purpose of Highland #3 is irrigation, with additional recreational uses. The dam has a storage capacity of 2704 acre-feet and a normal storage level of 1670 acre-feet.

This significant dam on the St. Vrain Creek-OS is regulated and inspected by the Colorado Department of Water Resources. It has a spillway width of 100 feet and a maximum discharge capacity of 1950 cubic feet per second. The dam is classified as having a significant hazard potential, but its condition assessment as of June 2019 is satisfactory. Highland #3 poses a moderate risk factor according to the data available, and it is crucial for water resource and climate enthusiasts to monitor its upkeep and safety measures for the surrounding community.

As one of the essential structures in the region for irrigation and recreation, Highland #3 serves a vital role in water management in Weld County, Colorado. Its historical significance and ongoing regulatory oversight make it an important site for those interested in the intersection of water resources and climate impacts on infrastructure. Monitoring its condition and risk assessment is key to ensuring the safety and efficiency of water usage in the area.