Located in Platteville, Colorado, the Logan dam serves as a vital water resource for irrigation purposes along the St. Vrain Creek. Built in 1882, this private-owned earth dam stands at a height of 10 feet and spans 1200 feet in length, with a storage capacity of 50 acre-feet. Despite being relatively small in size, the dam plays a crucial role in providing water for fire protection, stock, irrigation, and recreational activities in the area.

With a low hazard potential and a high risk assessment rating, the Logan dam is subject to regular state regulation, inspection, and enforcement to ensure its safety and functionality. Although the dam's condition assessment is currently not rated, its historical significance and ongoing role in water management highlight the importance of continued monitoring and maintenance. As a key feature in the local water infrastructure, the Logan dam showcases the intersection of human engineering with natural resources, serving as a reminder of the delicate balance between water utilization and conservation in a changing climate.