Mosca, also known as Smith, is a privately owned irrigation dam located in Huerfano County, Colorado. Built in 1915, this earth dam stands at 7 feet high and spans 550 feet in length, with a storage capacity of 112 acre-feet. The dam serves multiple purposes including irrigation, fire protection, and supporting fish and wildlife habitats. Situated along the Huerfano River, Mosca plays a crucial role in managing water resources in the region.

Despite being classified as having a low hazard potential, Mosca is considered to have a high risk level due to its age and condition assessment being rated as "Not Rated." The last inspection of the dam took place in July 1978, highlighting the need for regular monitoring and maintenance to ensure its structural integrity and safety. While the dam currently does not have a spillway, it is regulated by the Colorado Division of Water Resources, which oversees its permitting, inspection, and enforcement to mitigate potential risks associated with its operation.

For water resource and climate enthusiasts, Mosca presents an intriguing case study of a historic irrigation dam in need of modernization and risk management measures. With its location in a scenic part of Colorado and its importance for supporting agricultural activities and local ecosystems, the preservation and maintenance of Mosca are essential for sustainable water management practices in the region. As discussions around climate change and water scarcity continue, the future of Mosca will be closely monitored to ensure its continued functionality and safety for the community it serves.