Koch is a privately owned dam located in Phillips County, Colorado, near the city of Holyoke. Completed in 1947, this earth dam serves multiple purposes, including fire protection, stock water supply, and recreational use. It also plays a role in flood risk reduction for the area. The dam has a height of 15 feet and a length of 350 feet, with a storage capacity of 180 acre-feet and a maximum discharge rate of 6000 cubic feet per second.

Situated on the South Fork of Frenchman Creek, Koch Dam has a spillway width of 200 feet and is classified as having a low hazard potential. Although the condition assessment is not rated, it meets state regulatory standards for inspection, permitting, and enforcement. With a moderate risk assessment rating, the dam is subject to regular inspections every 6 years to ensure its safety and functionality. While the dam has not been modified in recent years, it remains an important water resource in the region for both agricultural and recreational purposes.

Overall, Koch Dam serves as a vital infrastructure for water management in Phillips County, Colorado, providing essential services for fire protection, livestock, and recreation. As a privately owned structure, it is subject to state regulations and inspections to ensure its continued safe operation. With a strong emphasis on risk management and hazard prevention, Koch Dam plays a crucial role in the local water resource and climate landscape.