Frederick, also known as Milavec Lake or Lower Boulder Extension, is a significant water resource located in Weld County, Colorado. Owned by the local government, this fish and wildlife pond serves multiple purposes, including irrigation and recreation. The dam, with a height of 19 feet and a length of 6862 feet, was completed in 1892 and has a storage capacity of 1331 acre-feet.

The dam has undergone several modifications over the years to ensure its structural integrity and hydraulic functionality. With a spillway width of 110 feet and a maximum discharge capacity of 1510 cubic feet per second, Frederick poses a significant hazard potential. However, the condition assessment conducted in April 2019 deemed the dam to be in satisfactory condition, with a moderate risk assessment rating of 3.

The Frederick dam is regulated by the Colorado Division of Water Resources and is subject to regular inspections and enforcement measures. With its historical significance and importance in supporting fish and wildlife habitats, Frederick remains a key water resource in the region, attracting water resource and climate enthusiasts alike.