Franktown Parker Fpw-1, also known as Willow W-1, is a local government-owned earth dam located in Douglas County, Colorado. Completed in 1963 by the USDA NRCS, this structure serves the primary purpose of flood risk reduction along the Willow Creek-TR. With a dam height of 49 feet and a hydraulic height of 50 feet, Franktown Parker Fpw-1 has a storage capacity of 434 acre-feet and a maximum discharge of 1323 cubic feet per second.

The dam covers an area of 18 acres and has a spillway width of 32 feet, with uncontrolled spillway type. It has been classified as having a low hazard potential and fair condition assessment as of the last inspection in October 2014. The risk assessment for this dam is moderate, and it falls under the jurisdiction of the Colorado Department of Water Resources, with state permitting, inspection, and enforcement in place. For water resource and climate enthusiasts, Franktown Parker Fpw-1 stands as a vital infrastructure contributing to flood control efforts in the region.