West Douglas Watershed Site L-12 in Iowa is a local government-owned dam with a primary purpose of fire protection, stock, or small fish pond, as well as flood risk reduction. Built in 1968 by USDA NRCS, this earth dam stands at a height of 33 feet and has a storage capacity of 32 acre-feet. The dam is located in Adams County, near the city of Villisca, along the TR-Middle Nodaway River.

With a drainage area of 0.09 square miles, West Douglas Watershed Site L-12 has a low hazard potential and a moderate risk assessment rating. The dam is state-regulated by the Iowa Department of Natural Resources, with permitting, inspection, and enforcement conducted by state agencies. Although the condition assessment is not rated, the dam is currently considered to be in a satisfactory condition. Overall, this dam plays a crucial role in managing water resources and protecting the surrounding area from potential flooding events.