Cottonwood Creek 42-A is a local government-owned dam in Saunders County, Nebraska, designed by the USDA NRCS and regulated by the NE DNR. Completed in 1967, this earth dam stands at a height of 38 feet and has a storage capacity of 277 acre-feet, primarily serving the purpose of flood risk reduction in the region. With a drainage area of 0.8 square miles, the dam has a low hazard potential and is in satisfactory condition as of the last assessment in June 2016.

Located in MALMO, Nebraska, Cottonwood Creek 42-A is an essential structure for managing water resources in the area, with a maximum discharge capacity of 1017 cubic feet per second. The dam spans 815 feet in length and covers a surface area of 10 acres, providing critical protection against flooding events. While the dam has not been modified in recent years, it undergoes regular inspections every five years to ensure its continued effectiveness in safeguarding the community and surrounding areas.