Straight Dam, located in Missouri Valley, Iowa, is a privately owned earth dam designed by the USDA NRCS with a primary purpose of flood risk reduction. Completed in 2011, the dam stands at a height of 39 feet and spans a length of 520 feet. With a storage capacity of 73 acre-feet, the dam serves multiple purposes including fish and wildlife pond creation, grade stabilization, and recreation on its 2-acre surface area.

Managed by the Iowa DNR, Straight Dam is regulated and permitted by the state, with regular inspections and enforcement measures in place. Despite its low hazard potential and current condition assessment of "Not Rated", the dam plays a crucial role in protecting the surrounding area and aiding in water resource management. While lacking an emergency action plan and updated risk assessment, Straight Dam remains a vital structure for the local community and the tributary to Willow Creek.

Straight Dam's construction was funded by the Natural Resources Conservation Service, showcasing a collaboration between federal and state agencies to address flood risk and water resource needs in the region. As a part of the Rock Island District, the dam provides flood protection, habitat enhancement, and recreational opportunities, demonstrating the importance of sustainable water management practices in a changing climate.