Langenfeld - Heiden Dam, located in Denison, Iowa, is a privately-owned earth dam designed by the USDA NRCS and completed in 2000. The dam serves the primary purpose of grade stabilization along the Tr- East Boyer River, with a height of 44 feet and a length of 527 feet. It has a storage capacity of 28 acre-feet and covers a surface area of 2.6 acres, with a drainage area of 0.12 square miles.

Despite being classified as having a low hazard potential, Langenfeld - Heiden Dam is rated as having a moderate risk level. The dam features an uncontrolled spillway with a width of 1 foot and is not currently regulated, inspected, or enforced by state agencies. While its condition assessment is listed as "Not Rated," the dam has not undergone any recent modifications or inspections. Overall, Langenfeld - Heiden Dam presents an opportunity for water resource and climate enthusiasts to explore the intersection of infrastructure, conservation, and risk management in the context of sustainable water resource development.

As one of the key structures in the area for grade stabilization, Langenfeld - Heiden Dam highlights the importance of proper dam design, construction, and maintenance in managing water resources effectively. Its location within the Rock Island District and proximity to the East Boyer River underscores the critical role of dams in maintaining water quality, preventing erosion, and regulating water flow. With its unique characteristics and moderate risk level, the dam offers a valuable case study for enthusiasts interested in understanding the complexities of dam management and the challenges of balancing conservation efforts with infrastructure development in a changing climate.