Colby Dam, located in Clive, Iowa, is a privately owned structure designed by the USDA NRCS and regulated by the Iowa DNR. Completed in 1968, this earth dam stands at a height of 26 feet and spans 332 feet in length, with a primary purpose of fire protection, stock, or small fish pond. The dam has a storage capacity of 99 acre-feet and covers a surface area of 6.4 acres, serving as a vital resource for water management in the area.

Despite its low hazard potential, Colby Dam plays a crucial role in mitigating flooding and providing recreational opportunities in the region. The dam's uncontrolled spillway and soil foundation contribute to its efficient operation, with a moderate risk assessment rating of 3. While the dam's condition is currently not rated, its presence ensures the protection of the surrounding community and wildlife, making it a key component of the local water resource infrastructure.

As enthusiasts of water resources and climate, the intricate details of Colby Dam's construction, purpose, and management offer insight into the importance of sustainable water infrastructure. With its strategic location on Walnut Creek and close proximity to the Rock Island District, this dam exemplifies the collaborative efforts between private ownership, government agencies, and environmental conservationists in safeguarding water resources for future generations.