Spencer Dam, located in Harrison County, Iowa, is a privately-owned earth dam completed in 2007 for the primary purposes of fire protection, stock, or small fish pond. With a height of 47 feet and a length of 378 feet, the dam holds a maximum storage capacity of 93 acre-feet and covers a surface area of 4.2 acres. Situated on TR- Harris Grove Creek, the dam is regulated by the Iowa Department of Natural Resources and is subject to state permitting, inspection, and enforcement.

Despite being classified as having a low hazard potential, Spencer Dam is deemed to have a moderate risk level due to various factors such as its location and structural characteristics. Although the condition assessment is currently marked as "Not Rated," the dam's risk management measures and emergency action plans are not fully documented. The dam is equipped with an uncontrolled spillway and has not experienced any significant modifications since its completion. While there have been no reported incidents or inspections in recent years, the dam remains an important asset for water resource management in the area.

Water resource and climate enthusiasts will find Spencer Dam to be an intriguing structure with its unique design and purpose. With its location on Harris Grove Creek and proximity to Missouri Valley, the dam serves as a vital resource for fire protection and water storage in the region. While it may pose a moderate risk level, the dam's low hazard potential and state-regulated status demonstrate a commitment to ensuring its safety and functionality for the surrounding community.