Mosquito of Harrison Watershed Site 5-2 is a local government-owned dam located in Neola, Iowa, along the TR-Mosquito Creek. Built in 1988 by the USDA NRCS, this earth dam serves multiple purposes, including fire protection, stock maintenance, and flood risk reduction. With a height of 43 feet and a length of 850 feet, the dam provides a normal storage capacity of 37 acre-feet, covering a surface area of 6.2 acres and draining a 1.57 square mile watershed.

Managed by the Iowa DNR, Mosquito of Harrison Watershed Site 5-2 has a low hazard potential and is currently rated as not assessed for condition. While the dam has not been modified in recent years, it is subject to state regulation, permitting, inspection, and enforcement. The risk assessment for this dam is rated as moderate (3), indicating a level of potential risk that requires management measures to ensure the safety and integrity of the structure. Overall, this dam plays a crucial role in water resource management and climate resilience efforts in the Harrison Watershed area, highlighting the importance of sustainable infrastructure for environmental protection and community safety.