Misteguay Creek 2a, also known as the Allen Road Dam, is a privately owned structure located in New Lothrop, Michigan. Built in 1966 by the USDA NRCS, this earth dam stands at a height of 29 feet and spans 1150 feet along Misteguay Creek. Its primary purpose is flood risk reduction, serving to protect the surrounding area from potential inundation during periods of high discharge.

Managed by the Michigan DEGLE, Misteguay Creek 2a is regulated, inspected, and enforced by state agencies to ensure its structural integrity and safety. With a low hazard potential and a satisfactory condition assessment as of September 2018, the dam poses a moderate risk level (3) according to risk assessments. While the dam currently does not have a designated Emergency Action Plan (EAP), it meets regulatory guidelines and has emergency contacts in place for any potential incidents.

Despite its low hazard potential, Misteguay Creek 2a plays a crucial role in mitigating flood risks in the area, with a maximum discharge capacity of 10,800 cubic feet per second. As a key component of water resource management in Shiawassee County, this dam stands as a testament to the importance of maintaining infrastructure to protect against the impacts of climate change and extreme weather events in the region.