Nyman Lake, located in Allen County, Kansas, is a privately owned dam constructed by the USA WPA with the primary purpose of flood risk reduction. The dam, classified as an Earth dam with a buttress core type, stands at a height of 16 feet and has a hydraulic height of 15 feet. With a storage capacity of 106 acre-feet and a surface area of 5.74 acres, Nyman Lake plays a crucial role in managing water resources in the area.

The dam's low hazard potential and moderate risk assessment make it a reliable structure for flood control and water management. Despite not having a designated inspection frequency or condition rating, Nyman Lake remains an essential asset for the local community in Shaw City. With no associated structures and no outlet gates, the dam's uncontrolled spillway width of 78 feet ensures proper water discharge during periods of heavy rainfall, contributing to the overall resilience of the region's water infrastructure.

Nyman Lake's strategic location on Big Creek Rocky Branch-TR, as part of the Kansas City District, highlights its significance in the broader water resource management system. While not regulated or inspected by state agencies, the dam's design and purpose align with the need for effective flood risk reduction measures in the region. As climate change impacts continue to affect water resources, Nyman Lake stands as a vital asset in safeguarding against potential flooding and ensuring the sustainable management of water in Allen County, Kansas.