Lewis Dam 3639, located in Culbertson, Nebraska, is a privately owned earth dam primarily used for fire protection and as a stock or small fish pond. Built in 1960, this dam stands at a height of 26.1 feet and has a storage capacity of 118.7 acre-feet with a normal storage level of 11.4 acre-feet. The dam spans 235 feet in length and covers a surface area of 4.5 acres, serving the purpose of regulating water flow along the TR-Frenchman River.

Managed by the Nebraska Department of Natural Resources, Lewis Dam 3639 is classified as having a low hazard potential and is currently rated as 'Not Rated' in terms of its condition assessment. The dam has state jurisdiction and is subject to regular state permitting, inspection, and enforcement to ensure its safety and functionality. While the dam has not been modified in recent years and does not have an emergency action plan in place, its overall risk assessment and management measures remain unspecified.

Water resource and climate enthusiasts can appreciate Lewis Dam 3639 for its role in supporting local water management efforts and providing essential services like fire protection and stock watering. With its strategic location in Hitchcock County, Nebraska, this dam contributes to the sustainable use of water resources in the region while highlighting the importance of maintaining and monitoring infrastructure for long-term resilience against potential hazards.