Cove Point Lng Main Dam, also known as Columbia Lng Main Dam, is a privately owned dam located in Cove Point, Maryland. The dam was completed in 1974 and serves primarily for recreational purposes, with a storage capacity of 830 acre-feet and a surface area of 23.3 acres. The dam stands at a height of 74 feet and has a structural height of 78 feet, with a hydraulic height of 72 feet.

The dam is situated on Wilbur Creek and is regulated by the Maryland Dam Safety agency, with regular inspections and enforcement measures in place to ensure its safety and functionality. The hazard potential of the dam is considered significant, with a fair condition assessment as of April 2021. The dam has an uncontrolled spillway with a width of 4 feet, and a maximum discharge capacity of 172 cubic feet per second.

Overall, Cove Point Lng Main Dam plays a crucial role in water resource management in the area, providing recreational opportunities while also mitigating flood risks and ensuring water supply reliability. Its design and construction were carried out by URS and Woodward Moorhouse & Assoc, and the dam has undergone structural modifications in 1999 to enhance its resilience. With moderate risk assessment and ongoing risk management measures, Cove Point Lng Main Dam remains a vital component of the region's water infrastructure.