Located in Cass, Nebraska, the Copper Penny Dam is a privately owned structure on TR-Eight Mile Creek designed for irrigation purposes. Completed in 1980, this earth dam stands at 30 feet high with a hydraulic height of 28 feet and a structural height of 38 feet. With a storage capacity of 312 acre-feet and a drainage area of 0.6 square miles, the dam serves as a vital resource for water management in the region.

Managed by the Nebraska Department of Natural Resources, the Copper Penny Dam has a low hazard potential and a fair condition assessment as of the last inspection in April 2019. While the dam has no spillway, it is equipped to handle a maximum discharge of 300 cubic feet per second. The dam's location in Plattsmouth, along with its stone core and soil foundation, underscores its importance in maintaining water supply and controlling flooding in the area.

As a key component of the local water infrastructure, the Copper Penny Dam plays a crucial role in supporting agricultural activities and water resource management in the region. With its capacity to store 226 acre-feet of water and cover a surface area of 26 acres, this dam stands as a testament to effective water resource management in Nebraska. Its regulation, inspection, and enforcement by the NE DNR ensure the safety and efficiency of its operations, making it an essential asset for the community and the environment.