Allegheny River Lock and Dam 4, also known as Allegheny River Pool 04, is a federal-owned structure located in Brackenridge, Pennsylvania. Built by the US Army Corps of Engineers in 1927, this gravity dam serves primarily for navigation purposes on the Allegheny River. With a structural height of 29 feet and a length of 954 feet, the dam creates a reservoir with a storage capacity of 9,000 acre-feet and a surface area of 710 acres.

Despite being classified with a moderate risk assessment, the dam has operated without incident for over 80 years. Risk management measures are in place to ensure public safety and economic benefits, including routine monitoring, emergency action planning, and communication with external partners. In the event of a potential breach or flooding scenario, emergency exercises and comprehensive inspections are conducted to mitigate risks and protect residents and infrastructure in the area.

The US Army Corps of Engineers maintains a proactive approach to risk management, conducting regular assessments and surveillance to monitor the dam's condition and potential threats. By staying vigilant and prepared for emergencies, the agency aims to safeguard the integrity of the dam, prevent downstream flooding, and ensure the continued navigation and economic benefits provided by Allegheny River Lock and Dam 4.