JGM was selected by Exelon Power to develop and execute a complex engineering and construction solution supporting ongoing maintenance operations at the Conowingo Dam, one of the region’s most critical hydroelectric facilities. The project required an innovative approach that would allow essential maintenance to continue while preserving the dam’s ability to safely manage water flow and maintain uninterrupted operations.
To meet these objectives, JGM engineered a comprehensive rigging, transportation, and temporary works solution that relocated crest gate maintenance activities approximately 1,000 yards from the dam to a dedicated maintenance area. At the heart of the project was the design and construction of a custom temporary maintenance structure, eliminating the need for extensive excavation and permanent foundations while significantly accelerating the project schedule.
Working in close coordination with Exelon Maintenance, Conowingo Dam Operations, county officials, and the Maryland Department of Transportation, JGM developed and implemented a detailed execution plan that minimized operational disruptions, reduced impacts to the surrounding community, and safely integrated complex transportation logistics. The innovative approach shortened the overall project schedule to just eight weeks while maintaining uninterrupted facility operations.
Each crest gate measures approximately 40 feet long, 28 feet tall, and 4 feet wide, with an individual weight exceeding 45 tons. JGM continues to transport these massive components multiple times each year, demonstrating the company’s expertise in heavy lifting, engineered rigging, specialized transportation, and mission-critical infrastructure support.
This project showcases JGM’s ability to deliver turnkey engineering, fabrication, heavy transport, and construction solutions for complex industrial and energy infrastructure projects where safety, schedule certainty, and operational continuity are paramount.