Rhodhiss Hydroelectric Dam Rehabilitation

Marine, structural, and underwater rehabilitation work was performed at the historic Rhodhiss Hydroelectric Station on the Catawba River in North Carolina. Lake Rhodhiss, formed by the impoundment of Rhodhiss Dam, serves as a critical water source for the communities of Granite Falls, Lenoir, Morganton, and Valdese.

The scope included underwater debris removal to clear intake areas and restore efficient water flow, followed by installation of a trash rack and stop log (TRSL) system to improve debris management and operational performance. Structural steel was fabricated and installed as part of the upgrades, with precision coring and wire sawing utilized to execute accurate structural modifications and repairs.

Diver-led repairs were coordinated with third-party engineering oversight to ensure safety, accuracy, and compliance in the underwater environment. Upon completion, unit commissioning and full system recommissioning were performed to confirm reliable operation and integration with the facility’s hydroelectric systems.

This work supported the continued maintenance and modernization of the century-old Rhodhiss facility, preserving long-term reliability and renewable energy production.

Cooper Tacia has integrated Atlantis Marine into its operations, strengthening and expanding its civil and marine capabilities. For this project, Atlantis Marine acted in a construction management role, coordinating closely with other contractors to ensure successful delivery. The work reflects the depth of experience, leadership, and technical expertise now embedded within Cooper Tacia’s Civil & Marine Division. Original project ownership, contractual relationships, and client engagements remain with the respective entities. Project information is shared for illustrative purposes only.