Charlotte, NC, August 21, 2025 — Glenn Industrial Group LLC was mobilized on an emergency basis to a hydroelectric facility in North Carolina following a failure during routine spillway gate testing. A floating caisson became dislodged, resulting in significant impact damage to the nearly 100-year-old spillway gate structure.

To stabilize the situation, Glenn worked in lockstep with plant personnel to manage reservoir levels and implemented real-time remote monitoring using an Aware Monitoring Systems IOT flood sensor. The caisson, pinned against the upstream gate faced by intense differential pressure, posed a structural risk to the entire gate assembly.

Glenn was tasked with the design, fabrication, and installation of a temporary downstream stop log system to equalize water pressure and enable safe caisson release. Once stabilized, the caisson was safely refloated and returned to storage. Glenn personnel performed immediate structural repairs to the damaged caisson.

Following its repositioning and reinstallation, the area between the caisson and the gate was dewatered, revealing severe damage to the lower gate section. Glenn and its subcontractors then replaced the entire lower section with new structural steel-executing all underwater welding and structural integration without requiring full gate removal. All work was completed under strict engineering oversight to ensure long-term structural integrity.

Decades of Expertise in High-Risk Marine Infrastructure

This operation is the latest in Glenn Industrial Group’s nearly 30-year history of delivering critical underwater and marine infrastructure solutions. Since 1999, the company has completed more than 12,000 projects, logged over 1,000,000 safe man-hours, and operates across six countries-including the United States, South America, the Middle East, and Asia.

Utility, energy, and municipal clients rely on Glenn for operations in extreme and hazardous underwater environments, including nuclear plants, hydroelectric dams, ports, and industrial pipelines.

“We deliver solutions where others can’t-combining diving, robotics, and engineering expertise with a safety-first mindset,” said Ryan Glenn, CEO.

“Every project reflects our commitment to quality, compliance, and operational excellence.”

Core Services

• Commercial Diving and Underwater Infrastructure Services-ADCI-certified commercial divers deliver a comprehensive range of underwater solutions, specializing in inspections, rehabilitation, maintenance, and construction. Our highly trained teams bring precision, safety, and expertise to every project, ensuring the integrity and longevity of critical underwater infrastructure.
• ROV Inspections & Robotics – 24+ proprietary ROVs for nuclear zones, deepwater, and confined-space inspections using sonar, HD video, dye testing, and vacuum tooling.
• Dredging – Hydraulic and mechanical dredging for intake and reservoir restoration, with HDPE lines, containment curtains, and bathymetric mapping.
• Salvage & Submerged Asset Recovery – Emergency retrieval of industrial assets using sonar, lift bags, and diver-ROV collaboration.
• Marine Construction – Above- and below-water structural repair integrated with diving operations.

Global Deployments & Safety Innovations

Recent deployments include post-Hurricane Helene dredging at a South Carolina hydroelectric plant and structural work at a major South American port. Glenn holds five U.S. patents in leak detection, grouting, and pipeline plugging tools, and operates under strict OSHA and ADCI standards.

About Glenn Industrial Group:

Headquartered in Charlotte, NC, Glenn Industrial Group is a specialized provider of commercial diving, ROV inspections, dredging, salvage, and marine construction. With regional operations in the Southeastern U.S. and project reach spanning six countries, the company is trusted for precision work in complex and extreme environments.

Media Contact:

Organization: Glenn Industrial Group

Address: 5325 Marshall Air Drive, Charlotte, NC 28217

Phone Number: (704) 540-9777

Email: [email protected]

Website: https://glennindustrialgroup.com/

Originally Posted On: https://syndication.cloud/glenn-industrial-group-executes-high-stakes-spillway-gate-emergency-at-north-carolina-hydroelectric-dam/