Phoenix Conducts Underwater Inspection of Wishon Dam
Phoenix International Holdings, Inc. (Phoenix), in partnership with Underwater Acoustic International, L.L.C. (UAI) and Ocean Tech Services (OTS), mobilized a sonar team and Remotely Operated Vehicle (ROV) team to the Wishon Reservoir to perform a comprehensive underwater acoustic imaging and visual inspection of the Wishon Dam for the Pacific Gas and Electric Company (PG&E).
The intent of the inspection was to collect a baseline of current conditions to enable planning for effective repair and remediation. The acoustic imaging was accomplished utilizing a high resolution Underwater Acoustic Steered Beam Imaging system from UAI. The visual inspection was performed using an inspection class ROV. Operators maneuvered the ROV along the dam face to collect visual images of areas identified in the acoustic imaging inspection. The results of this acoustic and visual inspection were provided to PG&E within a 100+ page report that included mosaic images of the acoustic data and visual images from the ROV to provide a clear picture of the underwater condition of the dam.
Phoenix is an employee-owned, ISO 9001-2015 Management System certified marine services contractor providing manned and unmanned underwater solutions, design engineering, and project management services to a diverse set of clients worldwide. Expertise is available from seven regional offices in the areas of wet and dry hyperbaric welding, Nondestructive Testing, (NDT), subsea engineering services, conventional and atmospheric diving, Autonomous Underwater Vehicle (AUV) and ROV operations. The company’s capabilities are directed to underwater inspection, maintenance, and repair; deep ocean survey, search and recovery operations; submarine rescue; construction; subsea tieback; plug and abandonment; subsea mining; archaeological; and documentary projects.
UAI (a subsidiary of C. H. Fenstermaker & Associates, L.L.C.) specializes in the utilization of underwater acoustic remote sensing for the investigation, imaging and modeling of submerged structures and the adjacent water bottom environments. Fenstermaker develops and deploys custom configured sensors, deployment platforms and software packages that are designed to specifically address the needs of the Hydro-Electric Dam Operator. OTS provides marine environmental measurement and operational maritime support to a wide range of industries.
UNDERWATER ACOUSTICS INTERNATIONAL SELECT THE ISS360 IMAGING SONAR
Underwater Acoustics International (UAI) have chosen the ISS360 Imaging Sonar for installation on their Seamor Chinook ROV.
The ISS360 sonar is the world’s smallest imaging sonar, providing a full 360° field of view around the underwater vehicle. The ISS360 Sonar can detect targets within a range of 90 meters and has a unique inductive coupling of the transducer to enable maintenance-free long term operation.
Ryan Wallace, UAI Project Manager commented “The ISS360 has been an amazing ROV Navigation tool for us and does not take up any real estate on our sub. The software does not get any easier to operate and the quality construction of the sensor puts it in a class of its own”.
Underwater Acoustics International is a leading underwater services company, specializing in the inspection of penstocks, flooded conduits and tunnels. The company offer robotic systems equipment with best-in-class acoustic imaging systems that enable predictive maintenance.
Special thanks were given to ECHO81 – Impact Subsea’s distributor of products in the USA – who supplied the ISS360 sonar to UAI. For interested parties within the USA, ECHO81 are able to discuss all technical requirements, assist with integration and servicing, and provide demonstrations of the ISS360 sonar.
ISS360 Sonar: Click here.
Underwater Acoustics International: Click here.
ECHO81: Click here.
Article images are courtesy of Underwater Acoustics International.
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