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Crawler exiting lower outlet pipe with laser target.

Several lower outlets in small retention dams high in the Sierra mountains required assessment. Hibbard Inshore flew the ROV and dive equipment to the area by helicopter. A diver burned open the trash rack and inserted the crawler. The crawler inspected several of the steel lower outlets while flooded visually and with a UT gauge. The crawler also inspected one of the dry outlets visually and measured the alignment using a pipe laser and a target on the crawler. The alignment was performed to determine if the pipe could be lined.

Video of a Crawler with Laser.