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Repair Hydraulic Cylinders and Position Indicators at Colebrook River Lake, Connecticut for the USACE - January 2020

Project Summary: Marine Diving Solutions provided the removal of 6 hydraulic cylinders, repairs, and re-installation for the USACE. Additional services included oil testing and filtration.

Services Included:

ROV inspection underwater

Bulkhead installation and removal

Removal and reinstallation of six flanged gate cylinders

- 200' vertical lift from gate chamber to bridge deck.

- Required to be disassembled prior to lifting.

- 26.5' OD cylinder barrel, 113'long, appx. 5000 lbs each

- 15' long, 5' cylinder ram, appx. 1000 lbs each

- All pipe barrels and cylinder rams had to be rotated from vertical to horizontal after lifting, for removal

Oil filtration and testing

Working in suspended and fall restriction area

Modifications including fabrication and welding to the hydraulic operating system piping. Approximately 100' of 1.25' Sched 80 pipe.