Removal of Old Granite Island Causeway Piles

July 14, 2022
Filed under: Coastal Engineering,Marine Structures — Magryn @ 3:04 pm

As the new causeway out to Granite Island at Victor Harbour is now completed, the old causeway needed to be disassembled and removed.

Ecospec Australia have been awarded the contract to disassemble and remove the old causeway. They are doing this using a spider crane on jack-up piles which rest on the seabed.

Magryn undertook a review of their methodology and the transfer of loads from the spider crane feet to a support frame to the jack up the piles, to enable EcoSpec to safely remove the causeway structure.

Drone for Underwater Surveys

July 1, 2022
Filed under: Marine Structures — Tags: — Magryn @ 11:08 am

Magryn now has an underwater drone to increase our ability to safely and inexpensively undertake underwater inspections of submerged structures such as jetties etc.

The drone is a Chasing Gladius Mini ROV which is a very capable remote control device, which can dive to 100m while recording 4K UHD video and/or photos

We have undertaken training for our senior engineers to operate and pilot the drone which can be utilised as another method of underwater inspection.

The use of the drone is much more economical than using a professional dive team to undertake underwater surveys.

The device specifications are:

  • 4K UHD camera, with LED lights
  • Portable backpack
  • Can dive to 100m depth
  • Highly controllable, with automatic depth holding and can tilt/lock at up to ±45°
  • Still photos or video recording ability
  • 5 thrusters (3 vertical & 2 horizontal)

West Lakes Pontoon

September 27, 2021
Filed under: Marine Structures — Tags: — Peter Cornish @ 9:41 am

Magryn provides engineering designs for floating pontoons for a range of manufacturers. The pontoon pictured is a small private pontoon in West Lakes, Adelaide. 

These are not for boat mooring as there are no private motorboats allowed on West Lakes, but are for launching and retrieving rowing sculls, kayaks, and swimming platforms etc.

Meningie Jetty, Vessel Mooring Facility

February 9, 2021
Filed under: Coastal Engineering,Marine Structures — Tags: , — Magryn @ 2:14 pm

​Magryn have been engaged by Coorong Council to review the design and installation of the piling and framing associated with the new vessel mooring facility located at the outer end of the main Meningie Jetty.

This facility is a fixed jetty (not floating pontoons) constructed of aluminium framing with fibreglass decking.

The facility is now complete.