Category Archives: Services

Completed Projects

Ensco 5000 Rig. Connect tow lines for tug.

  • Standby dive support on ballasting / de-ballasting.
  • CCTV Pontoon inspection on the harbour floor.
  • Detaching tug tow lines and bridal.

Fender Recovery

  • Search and retrieve fallen 8-ton fender from the bottom of the Couga harbour 21 meters deep.
  • Rig up fenders to the crane for removal.
  • Located and removed 25 fenders.

(Equipment used SSDE systems and 25ton crane.)

Hydraulic Fender Installation

  • Rig up fender brackets to the crane.
  • Position and fasten fender brackets to frame.
  • Inspect hydraulic fender pads.

Haw & Inglis 40 Ton Lead in Jetty Construction

  • Remove debris in path of piling machine.
  • Cut away and remove old Jetty in the path of piling machine.
  • Dredging to be able to cut old jetty off low enough to design level.

Couga Dam Job

  • Removing blanks in dam wall caisson at 45m, 30m, 18m and at 9 m.
  • Removing snorkel pipe from 45m with Tirfor.
  • Inserting bird cage strainer – outlet at 45m.

Sheet Piling

  • Repairing holes in sheet piling with sheet plate.
  • Identifying void cavities in quay-walls.
  • Breaking open of quay wall to expose cavities.
  • Filling of cavities with rock and concrete to restore structural stability to the quay wall.

NSRI

  • GPS positioning of 12 caissons with barge.
  • Dredging all 12 caisson down to design level. ¬†For example:
  1. Installation of reinforcing inside the caisson.
  2. Placing concrete beams across 12 caisson.
  3. Filling of 12 caisson with concrete using boom pump.

Boratz Salvage /Wreck Decontamination.

  • Locating the wreckage using side scan sonar.
  • Removal of all rope from the wreckage, which could pose as a shipping hazard.
  • Removal of line hauler winch. Cut free with a hydraulic grinder.
  • Removal of all oil drums and hazardous substances.
  • Drilling of holes into fuel tanks to remove 80 tons of diesel.
  • Complete decontamination of the wreck was successful.

Basil Read

  • Placing of Grade 1t2 rock for anti-scouring purposes.
  • CCTV surveys of breakwater, inspection of voids, 3 point.

Larianna Wreck Removal

  • Locate the position of wreckage using SSS.
  • Dredge mud out of wreckage holds with G” dredge.
  • Jet lifting straps under belly of the wreckage.
  • Using lifting bags and barge lifted vessel, tow to quay wall. Cut up vessel H/G.

Syncro #2 Salvage

  • Rig up lifting bags and barge crane to vessel.
  • Lift vessel to the surface.
  • Seal sea cocks of vessel.
  • Floated vessel by S pumping water out using 3 x 4″ trash pumps and one electric 6″ submersible.

Harbour Wall Surveys

  • CCTV surveys of Port Elizabeth’s harbour walls.
  • Inspect for block shifting.
  • Inspect for foundation undermining.
  • Inspect for any abnormalities, holes etc.

Transnet Slipway Downhaul Pulley Change out x 2

  • Locate downhaul pulley position.
  • Dredge through 6m of mud to expose pulley.
  • Remove the old pulley and install new designed pulley.
  • Feed through 340 meters of cable through the pulley and onto the cradle of slipway.

Bulk Carrier CCTV Surveys

  • CCTV GVI inspections.
  • Propeller shining (hydraulic prop shiner)
  • Cleaning of sea chests and overboard valves.
  • Wear down readings on propeller shaft and rudder.
  • Rope removal.
  • Blanking of sea chests and overboard valves.
  • Kettle patches.

Boat Salvage

  • Inspect vessel for rigging points.
  • Connect/ rig up lifting bags and steel lifting tanks to vessel.
  • Floated vessel.
  • Towed vessel to Transnet travel lift and removal.
  • Cut up and safely disposed of the vessel.

Cutting of Pylons H&I

  • Cut off and removed 40 steel pylons in the path of the fender construction.
  • Hydraulic grinder was used to cut pylons.
  • Full scale containerized dive systems were used.

Mossel Bay Slipway Structural Inspection

  • Core drilled concrete samples out of slipway pile structure. Sent to lab for MPA and chlorine testing.
  • Inspected pile structure for any damages or abnormalities.
  • Inspected steel rails for extreme wear down and abnormalities.
  • CCTV and still photograph survey on slipway structure, rails and pulley system.

Sandile Reservoir leak detection survey

  • Full SSDE CCTV dive unit.
  • Confined entry and exit.
  • Full CCTV survey of inside seams of reservoir.
  • Leak detected and fixed using underwater epoxy.

Shipping

  • GVI inspections
  • Full CCTV hull surveys.
  • Prop shaft and rudder shaft wear down readings.
  • Hull cleans.
  • Sea chest cleaning.
  • Overboard lake cleaning.
  • Remove rudder and pull propeller and shaft.
  • Rope removals.
  • Kettle patches installed.
  • Greasing variable pitch propellers.
  • Sea chest blanking.
  • Overboard valve blanking.
  • Stem tube sealing.
  • Propeller scraping and hydraulic polishing.
  • Trawling net removal.

Transnet Sand bypass System

  • Securing and maintaining of Transnet sand bypass caisson pump system in Couga harbour.
  • Removed 5m x 3m grid from aperture in caisson (removed by crane).
  • Serviced 3 pumps from inside the caisson.
  • Cleaned all marine growth within caisson.

 

CLEAN AIR STATION

At the CDC building in South End, Port Elizabeth we have a fully operational clean air station available 24 hrs/day.
We carry out Hydro-Static pressure testing on any pressure vessels.
Repairs to any pressure vessels, scuba equipment, surface supply equipment, including regulators, panels, umbilicals, Kirby-Morgan helmets and Drager breathing apparatus & all associated electronic equipment.
All repairs carried out by qualified dive systems technicians.

General Information

Our teams are well-organized and qualified professionals. We operate under the Occupational Health & Safety Act Regulations of 1993, as well as being affiliated with Transnet, SAMSA and the EC Disaster Management Committee.
We hold the licenses to dive in the Port of Port Elizabeth and the Port of Ngqura.
For more information & our latest projects see our Facebook page.
https://www.facebook.com/cdcdiving/
Contact Us:
Raymond Taylor (General Ops Manager) 0730546664
Jenny Burgess (SHEQ & Admin) 0827035573
Donovan Hewson (Dive Tech Services) 0810439856
Office: (041) 581 0092