Project Tag: MV Prudhoe Bay (Seattle)

Marine Outfall ROV Inspection

The Brightwater Marine Outfall was constructed and deployed in 2008 and came online in September 2012. Shortly after leaving the shoreline near Point Wells, WA, the pipeline branches into two parallel 84” HDPE outfall pipelines; diffuser ports are located on the last 250 linear feet of each pipe along with steel access gate structures. Semi-annual …

ROV Assisted Derelict Fishing Net Removal

Over 5,600 derelict fishing nets had been removed from Puget Sound water by volunteer divers from depths up to 105 feet. Yet there remains many more in deeper water. Global Diving,working with Natural Resources Consultants for the Northwest Straits Foundation developed custom tooling and a ‘plan’ to remove the nets using a SAAB Cougar and Falcon ROV. First the ROV’s surveyed the nets,then a plan was developed,utilizing the tooling to gather and cut the nets free from the obstacles they snagged on. Once gathered and free,they were connected to the line from a vessel mounted crane. The balls of net were raised to the surface for proper disposal.

This pilot program was developed to test the feasibility and develop the tools and methods required for this removal.

Murph Navy Tug Derelict

Global was contracted by the Washington Department of Natural Resources  to remove Murph, a large steel-hulled 1944 Navy Tug from Quartermaster Harbor as part of the department’s Derelict Vessel Program. The 100-foot long, 200-ton tug had been abandoned and sank in shallow water near the mouth of the harbor in 2007, creating a navigational hazard. With the …

Des Moines Marina Fire Response

On June 23rd a vessel caught fire in the Des Moines Marina injuring two people. The fire spread quickly,destroying 6 boats and damaging several others. Quick action by the marina staff and fire department prevented further damage.

Global has been contracted to provide diving services as required to remove sunken boats and debris. Crew from our Environmental Response Division also cleaned areas of the boat house that were undamaged and removed sections of the dock and roof structure that had been destroyed by the fire.

F/V Deep Sea Removed from Penn Cove

The 140-foot F/V Deep Sea was moored illegally off of Whidbey Island in Penn Cove,a world renowned oyster and mussel rearing area. On May 12,2012 it caught fire and sank,at the time of sinking there was no idea of how much fuel was onboard. Estimates ranged from 100 to 5,000 gallons,with a know capacity of 30,000 gallons.

Divers responded to plug the vents and keep the oil from entering the environment and contaminating the over 2,000,000 pounds of mussels,clams,and oysters that are raised in the cove. Containment boom was deployed and the leaking oil was contained.

The Department of Ecology and the Coast Guard agreed that the wreck must be removed from this natural habitat. Global Diving & Salvage,Inc. was contracted to perform the removal operation.

Two derrick barges were brought in to perform the lift,once at the surface the F/V Deep Sea was pumped out and refloated.

Hydrogen Reactor Salvage

On December 9th,a 485 ton,140 foot long stainless steel reactor vessel rolled off a barge into approximately 60 feet of water off Cherry Point,WA. One end rested on the sea floor,with the other end,just breaking the surface. Immediately after the incident,Global provided an ROV to inspect the vessel for damage and asses its orientation on bottom. It was determined that there was no structural damage.

Global was contracted to develop,implement and manage the salvage. Over the next two weeks,working closely with the engineers and the owner,a detailed salvage plan was developed to safely lift the reactor from the water and deliver it back to the owner aboard a barge into cradles that were mounted to a transporter for offloading and movement to its final location. Two marine construction companies,General Construction and Manson Construction provided heavy lift derrick barges to lift the reactor and set it back onto the barge.

Divers were utilized to perform a thorough inspection of the structure as well as expose the lifting eye on the bottom edge of the vessel. When all of the plans had been approved and the required assets were in place,divers connected a 400 ton shackle to the lifting eye. The derrick barges,working in tandem at the direction of David DeVilbiss,Salvage Master for Global Diving & Salvage,Inc,lifted the reactor to the surface. It was raised out of the water,the barge positioned underneath and set into the cradles on the transporter.

The reactor is a integral piece of a refinery upgrade,assisting in the manufacture of low sulfur diesel fuel. The vessel was filled with nitrogen to prevent corrosion during transportation.

Boat Explosion Response

Global mobilized a rapid response team to the Jim Clark Marina Explosion after one of the resident boats blew up in the early hours of August 24th,2010. The exploding boat caused the complete destruction of it’s boat house and damaged three other boat houses including catching an adjoining boat and boat house on fire. Our crew’s initial response consisted of surveying the damage and deploying boom to prevent any debris or contamination from leaving the accident site. Global’s Dive Operations Mgr says “We were chosen as a full service emergency response provider due to our conveniently poised response equipment,our knowledgeable personnel,and our prior work experiences.”

Bottom Survey for Prototype Energy Project

Our work class ROV,the SAAB Seaeye Cougar,will be performing a video and acoustic survey of Admiralty Bay in preparation for a prototype kinetic hydro-power energy project. The survey goals include scouting an acceptable location for the turbine and a cable route to shore.

Hood Canal Bridge Replacement

We were contracted by Kiewit to provide diving and ROV services to route the 3-inch galvanized steel anchor wires through the new concrete anchor blocks that support the new east half of the bridge. The anchors are located in 60 to 380 feet of water. The new anchor wire was pulled through an anchor and connected to the bridge where the proper tension was achieved. Each leg of the two wires that attach to the anchor block has a tensile strength of over 1 million pounds. The anchors themselves weigh over 2 million pounds each. The project required the placement and connection of 20 anchors to secure the bridge in place.

Our divers connected the new anchor lines to the messenger lines that were in place and observed that the new wire,as it was pulled through,did not kink or get bound up. On the deeper anchors,the Cougar XT ROV was used. This vehicle,equipped with two five-function manipulators,was able to make the required connections and had enough power to stay on station during all but the heaviest currents.