A Guam Shipyard floating drydock sank after taking on water. The dock, known as Big Blue, is partially submerged after the incident on Monday. The US Coast Guard (USCG) said it received a call from the US naval base on the island in the early hours, saying the dock was sinking and was possibly on fire. Nobody was hurt, but a rescue boat reported debris in the water and what appeared to be floating fuel tanks. USCG has warned ships to be aware of a possible hazard to navigation.
Guam Shipyard has finalized plans to recover the floating dry dock Machinist, or Big Blue, which took on water and became partially submerged Jan. 3. The Coast Guard has established a unified command with Guam Environmental Protection Agency and Guam Shipyard to manage the recovery process. Coast Guard Sector Guam reviewed the shipyard’s plans, which outline the shipyard’s commitment to work with oil recovery contractor Gresco under the supervision of the Coast Guard and Guam EPA, to prevent pollution spills during salvage operations associated with the recovery.
“The primary concerns at this point are the safety of responders and mitigating the pollution threat,” said Capt. Thomas M. Sparks, commander of Sector Guam. “We are seeing cooperation between Guam Shipyard, Gresco, and Guam EPA in addressing these concerns.”
Company officials reported no signs of petroleum leaking from the dry dock’s oil tanks after a team of divers conducted a survey of the vessel, and floating boom was deployed around the vessel as a precaution in case of a pollutant release, Tuesday. It is estimated that a potential 83,000 gallons of wastewater, a mixture of oil or diesel with water, could be aboard Big Blue. However, soundings of the tanks are being conducted to ascertain the actual amount in each tank.
Salvage operations to remove all the wastewater from the vessel and re-float the dry dock are expected to proceed this week.
“Guam Shipyard is working with the U.S. Coast Guard to ensure that all the diesel and waste oil is safely removed prior to raising the dry dock Machinist,” said Mathews Poten, President and CEO of Guam Shipyard. “Guam Shipyard has all the assets required to transfer the diesel and waste oil thereby mitigating potential pollution.”
The cause of the incident is currently under investigation.