Cummins-Powered Tender Serves Washington State's New Floating Bridge
When the world's largest vehicular floating bridge was completed recently at Seattle, a newly built, Cummins-powered vessel—Driftwood II—was on hand to begin serving as the concrete structure's tender.
Performing bridge maintenance, backup firefighting and environmental cleanup chores is a 46-foot, specially designed steel vessel powered by a pair of Cummins 6BT5.9- M marine diesels, each rated at 180 horsepower at 2,500 rpm. Each inline engine powers a 360-degreerotatable Schottel SPJ-55 pump-jet thruster mounted below the pilothouse.
In addition to the main engines, the Driftwood II is equipped with a Cummins 6B25.9-M diesel, rated at 115 horsepower at 2,500 rpm, for powering a 750-gallon-per-minute fire pump. The main engines are turbocharged and the fire pump engine is naturally aspirated.
The Driftwood II, owned and operated by the State of Washington Department of Transportation, not only is tending the new Interstate 90 floating bridge across Lake Washington but will be assigned to an older floating bridge that will reopen to traffic in 1992 after receiving major refurbishing. The new bridge will be for westbound traffic and the refurbished structure will be for eastbound traffic.
The two floating bridges are anchored alongside each other between Seattle and Mercer Island in Lake Washington.
Washington State's new bridge tender was designed by Columbia Sentinel Engineers Inc., Seattlebased naval architectural and marine engineering firm, and built by Fishermen's Boat Shop Inc. at Everett, Wash.
The 40-ton, blunt-bowed vessel, which has a top speed of about 8.5 knots, was equipped with Cummins 6B Series diesels because these engines have horsepower ratings that fit well with the rpm requirements of the pump jets and fire pump, reported Paul Zankich, Columbia Sentinel's principal naval architect.
"We looked at several manufacturers to see what they had available in that horsepower range," he said.
"We wanted preferably an American- made engine with good availability of parts and service. That particular (Cummins 6B Series) engine satisfied all of those conditions." Among the multipurpose vessel's bridge maintenance duties will be assisting with adjusting anchor cables, flushing bridge drains, maintaining navigation lights and doing other maintenance as needed. The vessel is equipped with a six-toncapacity, knuckle-boom hydaulic crane, pilothouse controls at stations both fore and aft inside the pilothouse and quick-disconnect connections for portable hydraulic and pneumatic tools.
For more information and free literature on Cummins engines, Circle 86 on Reader Service Card
Other stories from October 1989 issue
- HydroComp Offers New Ship Propulsion Design Software page: 6
- Rockwool Panel Systems Installed Aboard Fantasy —Literature Available page: 6
- Electrode Products Now Markets Full Range Of Metal-Coated Electrodes —Literature Available page: 8
- Seaworthy Systems Opens West Coast Branch Office In San Francisco Bay Area page: 8
- JJH Establishes Small Boat Engineering Department— J. Koelbel Named Director page: 9
- HHI Constructing Specialized RO/RO For United Baltic Corp. page: 9
- Astilleros Espanoles Delivers First Of Four Del Monte Reefers page: 11
- FISH EXPO '89 October 18-21, Seattle, Washington page: 12
- The Cost Of Lubricating Trunk Piston Engines page: 16
- IMODCO To Provide Petrobras With World's Deepest CALM Terminals page: 17
- EURO PORTt '89 page: 18
- Wartsila Diesel's Vasa 32 Sets A New Record: Passes The 1,000 Engine Milestone page: 20
- Marotta Scientific Controls Wins Aegis Shipbuilding Excellence Award page: 21
- William IN. Johnston, Former Head Of ABS page: 22
- McDermott Completes Deepest Pipelines In U.S. Waters page: 22
- Magnavox Multi-Channel Satcom For QE 2 page: 23
- Gladsky Marine Offers Large Crane Vessel For Lift Operations page: 24
- Hatch & Kirk Offers New Engine Parts For Older Diesels page: 24
- Gunter Waehling Named Henschel Vice President page: 25
- OSI Affiliated Companies Assume Management Of 2 U.S. Tug/Barge Vessels page: 25
- AT&T Radiotelephone Service Helps You Keep In Touch On The High Seas page: 26
- Jumbo Hopper Barge Launched By Jeffboat Is First Built Since Reopening For Construction page: 27
- COMPETITIVE YUGOSLAV SHIPYARDS AMONG THE WORLD'S LEADERS page: 28
- Consolidated Switchgear Established From Old 'Con-Select' Organization page: 31
- NAPVO Releases Safety Manual page: 32
- October '89/March '90 Liner Rates Announced By Military Sealift Command page: 32
- Renk Tacke Gear Units Chosen By German Navy For New F 123 Frigates page: 33
- $61,4-Million Contract Awarded Maersk Line By Military Sealift Command page: 33
- N e w Labor Agreement At MIL-Davie To Increase Shipyard Efficiency page: 36
- 'Speed Reducers And Your Bottom Line'—A N e w Free Brochure Offered By Falk page: 36
- Cummins-Powered Tender Serves Washington State's New Floating Bridge page: 37
- Lindenau Shipyard Delivers 12,100-DWT Chemical Tanker To West German Owners page: 38
- Third In New Series Of Navigational Satellites Launched Into Orbit page: 39
- Deck Machinery And Cargo-Handling Equipment page: 42
- Wilden Introduces Pumps Designed For Explosive, Hazardous Environments page: 48
- Furuno Introduces New Radar Lines—Opens East Coast Distribution Center page: 49
- Carnival's Newest Superliner, Luxurious 70,000-GRT Fantasy, Nears Completion At Wartsila Yard page: 49
- Halter Delivers Fourth Of Six Navy Ocean Surveillance Ships In Contract Valued At $85 Million page: 52
- $3.4 Million Awarded General Instrument For Spares/Support Equipment page: 53
- New Simple, Easy-To-Use Hydrostatics Program From Concurrent Systems page: 53
- Seatrade's Cruise Shipping '90 Conference & Exhibition Set For March 20-24 In Miami page: 56
- Blount Marine Launches First Dinner/Excursion Boat Of New Ultramodern Design page: 57
- Marco Completes Major Changes In Fishing Vessel 'Sea Wolf' page: 62
- Peterson Builders Realigns Management Staff page: 64