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Manson Construction Aidod By Mobil In Coastal Pipolino Project Extending San Diego's Point Loma outfall pipeline—part of San Diego's Clean Water Program—was both a challenge and an opportu- nity to help ensure the integrity of California's coastline for Manson Construction & Engineering Com- pany. With help from Mobil Oil, Manson Construction and joint con- struction partner Morrison Knudsen Corp., completed the 18- month Point Loma Outfall Project without experiencing a single hy- draulic fluid-related delay or incur- ring one environmental spill fine. Today, the pipeline extends 12,500 feet (3,810 m) to a point on the ocean bottom nearly 4.5 miles (7.25 km) offshore and 325 feet (99 m) below the surface. The Point Loma Outfall pipeline, which carries treated effluent from the Point Loma Wastewater Treatment Plant, needed emergency repairs and a large extension to help protect California's delicate coastal marine habitat. To complete the job, Manson and Morrison Knudsen constructed two major pieces of hydraulically- operated underwater equipment: a "screed," which laid the gravel road- bed for the 12,500-foot pipe, and a "horse," which jointed two 73-ton pipe sections and carried them to the ocean bottom. All of the hydraulic systems involved in the construc- tion of the outfall pipeline were lu- bricated with Mobil EAL 224H, a new biodegradable and virtually nontoxic hydraulic fluid. "With so much of our work done either in or close to sensitive coastal waters, we aggressively pursue methods to eliminate both the po- tential for and the damage done by hydraulic fluid leaks and spills. Two of these methods involve increasing our preventive maintenance pro- gram and the converting of all of our hydraulic systems to Mobil EAL 224H," said Pat McGarry, Manson Construction's vice president of Operations. Mobil EAL 224H's vegetable base biodegradability is good news for the environment, as is EAL 224H's low toxicity. Mobil's environmentally-friendly hydraulic fluid passes the commonly accepted toxicity "Trout Test" at levels be- yond the current standard of ac- ceptability. Throughout the project, the U.S. Coast Guard closely moni- tored Manson Construction's Point Loma Outfall Project activities. The construction company reports that no environmental damage was caused by Mobil EAL 224H, nor were there any spill fines levied at any point. For more information on Mobil, Circle 114 on Reader Service Card DGM4 degaussing system was used on Intermarine's Osprey minehunter to achieve an extremely low magnetic signature. Intermarine's MHC 51 Minehunter Completes Magnetic Signature Trials In January, the USS Osprey (MHC 51) conducted magnetic sig- nature measurements at the naval base in Charleston where she con- tinues trials, and builder Intermarine USA announced that the stringent U.S. Navy contract requirements had been met. Mines are continually developed to greater levels of sensitivity, and many anti-ship mines use a ship's magnetic signature as a primary sensing device. Detection of a ship's signature can lead to detonation and the destruction of the ship. Intermarine USA's extensive use of non-magnetic materials in the Osprey is complemented by the DGM4 degaussing system designed and manufactured by Impianti Forniture Elettriche Navali (IFEN) of La Spezia, Italy. IFEN equip- ment was installed on the Italian Lerici, Malaysian Mahamiru and Nigerian Ohue class mine counter- measure vessels (MCMVs) also built by Intermarine at its shipyard in Italy. IFEN has since developed the multi-control, multi-channel DGM4. The system was required to un- dergo full First Article Testing in accordance with U.S. military speci- fications before installation onboard MHC 51, including high-impact shock, vibration and EMI/EMC. In addition to operational and envi- ronmental exposure testing, accel- erated life testing was conducted to confirm reliability. Intermarine says the DGM4 fea- tures modularity, interchangeabil- ity, reliability and maintainability. The system has magnetometer au- tomatic control and computer gen- eration in case of magnetometer fail- ure of the degaussing current-driv- ing signals. The DGM4 is a class standard on the MHC 51 ships, and is also installed on the eight Intermarine Gaeta class MCMVs nearing completion for the Italian Navy, as well as the Norwegian Oskoy class Surface Effect Minehunter/Sweepers. For more information on Intermarine USA, WE HAVE IT ALL! KNUCKLE BOOM - TELESCOPIC BOOM - FIXED LENGTH BOOM TECHCRANE international, inc. Authorized nationwide factory representative for: HEILA (knuckle boom) marine cranes ISO 9000 ABS-LLOYDS-DNV • RINA-BUREAU VERITAS-USCG EBI marine cranes One of the safest cranes available API-ABS-USCG-LLOYDS-BUREAU VERITAS TECHCRANE International, Inc. 61130 Timberbend Drive, Lacombe, LA 70445 TEL: (504) 882-3200 • FAX: (504) 882-3322 Circle 287 on Reader Service Card Circle 299 on Reader Service Card Circle 8 on Reader Service Card 60 Maritime Reporter/Engineering News Postal address: P.O. box 29102. 3001 GO Rotterdam/Holland, Main office: 45, Stationsplein, Phone (0)10-4331277, Fax (0)10-4130304, Telex 22496 FROM STOCK: • anchors if lp s' f? y ji • chains leboats ckmachinery ssori
