Page 58: of Maritime Reporter Magazine (May 1994)

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