Naval Facilities Engineering Command Contracts Office, Washington Navy Yard, 1435 Pendellton Avenue SE Suite 3000, Washington, DC 20374-5063

99 -- MARINE BARGE AND CRANE SUPPORT DUE 061500 POC Mr. Lonnie Winkleman (202) 433-5181, Mr. Bradford Wilson (202) 433-5314 E-MAIL: Click here to contact technical representative, WinklemanLG@nfesc.navy.mil. This is not a presolicitation notice pursuant to FAR Part 5, but is a market survey to identify sources that have experience in providing marine barge and crane support for ocean an near shore facilities. This notice does not constitute an Invitation for Bid or a Request for Proposal. It is not be construed as a commitment by the government to award a contract. The mission of the Magnetic Silencing Range in Norfolk, VA is to measure the magnetic signatures of U.S. Navy surface ships and submarines. Measurements are performed utilizing an underwater array of magnetometers located in the Hampton Roads entrance channel. The arrays were installed at three distinct depths to provide coverage for all classes of naval shipping. A linear array of twenty-one shallow magnetometers was installed at -30 feet MLW immediately east of the main access channel to range shallow draft vessels such as Mine Countermeasure ships and LCU's. A co-located linear array of thirty-one medium and twenty deep magnetometers was installed in the main shipping channel at depths of -55 feet and -85 feet, respectively, to range vessels from the FFG class up to the CVN class, including submarines. Each magnetometer was installed in a bottom-embedded fiberglass tube. The fiberglass tubes are protected by 5-foot diameter, 6-foot tall concrete cylinders. As a final protective measure, both arrays were subsequently covered with layers of pea gravel. The Norfolk Magnetic Silencing Facility is requesting Naval Facilities Engineering Service Center (NFESC) support in replacing nine inoperable magnetometers (two shallow, three medium, four deep). The following list presents the general tasks required to complete the repairs: The work barge is surveyed into a position over a specific magnetometer and placed in a four-point mooring. A steel cofferdam is lowered to the bottom, over the magnetometer location, to provide a current-free work area for the divers. Divers remove the layers of pea gravel and silt overlaying the protective concrete cylinder using either an air-lift or water-jet. Divers remove the access cover on the concrete cylinder and air-lift or water-jet the pea gravel from inside the cylinder, exposing the magnetometer tube and magnetometer cable service loop. Divers remove the magnetometer from the tube, uncoil the cable service loop, and bring the unit to the surface for replacement. Divers replace the magnetometer, re-coil the service loop, and replace the access cover. Layers of pea gravel are placed over the exposed concrete cylinder. The previous steps are repeated for the remaining eight magnetometer replacements. NFESC ECDET intends to conduct the repairs using elements of the Underwater Construction Team One for diving support and marine contractor services for barge and crane support. The marine contractor support will require the following elements: Work barge with appropriate tug/pusher boat assist. Barge mounted crane with a lifting capacity up to 20-tons. Ability to achieve and maintain station over individual magnetometers in a four-point mooring. The magnetometer locations will be provided by the government, in state-plane format. The contractor must provide a land surveyor for accurately determining the correct positioning of the barge. Ability to move out of moorings within one hour of notification, in the event large civilian or military vessels require passage through the channel. The work barge will become the primary staging area for all diving operations. Areas onboard the work barge will be required for staging and temporary storage of diving equipment. Contractor must have experience working with and supporting construction diving operations. Experience supporting diving operations that utilize large air-lifting and water-jetting equipment. Ability to accurately place a cylindrical steel cofferdam on the channel bottom to within one-foot of pre-designated locations. Ability to place layers of pea gravel over specific magnetometer locations upon completion of a repair cycle. Providing the pea gravel will be a requirement of the contractor. Experience with the installation or repair of shallow underwater ranges. It is anticipated that the repair work will be conducted this summer, most likely during the months of August or September. At least one small business marine contractor with sufficient qualifications is known to do business in the Norfolk area. An advertisement in the Commerce Business Daily seeking qualified sources for this repair is requested. If you are interested in this requirement and have demonstrated experience in the above areas, please submit your company information to the Naval Facilities Engineering Command Contracts Office, Code 81, 1435 10th Street, SE, Suite 3000, Bldg. 218, Washington Navy Yard, Washington, DC 20374-5063. To be considered for any subsequent competitive solicitation, your response to this notice must be received at the above address no later than June 15, 2000, 2:00 P.M. EST. Posted 05/15/00 (W-SN454823). (0136)

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