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99 -- BARGE AND CRANE SUPPORT FOR MAGNETIC SILENCING RANGE REPAIR AT NORFOLK, VA SOL N47408-00-Q-1601 DUE 072800 POC Margaret Sundberg, Contract Specialist (202) 433-5315, Rita Palmore, Contracting Officer (202) 433-5313 WEB: Copy of RFQ, http://esol.navfac.navy.mil. E-MAIL: Contract Specialist, sundbergmc@nfesc.navy.mil. The CBD notice of July 17, 2000 is hereby amended as follows: The project description (Scope of Work) in Item 17 is removed and replaced with the following: 4.0 Scope of Work: This contract will require barge and crane support to the project for a period of seven (7) 10-hour workdays. In addition to supporting the magnetometer replacement, the contractor will be required to place two (2) government supplied spar buoys, one at each end of the shallow array. The buoy anchors will consist of one 500-pound concrete clump for each buoy. The coordinates for the spar buoys will be provided by the government. A U.S. Navy dive team consisting of approximately 15 personnel will perform the diving operations, including final inspection of the spar buoys to verify buoy counter weights are functioning properly. The contractor will be required to provide the following equipment, material and capabilities: 1. Work barge equipped with crane with a lifting capacity of not less than 20 tons. 2. Tug or pusher-boat assist to the barge. 3. Personnel to operate the barge, crane, and tug/pusher boat. At a minimum this should consist of a barge foreman, crane operator, tug/pusher boat operator, and two riggers. Members of the U.S. Navy dive team are rigger qualified and will be available to assist with barge operations. 4. Ability to maintain station in either a four-point mooring or spuds or a combination of both. 5. Provide an area of approximately 1600 square feet on the barge for U.S. Navy diver equipment. The equipment will consist of a surface supplied dive station, air compressor and flasks, hyperbaric chamber, and equipment container. 6. Provide a cofferdam that will allow for a current free work environment for the divers.  Cofferdam dimensions should be approximately 20 feet in diameter, 8 feet in height, with a wall thickness of not less than 3/8 inches (see enclosure 1). A modified steel tank with similar dimensions is suitable for this purpose. The contractor will provide the cofferdam with appropriate lifting points that will not impede the divers descent, ascent, or bottom time. 7. Ability to safely place the cofferdam on the channel bottom at specified locations provided by the Government. The U.S. Navy dive team will provide DGPS positioning for the project. 8. 400 cubic yards of pea gravel. 9. Ability to place specific quantities of pea gravel on the channel bottom within a 20 foot diameter circle. 10. Ability to remove all equipment from the channel bottom and move the barge out of the channel with one hour's notice. This requirement is in anticipation of vessel traffic requiring use of the channel in the area replacement work is being performed. 11. Ability to accurately place spar buoy anchors at predetermined coordinates. The contractor may moor the barge during non-working hours in the vicinity of the Data Concentrator Shed (see enclosure 2). Mooring the barge in this location will require the use of navigation lights on each of the four corners of the barge. The barge foreman and the U.S. Navy dive supervisor will work together to insure proper coordination of barge and diving operations. The contractor will make the barge available to the government for inspection at least 1 week prior to commencement of the work. Posted 07/18/00 (W-SN476154). (0200)

Loren Data Corp. http://www.ld.com (SYN# 0344 20000720\99-0001.SOL)

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