1.03 SOW_GFI_SALVAGE_CONOP_V2.pptx
PPTX presentation 1 MB Posted
- Solicitation number
- N6817126QT024
About this file
This file is a Statement of Work (SOW) and Concept of Operations (CONOP) presentation for the salvage of a Navy Standard Intermediate Causeway Side-Loadable Warping Tug (SLWT) that partially sank at Naval Station Rota, Spain on 24 May due to heavy Levante winds and multiple breaches in port aft ballast tanks. The salvage target is a barge measuring 80 feet long, 32 feet wide, and 8 feet deep, with a dry weight of 142,500 pounds comprised of three center modules and six end rake modules, plus a pilot house. The barge contains 42 total ballast tanks (36 full-sized at 150 cubic feet each and 6 half-sized at 75 cubic feet each) with total buoyancy of 393,120 pounds. The vessel is currently approximately 50% submerged in approximately 35 feet of sand/silt bottom with 10-15 feet visibility, with observed damage including large damage (2-4 square feet) on top and side of one ballast and smaller cracks and holes in several other ballasts.
The salvage concept requires execution of a tandem crane lift to extract the barge from the water and sling it onto Pier 4, with an estimated total lift weight of 165,000 pounds (80 tons or 40 tons per crane) accounting for the dry weight plus residual water in ballasts and pilot house. The operation includes dewatering the vessel, utilizing two 40-ton cranes with specialized 30-ton slings basketed to a 75-ton shackle at designated pick points, pulling the barge from the pier during dewatering with a tug, and subsequently disassembling modules on the pier for transport to disposal areas by paint barge. The Government is soliciting quotes from Local Sources Only for certified heavy lift crane operators, specialized rigging equipment, and related rental services necessary to execute this tandem lift extraction.
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Text version
Navy Standard Intermediate Causeway Salvage CONOP
Overall Classification: UNCLASSIFIED
30JUN26
Orientation
Where: NAVSTA Rota, Pier 4
What: Salvage target is a Navy Standard intermediate cause way Situation: On 24 May the Naval Station Rota Port Operations side-loading warping tug (SLWT) took on water due to heavy Levante winds and partially sunk at pier 4. The SLWT is currently secured to the end of pier 4, with the aft end of the SLWT underwater and likely resting on the seafloor. U.S. Navy divers from the Forward Deployed Regional Maintenance Center (FDRMC) inspected the SLWT on 29 May and discovered multiple breaches in the port aft end ballast tanks, which is suspected to be the primary cause of the craft sinking.
UNCLASSIFIED
Orientation (cont.)
Barge dimensions: The causeway is made up of three center modules (non-powered) and six end rake modules. The center module is 8 ft wide and 40 ft long. Each end rake is 8 ft wide and 20 ft long. It also has a pilot house as well that is expected to be flooded.
Long: 80LF Wide: 32LF Deep: 8LF
Dry weight of barge: 142,500 lbs
# of ballasts: 39x separate watertight ballasts & 6x ½ sized ballasts = 42 total ballasts Full sized module ballast: 5’x5’x6’ = 150 cubic feet 9,360 lbs of displacement Half sized ballast (1/2) 5’x5’x6’ = 75 cubic feet 4,680 lbs of displacement
Barge Total Buoyancy = 393,120 lbf
Water depth: ~35fsw
Bottom Type: Sand/silt
Visibility: 10-15 feet
Hard bottom ~35fsw
Submerged ~50% submerged Dry 80’ 32’ ~50% dry
Barge (current)
Motor waterline
Legend:
Unsubmerged ballasts Unsubmerged ballasts (observed damage) submerged ballasts (no observed damage) submerged ballasts (observed damage)
Large damage on top and side of ballast (2-4 ft^2) Small crack/hole in corner less than square foot Small crack/hole in corner less than square foot Small hole/deterioration (heavy growth) Small hole/deterioration (heavy growth)
* There is likely more non observed damage not on the bottom of the barge
Concept of Salvage (cont.)
(6) Sling and lift onto pier 4 Crane weight (dry) 145K + inevitable water in the ballasts and pilot house 20K = 165K lbs or 80 tons (40 ton per crane)
(7) Disassemble modules on the pier Modules loaded onto truck after dismantled.
Taken to the disposal area by Paint barge.
Crane pick points (40ton)
Tug to pull barge from pier during dewatering Crane pick points (40ton) X2 30 ton slings basketed to 75ton shackle
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File details come from the government source that posted it. Updated .