Type: Waterfront / Wharf Improvements

Size: 11.5 Acres

Our work on this project included wharf strengthening, concrete utility trenches, partial replacement of the bilge oily water treatment system (BOWTS), removal of deficient and deteriorated water distribution system, installation of new ship connection risers and fire hydrants, and new foam filled fenders for ship berthing at Uniform and Tango Wharves on Naval Base Guam. Design-bid-build work (Part A) included strengthening Uniform Wharf (42 m x 384.4 m) and a portion of Tango Wharf (25 m x 190 m) by installing new king pile/sheet pile bulkhead wall, anchor wall and tieback system, concrete pile cap, stone column soil improvements, storm bollards, mooring hardware, and new foam filled fenders for ship berthing and the demolition of the small boat mooring facility. Design-build work (Part B) included the following work for both Uniform and Tango Wharves: concrete utility trenches, partial replacement of BOWTS, removal of deficient and deteriorated water distribution system, installation of new ship connection risers and fire hydrants, concrete paving of the entire wharf deck with storm drain and water quality treatment systems, installation of two new power mounds, infrastructure for telecom system and future power on Tango Wharf, and a cathodic protection system. Part B work also included strengthening Tango Wharf (25 m x 175 m) by installing new king pile/sheet pile bulkhead wall, anchor wall and tie-back system, concrete pile cap, stone column soil improvements, and mooring hardware. For the entire job, 24,600 CY was placed including the PCC and also the bulkhead wall and anchor wall.

Total quantities are as follows: 1, 700 metric tons of reinforcing; 46,000 CY of Concrete; 4,800 Stone Columns; 791 H-Piles; 811 King/Tophat Piles.

Utilities distributions systems encompassed the following:

Water System: 8” DI Flanged Pipe–2200 LF, 8”-12” C900 Pipe-1663 LF, Fire Hydrants-11 ea., Water Risers–8 ea.; Sewer System w/leak detection:  4”x8” Double walled HDPE pipe –2240 LF, Sewer Risers –11 ea.; Bilge Oily Waste System w/leak detection: 4”x8” Double walled HDPE pipe –1100 LF, BOW Risers –3 ea.; Telecommunications:  Underground ductwork–8000 LF, Precast Manholes – 11 ea., SS telecom enclosures–5 ea.; Electrical System:  Underground ductwork–17,000 LF, Precast Manholes– 10 ea., SS 480V power mounds–2 ea.; Cathodic Protection System: 100’ Deep anode wells–12 ea., AC-DC rectifiers–4 ea., Galvanic sacrificial anodes–125 ea.; Drainage System: Precast Manhole – 55 ea., Cast in place slotted trench drain–3,600 LF, Water Quality Units–22 ea. PCC Paving -15-inch thick:  Area: 223,000 SF /  Volume: 10,324 CY, 7-inch thick:  Area: 95,000 SF / Volume: 2,050 CY

Awards

– 2015 Alliant Build America Award, Federal and Heavy New, Associated General Contractors (AGC) of America