EcoElectric LNG

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Location: Peñuelas, Puerto Rico
Owner: LNG Import Facility
Completion Date: January 1, 1999
Categories: Construction, LNG, Liquids & Petrochemical Terminals
This EPC project comprised the marine civil work for an LNG import facility built to supply a new cogeneration plant and to berth LNG ships from 15,000 M³ to 137,000 M³ with a design draft of 37’. The double-deck unloading platform is 100’ x 40’ located in 45’ of water. Steel monopiles 96” in diameter and up to 180’ long were used for the breasting (5 each) and mooring (4 each) dolphins to accommodate the wide range of tanker sizes. The 1,750’ long by 30’ wide access trestle is designed as an H-20 roadway and pipeway with LNG containment for extreme emergency spills. It also carries the cooling water piping for the cogeneration plant. There are a total of 100 ea. 54" diameter prestressed concrete cylinder piles supporting the trestle and unloading platform. The first 600' of the trestle was constructed using an “over the top” technique due to the environmentally sensitive nature of the area. The trestle and dock superstructure maximized the use of precast concrete elements which were fabricated on the East Coast and barged to the jobsite by Weeks’ fleet of ocean going tugs and barges. The precast elements and monopiles both optimized the capabilities of the Weeks 526, a 350-ton heavy lift derrick barge.