This project involved providing a conceptual estimate for a 591’ long pedestrian bridge across the Peconic River in Riverhead, NY. The bridge consists of concrete pillars in and out of water, structural steel framing, concrete bridge deck, steel railings, wooden benches, and LED lighting.
A new 70-foot-high pedestrian bridge stretches across the highway to connect Purchase Street with the new MBTA station next to the Whale’s Tooth parking lot. A new elevator banks at the parking lot provide ADA access to the bridge. The 240-foot single span features a tied arch bridge which spans between two piers.
Some elements of the bridge reflect New Bedford’s nautical legacy. Local artists contributed boat designs on the glass enclosing the elevators. On Purchase Street, the western side of the bridge opens into a landscaped plaza with steps, ramps, and planters. Ellana prepared cost estimates for this public transportation project.
NJ TRANSIT and Amtrak are replacing the century-old Portal Bridge over the Hackensack River in New Jersey with a higher bridge that will not open and close to river traffic.
The existing Portal Bridge opened in 1910. The structure carries Amtrak and NJ TRANSIT passengers over the Hackensack River — a critical link in the congested territory between Newark, NJ and New York Penn Station. The two-track, movable span is a major bottleneck and source of delay, particularly when the aging bridge malfunctions during opening and closing for maritime traffic.
The two-track replacement bridge called Portal North is a modern, high-level fixed span that does not open or close, eliminating the movable components and risk of malfunction. The new 50,000 SF bridge will rise more than 50 feet over the river and, including the approaches, span nearly 2.5 miles of the Northeast Corridor railway. Portal North Bridge is an important element of the broader Gateway Program to double rail capacity between Newark and New York.
Night and weekend work is the only option to do the construction work, which complicated the estimate along with maintaining the railway’s activity while removing major elements.
Nassau Insurance’s headquarters at One American Row in Hartford is known locally as the Boat Building. This iconic 24-story tower was built in the mid-1960s and remains a focal point of Hartford’s skyline. On level 4, there is an entrance to the building’s pedestrian bridge that connects to Constitution Plaza and a river walking path which is part of Hartford’s Riverfront Recapture.
This existing pedestrian bridge along with the stairs will be demolished and replaced.
Ellana served as cost estimator for this project. Our estimate included pricing for bridge pier cladding, rainscreens, aluminum composite panels, concrete, aluminum wire mesh railings, lighting, and landscaping elements.
Ellana provided cost estimates for ROM comparative cost evaluations of five fender protective options at the Bronx-Whitestone Bridge and one option at the Throgs Neck Bridge. At the Bronx-Whitestone Bridge these options included Cofferdam Option, Pile Supported Dolphin Option, Sheet Pile Dolphin Option, Rock Island Option and Sacrificial Bollard Pile Option. At the Throgs Neck Bridge we estimated the cost of the removal of the existing fender system and its replacement with the Concrete Strut and Perimeter Pile Cap fender system.
Bronx, NY
Ellana provided cost estimates for the installation of a fixed-barrier system to increase safety, thwart acts of natural and manmade disasters or accidental collisions to the tower legs. The fixed barrier system stops a boats progress in seconds, and is capable of stopping a second or even a third swarm attack, should it occur. The barrier system required the installation of marine-driven piles to support the steel fence’s required collision-counteraction force. The project included installation of a fire standpipe at each tower that required night work and phased construction.
Royalston, MA
Ellana provides existing condition analysis and cost analysis for the repair, restoration, and improvement of the Kings Street over Millers River Bridge. The bridge is located in the Town of Royalston, MA, and has an approximate span of 100’L x 50’W. The scope of work includes entrance construction, debris removal, bridge deck replacement, concrete repairs, bridge superstructure repairs, new paint on exposed surfaces, new PV solar-powered walkway and pathway lighting, related earthwork, exterior improvements, and culvert repairs.
Cost estimating for the replacement of a monolithic concrete overfill surface course with a new overlay on the upper level, between Bent No. 7 and Bent No. 72 of the Henry Hudson Bridge. The team estimated seven overlay alternatives, each with two different demolition options – 14 estimates total and 14 life-cycle analysis cases. Ellana also developed a construction schedule for each of the design alternates.
The seven design alternates were split between two demolition options including a milling demolition of existing overlay and a hydro demolition of existing overlay. Each option evaluated:
Rosphalt Polymer Modified Asphalt one with and one without Waterproofing Membrane
Polyester Polymer Concrete (PPC)
Microsilica Concrete
Epoxy Asphalt Concrete
Conventional Hot Mix Asphalt (Superpave HMA) with and without Waterproofing Membrane
The estimate considered the nature of rehabilitation work and its restrictions, particularly for a toll agency such as the TBTA, which requires work performance with minimal interruption of traffic and providing cost-effective, maintenance-free, and durable solutions. The phased construction occurred in three segments of roadway starting from the two outermost lanes and then replacement of the middle lanes.
The project covered 94,000 square feet of deck replacement.
