Projects
- Hartford Bridge Street Bridge Replacement
- Renewable Energy Project – Vermont National Guard 2.2MW Solar Project
- AllSun Solar Tracker Installations
- East Alburgh Bridge Swing Span Automation
- Whipline Gas Bore
- Gentes Road Bridge Rehabilitation
- CCTA Downtown Transit Center
- Ryegate Culvert Design-Build Replacement Project
- Pittsford Rail Bridge Rehab & Strengthening
- New Haven – Ferrisburg Trenchless Culvert Project
- Franklin County State Airport Expansion – 2024
- Renewable Energy Project – Rock of Ages 100kW Wind Turbine
- Lime Kiln Substation Retaining Wall
- North Hero-Grand Isle Draw Bridge Emergency Superstructure Repairs
- City of Burlington Municipal Paving Contract
- Interstate 91 Rutfill Project
- Pinkham Notch Conduit System
- Grade Crossing at Rte 142 Vernon
- Bellows Falls Tunnel Clearance Improvements
- Burlington Tunnel Emergency Repairs
- VELCO 115kV Underground Electric Transmission Line
- VELCO & GMP Lime Kiln Substations
- VTrans Intelligent Information System (ITS)
- Vermont State Archive Fire Water Storage System
East Alburgh Bridge Swing Span Automation
Youtube Video – http://www.youtube.com/watch?v=iZTYi5rOpB0&feature=youtu.be
The East Alburgh Swing Span is a 100-year-old movable bridge which as automated by ECI. The swing span is part of the East Alburgh Trestle, a 3,800-ft-long wood railroad trestle on Lake Champlain in northwestern, Vermont. Prior to automation in 2012, a bridge tender operated the bridge manually with a hand crank.
The swing span automation involved the controls and mechanical equipment so that the railroad dispatcher can open and close the swing span remotely from St. Albans, Vermont. The opening process requires the release of the miter rails, retraction of the support wedges, and rotation of the 102-ft-long steel thru-girder bridge. The closing process is just the opposite. The automation is a complex system of navigation warning lights, horns, marine vessel messages, video cameras, timers, relay switches, limit switches, actuating motors, turning motors, braking mechanisms, alignment devices, verification sensors, submarine cables, backup power with automatic transfer switches, and other components.
During the navigation season (May to November) the swing span will remain open for navigation (aligned with the navigation channel). The swing span will close (align with tracks) for train traffic and will return to the open position after a train passes. Outside of the navigation season, the swing span will remain aligned with the tracks and will be opened on an on-needed basis for boat traffic.
