FIRST-EVER USE OF SIMULATION TECHNOLOGY HELPS GUIDE OHIO RIVER BRIDGES PROJECT DESIGN TEAMS
April 2006 -- River barge pilots learned recently what it’s like to maneuver with two new bridges spanning the Ohio River at Louisville. The Seamen’s Church Institute (SCI) conducted computer simulations based on three of the six alternatives proposed for both the Downtown and East End Bridges. The simulations, generated by a technology never before used for bridge projects in Kentucky or Indiana, were run by professional pilots April 24-28 at SCI’s Paducah facility.
SCI uses life-size pilot wheelhouses and sophisticated computer software and imagery to produce a simulated river environment. Computer programs were created using information - such as pier arrangements – for all six bridge alternatives (three for each bridge location).
The pilots offered feedback and advice about the alternatives based on their experiences in the simulator. The information gathered will be provided to the Coast Guard and to the bridge design teams.
“It’s a tremendously helpful technology because it duplicates what it’s like to approach and steer between the bridge piers of a bridge,” said Bart Bryant, the Kentucky Transportation Cabinet’s acting project manager for the Ohio River Bridges Project. “The simulations can be set using various conditions, such as high winds, different flow conditions, daylight or at night, approaching from down- or up-river, and so forth. Barge captains have to prepare for many factors as they approach a bridge structure, such as strength of current and turning angle -- this technology illustrates, in very lifelike circumstances, what pilots would face as they approach the proposed bridges.”
Each simulation exercise took 30 minutes, and both of SCI’s “virtual” wheelhouses were used. Representatives from the Coast Guard were on hand to monitor responses in the exercises.
The Coast Guard, which has oversight responsibility concerning pier placement and configuration, has approved the span widths of the main navigational channels. However, the simulations may show that changes are needed in the shape or design of bridge piers, which could affect sightlines at river-level. SCI will make its final summary of comments by the river boat pilots by June 1.
Founded in 1834, the Seamen’s Church Institute is a voluntary, ecumenical agency affiliated with the Episcopal Church. The Institute promotes safety, dignity, and improved working and living conditions for all mariners and seafarers.
Seamen’s Church Institute provides practical and relevant training aimed specifically to deep-sea, coastal, and inland mariners. Instructors use the Institute’s computer-based simulation system to improve mariners’ navigational and bridge-management skills in a risk-free environment. Consistent and regular training creates a safer workplace and a greater awareness of America’s waterway system. For more information, visit the SCI Web site at http://www.seamenschurch.org/CME/cmefront.htm.