Atteris initially considered a number of routes around BWI, then narrowed the route selection to the northern corridor illustrated above. A number of shore crossing options adjacent the LNG plant were then assessed and the optimum concepts defined – for a single cable an HDD was found to be the best value, but for multiple flowlines and cables a Microtunnel offered better value.
Atteris also considered the installation constraints for the concept and recommended an interface point at the north-east section of BWI where shallow water cable lay and pipe lay vessels would interface with larger & deeper draft vessels. Cost estimates for all concepts were compiled as input into Chevron’s decision analysis processes.
