The Port Authority of Allegheny County, Pittsburg, Pennsylvania, is very pleased with its Berry Street Tunnel reconstruction results. The authority benefited from the contractors original low bid and its post-bid tunnel-design change. The original bid was almost US$ 3 million lower than the nearest competitor, a fair proportion for a project costing under US$ 40 million.However, that was only the start of the savings to come. The contractor, Mosites Construction Company of Pittsburgh, PA proposed a tunnel-design change to the authority immediately after being awarded the contract. This was contingent on the valued engineered idea, whereby owner and contractor share any project cost reduction.