February 10, 2009
The National Constructors Group, working with preliminary plans and quantities supplied by the Knik Arm Bridge and Toll Authority (KABATA), independently developed the estimate based on procedures used in preparing 'hard money' competitive bids.
The project, extending from the north end of the C Street viaduct to the intersection of Point MacKenzie Road and Knik Goose Bay Road, was studied in three segments. The west side roads, the east side roads, and the bridge were examined independently. The base case, a two lane facility, was estimated to cost $686 million; $99 million for the west roads, $214 million for the east roads, and $373 million for the bridge. These numbers represent what a contractor would bid but don't include monies typically associated with construction oversight and/changed conditions such as an owner's oversight which could run 5-to-10 percent of the cost. Changed conditions may include right of way and utility documents, permits and local government concurrence as an example.
"While the total of $686 million compares closely with the recent update of costs released by KABATA, there are still costs associated with final design, permitting, and other unknowns that may impact the overall cost of this project" said Frank Richards, Deputy Commissioner of Highways and Public Facilities, DOT&PF.
Also included in the independent estimate are values for expanding/building a four lane facility. Not included are costs associated with connecting the crossing to the Ingra/Gambell couplet. Although an estimate of cost of the couplet is possible in the future, preliminary plans and quantities were not available for this review.
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