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HomeMy WebLinkAboutMore about Cost EstimatingMore about Cost Estimating Before the start of the design process in March 2009, an independent construction estimator, C.P. O'Halloran Associates, Inc., prepared a Preliminary Concept Cost Estimate. The estimated cost of construction at that time was $107,633,286 without contingencies. With the addition of estimated design, project management, environmental documentation, ancillary costs including furniture, the preliminary budget was $140 million. During the subsequent design process, the design team, staff, and the Building Committee meet regularly to guide the project. A significant part of those periodic meetings was exploring ways to reduce potential costs through value engineering and phasing. At the November 10, 2009 Council meeting, staff shared the current costs. At that meeting staff shared the possible scenarios from conservative to very optimistic. The very optimistic estimates envisioned: being able to sell or give away the dirt from the excavation at a savings of $4 million; an additional 10% reduction for a better bid environment of $9 million; additional value engineering at $5 million; and phasing the bridge and North Park parcels for a later project at $7 million. Additional cost estimates were run at each stage of the project design. At the conclusion of the Design Development phase, April 2010, another estimate by the same firm showed the construction cost to be $102,779,710. Another estimate in October 2010 by C. P. O'Halloran showed the cost to be $103,816,895. C.W. Driver also ran an independent estimate in October 2010 and their projected cost was $106,796,863. Despite our wishful thinking, the final bid totaled $106,504,125 which was very close to the preliminary estimate in 2009.