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Basis of Design Book 2 - City of St. Petersburg

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Memorandum<br />

March 1, 2010<br />

Page 6 <strong>of</strong> 6<br />

Table: Order <strong>of</strong> Magnitude Opinion <strong>of</strong> Probable Cost<br />

Pier Demolition<br />

Order <strong>of</strong> Magnitude Cost<br />

(per square foot)<br />

Pier Demolition – Open Pier Area (including piles) $50<br />

Pier Demolition – Limited Access Area (not including piles) $70<br />

Building Foundation Demolition<br />

Order <strong>of</strong> Magnitude Cost<br />

Building Foundation Demolition (x5 structures)<br />

$2,400,000 total<br />

Replacement (structure only)<br />

Order <strong>of</strong> Magnitude Cost<br />

(per square foot)<br />

Pier Replacement – Open Pier (50-year design life) $210<br />

Pier Replacement – Limited Access Area (30-year design life) $750<br />

Pier Replacement – Limited Access Area (15-year design life) $500<br />

Reuse <strong>of</strong> the existing foundations, building and piles not only has a higher initial cost but will have a<br />

higher annual cost for inspection and maintenance. Underwater inspection <strong>of</strong> the jacketed piles would<br />

need to be performed on a bi-annual basis as compared to a new structure which will not require<br />

underwater inspection for approximately 10 years. All <strong>of</strong> these additional costs are not reflected in<br />

our estimate but should be considered during evaluation <strong>of</strong> the alternative pier configurations.

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