Key Biscayne Master Plan 043944000.18w_Key_Biscayne_MP(forJooMag) | Page 126

VILLAGE OF KEY BISCAYNE UNDERGROUNDING OF UTILITIES — MASTER PLAN
directional boring. Combining this with the general desire to disturb as little
landscaping and private parking lots as possible, could create a situation
where directional boring becomes more technically feasible and the related
costs are less than or comparable to an open cut conduit installation.
To allow the contractor the greatest freedom to achieve the lowest cost
installation with the greatest schedule efficiency, the decision whether to
bore or trench will be left to the construction team.
12.7.4 Electrical and Communications Utility
Systems
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Underground electrical and communications facilities to be
constructed under this program are anticipated to be significantly
different from their overhead counterparts based on the nature
of an underground system design and layout. However, costs
related to “betterment” or system upgrades are assumed to be
the responsibility of the utility owner. For example, the existing
feeder ties would be replaced underground in-kind at a cost to the
Village. New feeder ties not currently in existence (that are intended
to enhance system reliability) could be installed at a cost to the
utility owner.
Electrical system costs may ultimately include a mix of “Vista” and
FPL standard switch gear should the Village desire to incorporate
“Vista” equipment in the system. This would provide improved
resiliency and storm surge protection since the Vista cabinet is
waterproof. This OPC considers that all the switchgear will be
standard style, with the option to upgrade to the Vista style cabinet.
“Like-for-Like” copper systems were considered in this OPC for
the undergrounding of telephone facilities. It is further understood
that AT&T may wish to upgrade to a fiber system after the initial
overhead to underground conversion is complete or in conjunction
with the program. AT&T stated they will install an upgraded fiber
optic network concurrently with the Village’s undergrounding
program only if the Village funds those upgrade costs. Therefore,
the upgrade has not been considered in the base OPC.
 “Like-for-Like” fiber/coaxial systems (FTTN) were considered in this
estimate for the undergrounding of cable television facilities.
 This OPC only considers the minimum number and size of
conduits required to implement the overhead to underground utility
conversion. Spare conduits have not been included in this OPC.
12.8 Opinion of Probable Cost Summary
A summary of total project costs, including contingency and inflation, is
provided below.
Village of Key Biscayne
Overall Program Opinion of Probable Cost Summary -
August 2018
Item
No.
Opinion of
Probable
Cost
Description
1 Overhead to Underground Conversion - FPL
$17,900,000
2 Utility Conversion Costs - ATT & Comcast $9,200,000
3 Impacted Street Light Replacement (Village Custom) $1,100,000
4 Restoration $6,000,000
5 Construction Management $3,800,000
6 Engineering/Permitting/Surveying $2,000,000
7 Construction Administration $1,800,000
8 Legal Fees/Easement Acquisition $500,000
9 Public Outreach $300,000
10 FPL Credit - 25% GAF Waiver
$(4,400,000)
11 Subtotal Undergrounding Project Costs $38,200,000
12 10% Contingency $3,800,000
13 Inflation $4,800,000
14 Total Undergrounding Project Costs $46,800,000
Opinions of Probable Construction Cost by project phase are provided
beginning on page 122.