Key Biscayne Master Plan 043944000.18w_Key_Biscayne_MP(forJooMag) | Page 136

VILLAGE OF KEY BISCAYNE UNDERGROUNDING OF UTILITIES — MASTER PLAN
12.8.1 “Vista” Style Switch Cabinets
As described in Chapter 5, two types of switch cabinets can be provided
by FPL based on preference or circumstance: 1) the standard “PME”
switch cabinet or 2) the “Vista” switch cabinet. The Vista cabinet has
a slightly smaller footprint, is shorter, and only requires an eight-foot
clearance on one side of the cabinet rather than all sides for the standard
switch. The Vista cabinet is also hermetically sealed to prevent water
intrusion. The Vista switch cabinet costs approximately $60,000 more than
a standard switch cabinet. Forty-one aerial switches exist in the current
overhead system. FPL has indicated the underground system would not
need as many switches as the aerial system. Since we cannot confirm how
many will be required, we assumed the underground system would need
40 switch cabinets, one less than what exists today. This line item also
includes FPL’s GAF Waiver discount of 25%.
12.8.2 Additional Street Lights
As described in Chapter 5, it is estimated 118 street lights will be
impacted by this program and will need to be replaced. Forty street
lights are currently being installed by the Village as part of their separate
lighting program. It is also estimated a minimum of 41 street lights would
be required in Village areas currently without lighting. Kimley-Horn has
included in our OPC these additional street lights, assuming the Village
elects to install the minimum number identified. A photometric plan may be
required and may increase that number significantly.
12.8.3 Extra Conduit for Future Utility
This OPC includes costs associated with the installation of spare conduit
infrastructure for a Fiber to the Premises (FTTP) Broadband Network
that could be used by competitor communication providers interested in
providing service to the community. As described in the separate Technical
Memo dated June 20, 2018, this includes the installation of conduit to
all parcels in the Village. Conduit lengths were estimated using the total
length of public roadway for each phase of the undergrounding project.
This OPC does not include fiber optic cable or equipment, nor does it
include the drop conduit between the right-of-way and the service point of
the building/facility to be served. Additionally, assumptions identified in the
Technical Memo were maintained with exception of the contingency, which
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was removed, and general conditions, which were further refined to reflect
real-world market conditions.
12.8.4 Roadway Improvements
The Village UUTF requested Kimley-Horn investigate the feasibility
of raising public roadways to mitigate future effects of sea level rise.
Although this master plan does not contemplate the effects of sea level
rise nor sustainability, Kimley-Horn performed a brief analysis of the costs
associated with such an endeavor. This analysis assumed roads would
consistently be raised by six inches only in the areas where stormwater
improvements are proposed in the Village’s stormwater master plan. This
Opinion also assumes by raising the roadways, additional concrete gutter,
stormwater infrastructure, and design fees would be required.
In addition to raising the roads, traffic calming is an important part of the
Village’s 2008 master plan. It identified the need for traffic speed control
on the roads within the Village. To address this issue the Village engaged
a consultant to prepare a Traffic Calming Master Plan in 2012. This master
plan identified nine roadways that warranted traffic calming measures,
assigned an improvement cost to them, and included the cost in this OPC
without consideration for inflation.
12.8.5 Water Main Replacement
Provided with the GIS data from Miami-Dade County was information
related to the material type of individual segments of the water main
system. Kimley-Horn was able to isolate and identify the existing asbestos
cement (AC) water main that exists as part of the County’s overall system
within the Village. The Village staff has expressed interest in replacing all
existing AC water main pipe. This line item cost includes current real-world
material and installation costs for 1,257 LF of 12" or greater AC water
main, 5,755 LF of AC water main less than 12", and 18,354 LF of listed
“Unknown” water main less than 12" that will need to be identified before
determining whether it would need to be replaced. Not all Unknown water
mains may need to be replaced if they are determined to be made of an
acceptable material. The County has indicated that they would be willing to
include these upgrades in their budget estimates to reimburse the Village
for the work.