Key Biscayne Master Plan 043944000.18w_Key_Biscayne_MP(forJooMag) | Page 32

VILLAGE OF KEY BISCAYNE UNDERGROUNDING OF UTILITIES — MASTER PLAN
The capital improvements projects (CIP) projects are funded through
general funds incorporated into the annual budget. The recreational
projects including field improvements and sports lighting will move forward
independently of the Village’s proposed utility undergrounding plan. Street
light improvements are ongoing but a large portion of the existing lighting
will be affected by the undergrounding and will be incorporated into the
undergrounding project. Roadway improvements include traffic calming
measures and sidewalks may also be included in the undergrounding
program.
In recent years the Village hired a consultant to prepare a master plan
for the implementation of the Village’s drainage improvements, which
includes upgrades to stormwater pump stations and gravity drainage
wells. Because the improvements proposed by this drainage master
plan are widespread, Kimley-Horn has been asked to incorporate these
improvements into the undergrounding master plan to realize efficiencies
in constructing them at the same time. Some of the benefits of performing
projects concurrently include:
 increased scheduling coordination,
 reduction of long term traffic impacts, and
 cost savings resulting from shared restoration costs.
The stormwater master plan breaks down improvements into two tiers.
Tier 1 includes implementation of backflow preventers on stormwater
outfalls to reduce the tidal effects on low lying areas. This portion of the
stormwater master plan has been completed. Tier 2 is a much more
extensive undertaking that includes a $24-million plan of improvements.
Although the Village has setup a stormwater enterprise to pay for
drainage improvements, the Village currently does not have the budget
to incorporate all the improvements identified in this stormwater master
plan. The Village has recently hired a financial consultant to identify and
establish the necessary fees to pay for these improvements. To spread the
cost of these improvements over the long term, the stormwater master
plan establishes a 10-year phased completion schedule. Although this plan
extends beyond the estimated timeframe of the underground conversion
program, the Village may elect to accelerate these improvements to share
costs and avoid extending impacts to the Village residents.
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A map of the drainage basin areas anticipated to receive improvements
has been created to graphically describe the improvement locations
and anticipated construction years. This map can be seen on the
following page.
4.3.3
Miami-Dade County Public Works
Miami-Dade County’s consultant, High Tech Locating, provided atlas level
data for underground street light and traffic signal systems present within
the Village. Although Crandon Boulevard is listed as a state highway, the
County manages and maintains street lights and traffic signals on Crandon
Boulevard within the Village. The County also maintains school flashers
on Harbor Drive for St. Agnes School. The County currently has no capital
projects planned for Crandon Boulevard.
4.3.4 Miami-Dade Water and Sewer
Department
Miami-Dade County Water and Sewer Department provided atlas level
GIS data for the water distribution and sanitary sewer systems within the
Village. The County provides the Village with drinking water and sanitary
sewer services under an inter-local agreement. Provided with the GIS
data was information related to the material type of individual segments
of the water main system. This will help identify opportunities to replace
watermains that have exceeded their useful life during the implementation
of the undergrounding program so work can be properly coordinated. The
County does not currently have any organized program for the systematic
replacement of these aged watermains, so replacement is expected to be
performed on an opportunistic basis.
The County has no plans for targeted long term watermain replacement
that could be accelerated to be accomplished during the undergrounding
program. However, Village staff expressed interest in replacing all existing
asbestos cement (AC) water main pipe. Kimley-Horn will identify these
segments to be considered for inclusion in the undergrounding program.
It is important to note that the County’s data included water mains that
were identified as “unknown” material. During the design phase, in-field
investigation will take place to ensure these water mains are appropriately
categorized and included in the scope of improvements as necessary.