HARBOR SYSTEM MASTER PLAN - City and Borough of Sitka

Findings
Sitka Harbor System Master Plan
Condition Inventory
The electrical systems have supported the Work Float
for approximately 23 years. The power system
components have been well used and they are nearing
the end of their service life. The lighting system is in
better condition with service life remaining.
Power Distribution:
Utility Transformer: The pad mount transformer
appears to be in good condition with many years of
service life remaining.
Electrical Datum Plane Bench Mark: No bench mark
identifying the “Electrical Datum Plane” is located at
this facility.
Services: The service equipment located on the shore
is in fair to good condition with some corrosion
visible on the surface. It appears to have five years of
service life remaining.
Grounding: The grounding equipment appears to be
in good condition on the surface. The sea water
electrode may be corroded beneath the float.
Service Feeder: The service feeder beneath the Approach Dock is in fair to good condition. The
junction box beneath the Approach Dock near the gangway is in poor condition and needs replacement.
The PVC conduit on the gangway, supporting the Type W cable is in poor condition with broken
supports. The type W cable dips into the water at
the higher tides exposing it to debris and straining
its supports. This portion of the feeder is in poor
condition and needing repair in the near future.
Panel Board: The panel board (load center) uses
plug-in style circuit breakers. This type is more
susceptible to corrosion, heating at points of
contact, and failure. It is suitable for a residential
application, but not a marine application. It is
nearing the end of its service life.
Receptacles: The receptacles are types commonly
used for these applications. The equipment and
shore-tie receptacles are manufactured to be used
in a marine environment while the convenience
receptacles are made for commercial applications.
The equipment receptacles are not Ground Fault
protected. The enclosures are rated for weather
applications. All of these receptacles present the
appearance of being well used. They are in fair
condition with less than five years of service life
remaining.
142