Underground Electrical Duct Bank
McCauley Street
Pittsboro Street
South Columbia Street
McCauley, Pittsboro, and Columbia Street
August 9, 2006
Neighborhood Meeting
Construction Process
Underground Electrical Duct Bank
•Purpose
–Increase reliability and capacity of power to campus facilities and UNC
Hospitals
–Provides a critical connection to the Manning Substation
•Implementation
–Install underground duct bank in McCauley, Pittsboro, and South Columbia Streets
–Four phases:
•Phase 1 RansomRansom-McCauley Intersection: Fall of 2006 with 1.5 month duration
•Phase 2 McCauley Street: Winter of 2007 with 7 month duration
•Phase 3 Pittsboro: Fall of 2007 with 4 month duration
•Phase 4 S. Columbia: Fall of 2007 with 4 month duration
•Needs to be complete by Spring 2008
McCauley, Pittsboro, and S. Columbia Street
Construction Process
Underground Electrical Duct Bank
•Duct Bank Construction
–Six foot wide trench in street and eight
feet deep
–6 inch conduits encased in concrete
buried three feet below street
•High voltage transmission and
distribution circuits
•Telecommunications and control
circuits
McCauley, Pittsboro, and S. Columbia Street
Construction Process
Underground Electrical Duct Bank
Construction limited to
Right of Way
Approximately 6 new
access vaults
Phase 1 Construction:
Intersection of McCauley
and Ransom Streets
Fall 2006
1.5 month duration
Phase 2 Construction:
McCauley Street
Winter 2007
7 month duration
McCauley Street
Construction Process
Underground Electrical Duct Bank
No plantings, or retaining
walls will be removed.
Install in west bound
lane (north side)
Access vault will
span from
sidewalk to road
16’
16’ x 8’
8’
McCauley Street
EXAMPLE CROSS-SECTION A
Construction Process
Underground Electrical Duct Bank
Road Closed to Thru
Traffic
McCauley and Pittsboro Intersection
Road Closure with DETOUR
Pedestrian Traffic on
north side closed to
pedestrians
McCauley Street
Construction Process
Underground Electrical Duct Bank
East bound lane open for
neighbor traffic
Driveway access in
evening
TYPICAL STREET CONSTRUCTION
Lane Closure with one way traffic
McCauley Street
Construction Process
Underground Electrical Duct Bank
Installed in sections to
limit the number of
driveways blocked
to 1 to 3 driveways.
Flaggers used to control
one way access
Section opened in
evening for two
way traffic
TYPICAL STREET CONSTRUCTION
Lane Closure with one way traffic
McCauley Street
Construction Process
Underground Electrical Duct Bank
Phase 3 construction:
Pittsboro Street
Fall 2007
4 month duration
Left Lane (east side)
closed
Pittsboro Street
Construction Process
Underground Electrical Duct Bank
Right lane
open to
thru traffic
Pedestrian traffic closed
on east side
Pittsboro Street
EXAMPLE CROSS-SECTION
Construction Process
Underground Electrical Duct Bank
Lane Closure for
crossing only
(One lane at a time)
Pedestrian traffic
closed on east side
Phase 4
construction:
S. Columbia Street
Fall 2007
4 month duration
Duct bank installed
off street
Columbia Street
Construction Process
Underground Electrical Duct Bank
Questions
and
Comments
McCauley, Pittsboro, and S. Columbia Street
Construction Process