Item No. 8b_supp
Meeting Date: September 10, 2019

Passenger Loading Bridge (PLB) Replacement
- Additional Funding
Commission
9/10/19

PLB Project Locations
• Nine (9) PLB's
were approved
for replacement
under CIP
#800793
• Three (3) have
been completed
(Green)
• Three (3) are
designed
(Yellow)
• Three (3) will
start design
early in 2020
(Red)

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2

Cost Drivers
• Discovery of subterranean lines
• Lack of as-builts for existing Passenger Loading Bridge foundations
• Foundation expansions to meet new seismic code requirements
• Hydronic isolations for Pre-Conditioned air system
• 400 Hz aircraft power system replacement and upgrades
• Electronic Ground Support Equipment charging station and other
building interference

3

Project Cost Drivers - Gate S11
Original
Foundation
location

New
Foundation
and anchor
bolts

• Construction challenges
- One of the foundation bolts had been destroyed and
another was damaged
- A new foundation was required
- A water line runs right through the rotunda foundation
- New seismic code requirements
• Long fixed walkway
- Increased mechanical cost
• Budget
- Original Estimate: $1,100,000
- Actual Cost: $1,429,000

4

Project Cost Drivers - Gate S6
• The PLB failed prior to the scheduled replacement
- Resources were reassigned to expedite the bridge replacement
- Other bridges that were in design were delayed

• Construction challenges
- Unidentified foundation conditions
- Existing foundation modification did not meet seismic code,
requiring demolition and new expanded foundation
- Aircraft Power was consolidated into one larger supply box

• Budget
- Original Estimate: $1,100,000
- Actual Cost: $1,211,000

5

Project Cost Drivers - Gate C15
• Construction challenges
- Water line located within the planned foundation
expansion
- Location of an unknown industrial wastewater
system line
- Drilled shaft foundation
- Addition of an extended corridor section
- New 400 Hz aircraft power unit needed as existing
PLB did not have one

• Budget
- Original Estimate: $1,100,000
- New Estimate: $1,341,000
6

Project Cost Drivers - Gate D4
• Construction challenges
- Hydronics System
• No Isolation valves at the individual gates;
isolation valves will need to be installed
before PLB can be replaced
• Long length of piping along the fixed
walkway

- Original Estimate: $1,100,000
- New Estimate: $1,365,500

7

Project Cost Drivers - Gate B10
• Construction challenges
- Integrated Wastewater System lines surround
the existing foundation
• Three Manholes

- Abandoned Fuel line
• Mitigation and removal

- Drilled shaft foundation and extended corridor
to minimize impacts to Pre-Conditioned air
- Water collection and treatment plan

• Budget
- Original Estimate: $1,100,000
- New Estimate: $1,491,000
8

Project Cost Drivers - Gate D11
• Construction challenges
- Fixed walk way foundations
• Two drilled shaft foundations are needed (Fixed walkway)
• One spread footing (Rotunda)

- Electrical system identification
• Multiple electrical systems are run on the fixed walkway
that are not part of PLB
• Will require cutover and new design for hazardous waste
building

- Pre-Conditioned Air valves do not isolate fixed walkway

• Budget
- Original Estimate: $1,100,000
- New Estimate: $1,377,500

9

Project Cost Drivers - Gate C11
• Construction challenges

C11

C15

- Water line located within the planned
foundation expansion
- Drilled shaft foundation
- Addition of an extended corridor section

• Budget
- Original Estimate: $1,100,000
- New Estimate: $1,229,500

10

Project Cost Drivers - Gate C18
• Construction challenges
- Double fixed walkway
• Long Hydronics runs (Pre-conditioned air
system)
• Electronic Ground Support Equipment
system charging station Interference

- Foundation interferences
• Budget
- Original Estimate: $1,100,000
- New Estimate: $1,569,500

11

Project Cost Drivers - Gate C9
• Construction challenges
- Concourse C 400 Hz airplane power
generation system
• Major works
• Separate set of drawings/documents

- Foundation interferences
• Budget
- Original Estimate: $1,100,000
- New Estimate: $1,816,500 ($716,500)

12

Additional Funding Request
• Request: increase the project authorization by $3,000,000
- Total project estimate: $13,000,000
• Complete the replacement of the nine (9) scheduled bridges
• 2015 Project Estimate per PLB: $1,100,000
• 2019 Average per PLB: $1,425,611

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