C102162 Air Cargo Rd Safety Improvements
Construction Authorization
Item No.
6g attach
Date of Meeting October 13, 2020
Early Work (Completed 2017)
• Critical Pavement Repair
Main Project
• Pavement Remediation
• Sidewalks / Bus Stops
• Cell Phone Lot Improvements
• Traffic Signals
• Roadway Illumination
• Landscaping
Project Scope
2
Original Budget: $ 8,819,590
Revised Budget: $13,500,000
Budget increase due to:
• Scope Changes (additional traffic
signals, Cell Phone Lot
improvements, landscaping,
unknown site conditions, sewer
capacity improvements)
• Consultant vs. Staff Support
• Cost escalation
Original Completion: 2020 Q3
Revised Completion: 2021 Q3
Schedule delay due to:
• Late external review responses
• Protracted consultant rate
negotiations
• Resource constraints
Project Budget and Schedule
3
Anticipated Construction Impacts
• Active construction anticipated Q2 and Q3 2021
• Lane restrictions due to sidewalk construction
– Westbound S 170
th
St reduced by one travel lane
– Air Cargo Rd reduced to one travel lane each direction (no turn lane)
• Temporary partial Cell Phone Lot closure for improvements
• Paving will require closures and detours (night time activity)
– S 170
th
St becomes one-way
– Air Cargo Rd reduced to one lane in each direction
– Airport Expressway On- and Off-Ramp and Cell Phone Lot closures
4
Project Risks
Risk Description Prob. Impact Mitigation Plan
COVID
-19 Cost
COVID
-
19 requirements increase
construction cost
High Medium
Project estimate accounts for
COVID
-19 requirements based
upon current active projects
COVID
-
19 Schedule
COVID
-19 delays material
procurement during construction
Low Medium
Project team tracking local
market conditions
Unknown Site
Conditions /
Contaminated Soils
Project encounters unknown site
conditions or contaminated soils
during construction
Medium Medium
Construction contract includes
force accounts to manage risk
Temporary Signal
Existing Cell Phone Lot signal fails
prior to replacement
Low Medium
Existing O&M contract includes
scope for repairs if required
Cemetery Property
Project encounters unknown or
shifted burial site
Low Medium
Archeological oversight is
planned during adjacent
sidewalk work
5
