NASA Road 1 over I-45: Keys to Accomplishing Rapid Bridge Replacement

• Incentive of $10,000.00 per day for each day less than 31 days to open the bridge to traffic (maximum $100,000.00)
• Seven calendar day definition of working day regardless of weather conditions, materials or supplies
• Maximize use of precast components with generous tolerance for construction error (precision takes time)
• Delay start time to allow for fabrication of precast components
• Ability of contractor to mobilize manpower and equipment
• Relief from time related contract provisions to the maximum extent possible
  • Using alternative curing methods (membrane cure)
  • Eliminating concrete surface treatment (takes time to dry the deck)
  • Determining lowest concrete strength required for sequential loading (2000 psi for beam placement on bent caps)
  • Use temporary pavement markings (permanent markings require a dry deck for installation)
• Close coordination and planning between the area office and contractor and between the area office and district and division support
• High performance concrete (both strength and durability definition)