1. Gordons Corner Road Over US Route 9 Mahesh Patel, P.E. George Afful, P.E. Gregory Bitsko, P.E.

2. About the Bridge Built in 1939 Two span concrete encased steel girder bridge with an open joint at the centerline of the deck creating four superstructure quadrants/sections. Vertical underclearances –13-9 southbound –14-0 northbound Bridge exhibits numerous locations of impact damage with loss of encasement and damage to bottom flange of fascia stringers. Numerous overhead utilities impact constructability. These lines cross immediately over the east and west abutments of the structure and cross Route 9 above the north fascia of the bridge.

3. About the Bridge

4. Proposed improvements Replace the entire superstructure and deck to increase the underclearance to a minimum of 15-0 Electro-Chemical Chloride extraction for substructure preservation Prefabricated superstructure units to reduce the construction duration Self-Propelled Modular Transporters (SPMTs) to remove existing superstructure in sections and install replacement units without relocating utilities Superstructure replacement will be completed in ONE weekend, beginning at 9PM Friday and ending 6AM Monday. No other significant traffic impacts anticipated.

5. Self-Propelled Modular Transporters (SPMTs) Heavy lift system traditionally used in the oil industry A series of interconnected or linked modules, which are computer controlled to operate as a single lifting unit Each module has its own power supply system and has an unrestricted range of movement on the ground System can move forward, backward, sideways, diagonally, as well as in circular and carousel (spin) motions Units adjust vertically between 10 and 16 depending on the manufacturer.

6. Video presentation Island Park Bridge Ottawa, Ontario

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8. Tennent Rd. Gordons Corner Rd. Wickatunk Rd. Franklin Ln. US Route 9 North Franklin Ln.

9. Tennent Rd. Gordons Corner Rd. Wickatunk Rd. Franklin Ln. US Route 9 North Southbound Demolition Staging Area (Municipal Parking Lot) Staging Area (Municipal Parking Lot) Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access

10. Tennent Rd. Gordons Corner Rd. Wickatunk Rd. Franklin Ln. US Route 9 North Southbound Installation Franklin Ln. Staging Area (Municipal Parking Lot) Staging Area (Municipal Parking Lot) Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access

11. Tennent Rd. Gordons Corner Rd. Wickatunk Rd. Franklin Ln. US Route 9 North Northbound Demolition Franklin Ln. Staging Area (Municipal Parking Lot) Staging Area (Municipal Parking Lot) Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access

12. Tennent Rd. Gordons Corner Rd. Wickatunk Rd. Franklin Ln. US Route 9 North Northbound Installation Franklin Ln. Staging Area (Municipal Parking Lot) Staging Area (Municipal Parking Lot) Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access Alternate Ramp Access

13. Advantages Eliminates 8 to 12 months of utility relocations vs. crane installation. Eliminates daytime lane restrictions for utility relocation. Saves over $600,000 in estimated utility relocation costs. Work will be completed in one weekend rather than 10 to 14 months.

14. SPMT Considerations Pick weights generally not a concern. Allows multiple construction activities to occur concurrently Construction activities no longer linear; reduces time. SPMTs can be costly. $375,000 for equipment on this project. Staging area selection critical. Close to site and adequate area required. Different suppliers use different techniques affecting staging requirements.

15. SPMT Considerations Check utilities in staging area. Still need lifting equipment. SPMT costs requires very compressed construction schedule. Design and planning are critical. SPMT use cant be dictated. Use incentive/disincentive provisions with very compressed schedule to encourage use. Refer to FHWA website. Provide detailed equipment specifications. Similar systems are not the same. Circular, carousel and crab movements are critical to defining SPMT. Get the suppliers to visit the site!!!

16. Project Design Considerations Pier set as control for geometry - narrow width. Existing headers removed to top of seats to eliminate conflicts. Prefabricated superstructure with replacement headers. Removing headers provides greater width to accommodate construction adjustments. Existing wingwalls removed to top of seats to eliminate conflicts. Partial demo required to replace bridge parapet, demo simply extended. Steel bolster eliminates one round of grouting. Disc bearings provides greater construction tolerances. Innovative incentive/disincentive provision. Incentive period ends 6PM Sunday, disincentive begins 6AM Monday.

17. Thank You!