Because of its historic significance (listed on the National Register of Historic Places) and strong support from the local community, the Rainbow Bridge in Idaho was designated for rehabilitation, rather than replacement. After years of exposure to deicing chemicals corrosion of the reinforcing steel was occurring and beginning to affect the integrity of the structure. The overall scope of the work included concrete patch repairs, replacement of selected items, and rehabilitation of the arches.
Independent consultants for the owner completed a comprehensive corrosion and structural survey. The chloride testing, corrosion potential testing, and a visual and tactile survey indicated that the most severe corrosion in the substructure was near the deck drains and the joints.
The corrosion mitigation strategy utilized two systems to protect different sections of the structure: electrochemical chloride extraction was utilized for the concrete arch substructure and galvanic anodes were used around the perimeter of concrete patch repairs in the areas that did not receive the electrochemical treatment.
The specified corrosion mitigation systems offered the best combination of service life, cost, and maintenance without major impact on the appearance of the historic structure. After the rehabilitation, the structure has been preserved for the enjoyment of future generations.
Award of Excellence
Country Club Towers Apartments Improvements
High-Rise — Tadjer-Cohen-Edelson Associates, Inc.
Award of Excellence
Bok Tower Restoration
Historic — Sika Corporation
Award of Excellence
Port of Canaveral North Cargo Piers Concrete Repair and Cathodic Protection
Industrial — Vector Corrosion Technologies
Award of Excellence
Montgomery County Underground Garage Restoration
Longevity — Carl Walker, Inc.
Award of Excellence
Marriott Frenchman’s Reef and Morningstar Beach Resort Balcony Repairs
Low-Rise — C.A. Lindman, Inc.
Award of Excellence
Auditorium Plaza Garage Repairs and Improvements
Parking Structures — Structural Engineering Associates
Award of Excellence
Historic Preservation of Hoare’s Bank
Special Projects — C-Probe Systems, Ltd.
Award of Excellence
Structural Reinforcement of Jaime Roldós Aguilera Bus Terminal
Strengthening — BASF Construction Chemicals
Award of Excellence
Concrete Construction of Three Underground Water Storage Tanks
Water Structures — Gale Associates, Inc.
Award of Merit
The George Washington University Ross Hall Façade Restoration
High-Rise — Concrete Protection and Restoration, Inc.
Award of Merit
Restoration of Tucson’s Historic Fox Theatre
Historic — QuakeWrap, Inc.
Award of Merit
U.S. Marine Corps War Memorial Rehabilitation
Historic — The Armbruster Company
Award of Merit
NASA Vehicle Assembly Building Roof Refurbishment
Industrial — Cathodic Protection Technology of Florida, Inc.
Award of Merit
Pointe Pass-A-Grill Condominium Repair
Low-Rise —Cathodic Protection Technology of Florida, Inc.
Award of Merit
United States Air Force Harmon Hall Repair Project
Low-Rise — Sika Corporation
Award of Merit
Ottawa Towers Plaza and Parking Restoration
Parking Structures — Carl Walker, Inc.
Award of Merit
Parking Garage Repairs at a Chicago Condominium Complex
Parking Structures — CTL Group
Award of Merit
Parking Garage Repairs for the Parking Authority of River City
Parking Structures — Schnell Contractors, Inc.
Award of Merit
Arizona State University Sun Devil Stadium Repairs
Special Projects — Gervasio & Associates, Inc.
Award of Merit
Commercial Kitchen Structural Rehabilitation
Special Projects — Halcrow Yolles
Award of Merit
Shotcrete Restoration of JEA Hyperbolic Cooling Tower Veil
Special Projects — The Euclid Chemical Company
Award of Merit
Leon County Courthouse Parking Garage Repair and Strengthening
Strengthening — Structural Preservation Systems, Inc.
Award of Merit
Garden City Skyway Substructure Corrosion Mitigation
Transportation — Vector Construction Group
Award of Merit
Emergency Repair of SH 183 Bridge on Loop 12
Transportation — Gibson & Associates, Inc.
