US 101: Siuslaw River Bridge Cathodic Protection
2015-2018 GNWC’s main scope of work was to install a cathodic protection system on the approach and tied arch spans of this bridge which spans the Siuslaw River on US101 in Florence, OR. In addition to cathodic protection, work also included replacement of the exiting ornamental bridge rail, installation of seismic restrainers and replacement of the existing bearings. |
|
McCullough Bridge Repair & Cathodic Protection
2007-2018 (two contracts) This eleven-year cathodic protection process involved the restoration of the Historic McCullough Bridge on Highway 101 in North Bend, Oregon. These two highly challenging projects required an environmental enclosure (185-feet-long x over 140-feet-high). The enclosure could not add additional weight to the historic bridge and had to be moved 15 times as the projects progressed. Simultaneously during each move, the enclosure had to be adjusted vertically approximately eight feet, to match the elevated grade of the bridge deck. |
|
Cape Creek Bridge Rehabilitation
1990-1991 and 2018 The Cape Creek Bridge Rehabilitation project was the largest renovation and cathodic protection project undertaken anywhere in the world at the time. GNWC was selected to work with ODOT in developing and expanding the knowledge and procedures as they pertained to impressed current cathodic protection systems on steel reinforced concrete bridges. Many of the techniques and procedures developed on the original Cape Creek project are still the industry standard today. 115,000 square feet of thermally applied zinc was installed, and 7,780 square feet of concrete repaired. In August of 2018 GNWC was again awarded a contract to return to the Cape Creek Bridge to replace the original spent anode on the structure. |
Cape Perpetua Viaduct
1997 and 2018 Three different types of cathodic protection (CP) were installed on this project so ODOT could study the effectiveness and practicality of new technologies in the field. Impressed current CP with metalized zinc, galvanic CP with metalized zinc-aluminum-indium, and zinc hydrogel were installed to provide 1,839 square feet of cathodic protection. In August of 2018 GNWC was awarded the contract to replace all of the old CP systems with a new thermally applied zinc impressed current system powered by wind generated power. |
|
Patterson Memorial Bridge Repair & Cathodic Protection
2001-2004 This project included over 361,778 square feet of thermally applied zinc and 8,445 square feet of concrete repair. |
Depoe Bay Bridge
1993-1996 This project included 70,000 square feet of thermally applied zinc anode and thousands of square feet of concrete repair. Since the bridge is located in the heart of historic Depoe Bay, Oregon, performing the work with minimal impact to pedestrians or vehicular traffic was essential. |