(C) 2016 GREAT WESTERN CORPORATION
P.O. BOX 986 NORTH BEND, OR 97459 U.S.A.
Phone: (541) 756-5627 | Fax: (541) 756-7800
YAQUINA BAY BRIDGE NORTH APPROACH (1986)
This was the first cathodic protection bridge project
done for the Oregon D.O.T. We installed various
types of cathodic protection to allow ODOT to monitor
results and make decisions about how to use the
technology in future projects.
CAPE CREEK BRIDGE REHABILITATION PROJECT (1990-91)
The Cape Creek Bridge Rehabilitation project was the largest renovation and
cathodic protection project ever undertaken anywhere in the world in 1990.
We at GWC were 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 back on the Cape Creek project
are still the Oregon industry standard today. The Cape Creek project began
in April of 1990 and ran through December of 1991. There were115,000
square feet of zinc applied, and 7,780 square feet of concrete restored.
As of an inspection survey in 2006,
approximately 80% of the zinc anode
was still sound and the CP system
functioning.
BEFORE
AFTER
YAQUINA BAY BRIDGE ARCH SPANS (1992-94)
The Yaquina Bay Bridge Arch Span projectr was again the
largest Restoration and Cathodic Protection project in the
world during it's time of renovation. The Yaquina Bay Bridge
was comprised of 195,000 square feet of concrete surface to
apply zinc anode on, and 21,250 square feet of concrete
restoration. The Yaquina Bay project was began in August of
1992 and was completed in 1994. GWC was again selected
as one of the key players in the cathodic protection process
on this project. A recent inspection survey on the Yaquina
Bay Bridge found that approximately 60% to 70% of the zinc
anode was still sound and functioning.
Over the past twenty two years GWC has successfully
completed, or been a key player in completing, over
730,000 square feet of concrete surface and cathodic
protection of steel reinforced concrete structures.
DEPOE BAY BRIDGE (1993-96)
This bridge was originally constructed at half the
existing road. This provided a unique set of
circumstances to enclose two double-arches that were
not aligned with each other and to perform repair
operations on what was essentially two separate
structures that used construction methods decades
apart. This project included 70,000 square feet of
cathodic protection. As it is located in the heart of the
little tourist town of Depoe Bay, Oregon, performing the
work with the minimum impact to pedestrian or
motoring traffic was essential.
This project was featured
in a 1994 edition of
McGraw-Hill’s
Construction Data & News
This was the third phase of the
cathodic protection system installed on
the bridge in Newport. It included
65,140 square feet of cathodic protection.
YAQUINA BAY BRIDGE SOUTH APPROACH SPANS (1996-97)
BEFORE
AFTER
BEFORE
AFTER
CAPE PERPETUA VIADUCT (1997)
This is actually half a bridge that is
built into the hillside. It also required a
platform and enclosure hanging over
a cliff. Three different types of cathodic
protection were installed on this
project so that ODOT could study the
effectiveness and practicality of new
technologies in this field. Impressed
current c.p. with metalized zinc,
galvanic c.p. with metalized
zinc-aluminum-indium, and zinc
hydrogel, a new adhesive system from
3M, were installed to provide 1,839
square feet of cathodic protection.
BEFORE
AFTER
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