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Nicholson Construction Company Release date: July 30, 2009
CANTON, OK - July 30, 2009 - Nicholson is making steady progress on the Canton Lake Dam Auxiliary Spillway Channel Excavation project in Canton, OK. The U.S. Army Corps of Engineers Tulsa District awarded the project to Nicholson in September 2008 and construction began a month later.
Nicholson's largest contract to date, the project involves the construction of a new, auxiliary spillway that will accommodate a flood exceeding the current spillway's capacity. The new spillway, which is 820 feet long and 670 feet wide, will require the excavation of 1.6 million cubic yards of material to create the channel. In a previous contract, Nicholson installed 64, 32-strand high-capacity post-tensioned dam anchors on the existing main spillway.
The spillway excavation will be supported by diaphragm walls with permanent anchors. Together, the north and south channel walls will be constructed with 79,000 square feet of diaphragm wall. At the downstream end of the diaphragm walls, Nicholson will construct a 670-foot-long cutoff wall with 190 drilled shafts. This is designed to reduce upstream erosion should the spillway's fuse gate system release water during a probable maximum flood event.
The earth excavated to create the channel will be used to construct a toe berm on the downstream of the existing earth dam for improving stability. A new drainage system that is 15 feet deep, 7 feet wide, and 11,000 feet long will be constructed at the toe of the dam. It is designed to intercept and channel seepage to a new outfall structure.
Along with the excavation, other earthwork includes demolition, clearing and grubbing 120 acres of brush, and the construction of a haul road over the North Canadian River.
Nicholson's work began in October 2008 and is scheduled for completion in November 2010. Work on the diaphragm wall began in May 2009 and is due to be completed in August 2009. The cutoff wall and the anchors will follow the diaphragm wall construction.
Canton Lake is used for flood control, generating electricity, navigation, irrigation and supplying potable water. Every year, more than 1 million visitors enjoy the 12.5 square mile area for fishing and navigation.
About Nicholson Construction Company:
Nicholson is a versatile geotechnical contractor specializing in deep foundations, earth retention, ground treatment, and ground improvement. As the North American business unit of the Soletanche Bachy Group, one of the world's leading geotechnical contractors, we are part of a global network of geotechnical resources and expertise. We work in a wide range of industries and environments, from power plants and dams, to bridges and skyscrapers. Headquartered in Pittsburgh, Nicholson has eight offices around the country to address each region's unique geotechnical construction needs.
Contact: Brian O'Gara, Business Development Coordinator
Phone: 412-221-4500
Email: bogara@nicholsonconstruction.com
Company Information:
Name: Nicholson Construction Company
Address: 12 McClane St.
City: Cuddy
State: PA
ZIP: 15031
Country: USA
Phone: 412-221-4500
FAX: 412-221-3127
http://www.nicholsonconstruction.com
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