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 HBG
Flatiron received national recognition for its construction
of a series of projects in the Glenwood Canyon corridor of I-70
between August 1987 and January 1994. All of these projects
for the Colorado Department of Transportation were built under
stringent environmental and traffic disruption restrictions,
harsh winter working conditions and restricted workspaces. HBG
Flatiron crews excelled at constructing these extremely
technical projects to very high standards and completing them
on or ahead of schedule.
The first precast segmental
structures built during the construction of I-70 through the
environmentally sensitive Glenwood Canyon were at Grizzly Creek
West. These five segmental bridges contain a total of 15 spans
varying in length from 105 to 132 feet, for a total linear length
of 2,116 feet.
At Hanging Lake Viaduct three
precast concrete segmental bridges were built for a total of
8,430 lineal feet. Spans of 200 feet were placed as balanced
cantilevers using an overhead-launching gantry. Maximum span
lengths of 300 feet were placed at the twin structures over
the Colorado River. Both external and internal post-tensioning
were utilized. |
At French Creek Eastbound, HBG Flatiron constructed 1.9
miles of interstate highway, an 8-span cast-in-place, post tensioned
box girder bridge, a pedestrian bridge, precast retaining walls,
and box culverts.
On the French Creek Viaduct
project, HBG Flatiron constructed two precast concrete
segmental bridges, a 3,139-foot, 16-span structure and a 1,327-foot,
7-span structure. The firm cast 584 bridge segments in a casting
yard near the project. The project also included mechanically
stabilized earth walls, bridge railings, landscaping, rock bolting,
and caisson drilling.
American Concrete Institute's
Project of the Year
Association of General Contractors
Build America Award
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