Gardner River Bridge - Grand Loop Road - Wyoming
Posted by: Groundspeak Premium Member Volcanoguy
N 44° 57.440 W 110° 40.682
12T E 525394 N 4978261
The Gardner River Bridge in the Grand Loop Road Historic District at Yellowstone National Park.
Waymark Code: WMD91Q
Location: Wyoming, United States
Date Posted: 12/06/2011
Published By:Groundspeak Premium Member silverquill
Views: 6

The Gardner River Bridge has four main spans (riveted steel deck trusses) plus approach spans for a total structural length is 962 feet from end of wing wall to end of wing wall. The four main spans (184 feet each) plus supports have a length is 805 feet. The three support towers have heights of 95, 145, and 150 feet. The maximum height of the bridge is 201 feet above the normal water line of the Gardner River. The bridge deck width is 28 feet while the bridge roadway from curb-to-curb is 25.1 feet wide. The alignment of the structure is on a tangent and on has a uniform downgrade from east to west.
Planning for a new bridge to replace 1905 Army bridge across the Gardner River began in 1930 with surveys of several possible routes. After several years of discussions this location with a high bridge was chosen. The final bridge plans were finished in 1938 and the bridge construction contract was awarded to Guy James of Tulsa, Oklahoma, in January 1939. The bridge was completed on November 14, 1939 at a total cost of $247,339.36.

The Grand Loop Road Historic District is a 140.14 mile road system which provides the primary visitor access to the major points of interest and visitor facilities in Yellowstone National Park. The Grand Loop Road extends south from the origin point in Mammoth to Norris Junction (Segment A); travels in a westerly direction to Madison Junction (Segment B); extends south to Old Faithful (Segment C); the turns east to West Thumb (Segment D); roughly follows the lakeshore north to Fishing Bridge (Segment E); then northwesterly to Canyon Junction (Segment F); northeast from Canyon to Tower (Segment G); then turns west towards Mammoth (Segment H) returning to the origin point; a center section connects Norris Junction and Canyon Junction (Section I).
The current alignment of the Grand Loop Road grew from early wagon trails that followed river valleys and lakeshores. During the first 30 years of development, the road was in constant change, but by 1905 the interior road system connecting natural attractions, hotels, and entrance roads had stabilized into the present figure-eight configuration known as the Grand Loop Road. Having been built over many decades with many different standards, techniques, materials, and under many administrators, the Grand Loop Road retains basically the same configuration as it was first built, although some small sections have been abandoned or transformed into scenic roads.

Above information comes from the Historic District Registration Form on the NPS website: (visit link)
Name of Historic District (as listed on the NRHP): Grand Loop Road

Link to page with the Historic District: [Web Link]

Segment H of Grand Loop Road east of Mammoth, Wyoming

How did you determine the building to be a contributing structure?: Narrative found on the internet (Link provided below)

Optional link to narrative or database: [Web Link]

NRHP Historic District Waymark (Optional): Not listed

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Recent Visits/Logs:
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Dory The Explorer visited Gardner River Bridge - Grand Loop Road - Wyoming 09/10/2011 Dory The Explorer visited it
Volcanoguy visited Gardner River Bridge - Grand Loop Road - Wyoming 09/29/2010 Volcanoguy visited it

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