Bridgehunter.com | Iron Mountain Road Pigtail Bridge #3

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Iron Mountain Road, Pigtail Bridge, Mt. Rushmore, Black Hills, South Dakota

http://www.blackhillsvacationplanner.com/page-scenic-drives-in-the-black-hills-9.html

Overview: Steel stringer bridge over US 16A, on US 16A
Location: Pennington County, South Dakota
Status: Open to traffic
History: Built 1985
Design: The NBI says that this bridge is a steel stringer, but the bridge has wooden supports.
Dimensions: Length of largest span: 35.1 ft.
Total length: 151.9 ft.
Deck width: 24.0 ft.
Approximate latitude, longitude: +43.87472, -103.43917 (decimal degrees)
43°52'29" N, 103°26'21" W (degrees°minutes'seconds")
Approximate UTM coordinates: 13/625402/4859142 (zone/easting/northing)
USGS topographic map: Iron Mountain
Inventory number: BH 47739 (Bridgehunter.com ID)
Inspection (as of 03/2011): Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Good (7 out of 9)
Substructure condition rating: Good (7 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 82.7 (out of 100)
Average daily traffic (as of 2011): 300