Historic Bridges of the U.S. | Bird's Nest Bridge

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Overview: Through truss bridge over Meramec River on Bird's Nest Road north of Steelville
Location: Crawford County, Missouri
Status: Open to traffic on a paved road with a 3 ton weight limit
History: Built 1914 by Miller & Borcherding Bridge Builders of St. Louis
Builders: - Miller & Borcherding Bridge Builders of St. Louis, Missouri
- Township Supply Co.
Design: From north to south:
One riveted, half-hip Pratt pony truss (added later)
Two steel stringer spans
One pin-connected, 12-panel Pennsylvania through truss
One pin-connected Pratt pony truss
Three steel stringer spans
Dimensions: Length of largest span: 249.9 ft.
Total length: 512.0 ft.
Deck width: 15.1 ft.
Vertical clearance above deck: 14.2 ft.
Approximate latitude, longitude: +37.99866, -91.35887 (decimal degrees)
37°59'55" N, 91°21'32" W (degrees°minutes'seconds")
Approximate UTM coordinates: 15/644094/4206937 (zone/easting/northing)
Land survey: T. 38 N., R. 4 W., Sec. 21
USGS topographic map: Steelville
Inventory numbers: MONBI 19098 (Missouri bridge number on the National Bridge Inventory)
BH 21368 (Bridgehunter.com ID)
Inspection (as of 02/2007): Deck condition rating: Very Good (8 out of 9)
Superstructure condition rating: Poor (4 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 24.6 (out of 100)
Average daily traffic (as of 2007): 100