Historic Bridges of the U.S. | Pyrtle Spring Bridge

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Photos

Overview

A triple pony truss is a rare treat, but even better is the fact that this road is decommissioned and carries little if any traffic -- providing the perfect opportunity to explore.

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Deck view

Some of the asphalt overlay has peeled away to reveal the concrete underneath. Considering that this road receives no maintenance, however, the bridge and approaches are in reasonably good shape.

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View of bridge and old road alignment

Another view of the deck, looking towards the east

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Close-up of truss

In this close-up, notice how the truss rests directly on the concrete pier.

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Plaque

Missouri
Highway Dept.
Bridge No. G.380
1923

Facts

Overview: Three-span pony truss bridge over Sinking Creek on Old MO 21
Location: Reynolds County, Missouri
Status: Open to traffic on a paved road with a 12 ton weight limit
History: Built 1923; made obsolete by a new bridge in 1968
Design: Warren pony truss
Dimensions: Length of largest span: 60.0 ft.
Total length: 222.0 ft.
Deck width: 21.0 ft.
Approximate latitude, longitude: +37.35561, -90.96999 (decimal degrees)
37°21'20" N, 90°58'12" W (degrees°minutes'seconds")
Approximate UTM coordinates: 15/679787/4136255 (zone/easting/northing)
Land survey: T. 31 N., R. 1 E., Sec. 29
USGS topographic map: Redford
Inventory numbers: MoDOT G-380 (Missouri Dept. of Transportation bridge number)
MONBI 23117 (Missouri bridge number on the National Bridge Inventory)
BH 22448 (Bridgehunter.com ID)
Inspection (as of 01/2008): Deck condition rating: Satisfactory (6 out of 9)
Superstructure condition rating: Satisfactory (6 out of 9)
Substructure condition rating: Satisfactory (6 out of 9)
Appraisal: Structurally deficient
Sufficiency rating: 49.4 (out of 100)
Average daily traffic (as of 2006): 30