Johnston Bridge

Map 

Facts 

Note: The following information comes from the National Bridge Inventory and has not been verified.

Overview

Lost pony truss bridge over South Branch Plum Creek on TR 666

Location

Armstrong County, Pennsylvania

Status

Replaced by new bridge

History

Built 1904; rehabilitated 1953; replaced 2001

Design

Pratt pony truss

Dimensions

Length of largest span: 66.9 ft.
Total length: 71.9 ft.
Deck width: 11.5 ft.

Approximate latitude, longitude

+40.72429, -79.27599   (decimal degrees)
40°43'27" N, 79°16'34" W   (degrees°minutes'seconds")

Approximate UTM coordinates

17/646401/4508749 (zone/easting/northing)

USGS topographic map

Elderton

Inventory numbers

PA 03 7219 0666 0014 (Pennsylvania Bridge Management System number)
PANBI 41336 (Pennsylvania BRKEY bridge number on the 2011 NBI)
BH 41415 (Bridgehunter.com ID)

Inspection (as of 07/1991)

Deck condition rating: Good (7 out of 9)
Superstructure condition rating: Fair (5 out of 9)
Substructure condition rating: Fair (5 out of 9)
Appraisal: Functionally obsolete
Sufficiency rating: 49.7 (out of 100)

Average daily traffic (as of 1978)

50

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