Historic Bridges
of the United States
Johnston Bridge
Armstrong County
,
Pennsylvania
Overview
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Terraserver USA
Facts
Overview
Pony truss bridge over Plum Creek on PA 2069
Location
Armstrong County
,
Pennsylvania
Status
Open to traffic
History
Built 1904; rehabilitated 1927
Design
Pratt pony truss
Dimensions
Length of largest span: 71.9 ft.
Total length: 80.1 ft.
Deck width: 14.4 ft.
Approximate latitude, longitude
+40.70111, -79.32222
(decimal degrees)
40°42'04" N, 79°19'20" W
(degrees°minutes'seconds")
Approximate UTM coordinates
17/641742/4506931
(zone/easting/northing)
USGS topographic map
Elderton
Inventory numbers
PA 03 2069 0010 0000
(Pennsylvania bridge number)
BH 30341
(Bridgehunter.com ID)
Inspection
(as of 01/2007)
Deck condition rating:
Serious
(3 out of 9)
Superstructure condition rating:
Critical
(2 out of 9)
Substructure condition rating:
Poor
(4 out of 9)
Appraisal:
Structurally deficient
Sufficiency rating: 17.3
(out of 100)
Average daily traffic
(as of 2006)
151
Categories
Armstrong County, Pennsylvania
(18)
Built 1904
(176)
Built during 1900s
(2,419)
Open
(21,831)
Owned by state
(6,653)
Pennsylvania
(1,702)
Pony truss
(9,484)
Pratt truss
(1,569)
Span length 50-75 feet
(4,716)
Steel grate deck
(356)
Structurally deficient
(10,855)
Total length 75-100 feet
(3,374)
Truss
(16,070)
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