Home › Pennsylvania › Armstrong County › T-666 Barks Hill over South Branch Plum

T-666 Barks Hill over South Branch Plum Creek

Armstrong County, Pennsylvania · rated Fair in the 2025 National Bridge Inventory

United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled August 20, 2026

T-666 Barks Hill over South Branch Plum Creek in Armstrong County, Pennsylvania, is rated in fair condition in the 2025 National Bridge Inventory (as of August 20, 2026).
Its lowest-rated component is the substructure, rated 6 (satisfactory condition) on the 0-9 scale.
It was built in 2001, making it 24 years old at the 2025 inventory.
It carries about 140 vehicles a day (traffic count year 2019).
Its listed owner is the county highway agency.
It is one of 150 of the 259 inventoried bridges in Armstrong County rated fair (57.9%); 18 (6.9%) are rated poor.
A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.

Component ratings


Structure	Prestressed concrete multiple box beam
Length	about 83 ft
Location	1500 feet s. of SR 4009
NBI structure number	000000000041336
Condition class	Fair

Source: FHWA National Bridge Inventory, 2025 data as reported by the Pennsylvania department of transportation.

Bridge	Built	Vehicles/day	Condition
Njtpk(i-95 Pa Ext) over Delaware River & Roads	1956	67,799	Fair
Nj Rt 73 over Delaware River	1929	42,270	Fair
Co Rt 413 over Delaware River	1931	26,315	Fair
SR 1038 over Allegheny River	1931	22,150	Fair
SR0066 Nb&sb over SR0422;SR2025;GARRETTS	1980	19,609	Fair
SR0422 over SR0028 Nb&sb	2001	18,527	Fair