US Bridges

T-406 Jamestown RD over Norfolk Southern RR

Poor

Cambria County, Pennsylvania · 1 Mi.Ne.Of Portage · Structure no. 000000000008757

Built
1931
94 years old
Condition
Poor
inspected December 2023
Type
Girder and Floorbeam System
Steel
Length
79 ft
1 main span
Daily traffic
150
2023 count
Owner
Railroad
Railroad

About this bridge

T-406 Jamestown RD over Norfolk Southern RR is a steel girder and floorbeam system carrying T-406 Jamestown RD over Norfolk Southern RR in Cambria County, Pennsylvania. It was built in 1931, so it is 94 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 150 vehicles a day, roughly 1% of them trucks, projected to reach 192 by 2043. The structure is 79 ft (24.1 m) long and 26 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesT-406 Jamestown RD
CrossesNorfolk Southern RR
Location1 Mi.Ne.Of Portage
RouteCity Street 0
CountyCambria County
StatePennsylvania
Coordinates40.3984, -78.6561
Functional classRural Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating40 US tons
Inventory rating24 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length79 ft (24.1 m)
Longest span77 ft (23.5 m)
Deck width26 ft (7.9 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic150 (2023)
Projected traffic192 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerRailroad
Maintained byRailroad
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.1 million
NavigationNot applicable (no waterway)

Frequently asked questions

When was T-406 Jamestown RD over Norfolk Southern RR built?

It was built in 1931, making it 94 years old in 2025.

What condition is T-406 Jamestown RD over Norfolk Southern RR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in December 2023.

How much traffic does T-406 Jamestown RD over Norfolk Southern RR carry?

About 150 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is T-406 Jamestown RD over Norfolk Southern RR?

The structure is 79 ft (24.1 m) long with a longest span of 77 ft (23.5 m) and a deck 26 ft wide.

Who owns T-406 Jamestown RD over Norfolk Southern RR?

It is owned by the Railroad.