US Bridges

T-400 over Pa Tpk (I-76)

Fair

Chester County, Pennsylvania · North of Marsh Cr.Ser.Pl · Structure no. 000000000010736

Built
1950
75 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
85 ft
1 main span
Daily traffic
200
1992 count
Owner
Toll Authority
State Toll Authority

About this bridge

T-400 over Pa Tpk (I-76) is a steel stringer/multi-beam or girder carrying T-400 over Pa Tpk (I-76) in Chester County, Pennsylvania. It was built in 1950, so it is 75 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 200 vehicles a day, roughly 8% of them trucks, projected to reach 315 by 2030. The structure is 85 ft (25.9 m) long and 26 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesT-400
CrossesPa Tpk (I-76)
LocationNorth of Marsh Cr.Ser.Pl
RouteCity Street 400
CountyChester County
StatePennsylvania
Coordinates40.12431, -75.78305
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.9 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length85 ft (25.9 m)
Longest span80 ft (24.4 m)
Deck width26 ft (7.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (1992)
Projected traffic315 by 2030
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$161,000
NavigationNot applicable (no waterway)

Frequently asked questions

When was T-400 over Pa Tpk (I-76) built?

It was built in 1950, making it 75 years old in 2025.

What condition is T-400 over Pa Tpk (I-76) in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in May 2023.

How much traffic does T-400 over Pa Tpk (I-76) carry?

About 200 vehicles per day (1992 count), of which roughly 8% are trucks.

How long is T-400 over Pa Tpk (I-76)?

The structure is 85 ft (25.9 m) long with a longest span of 80 ft (24.4 m) and a deck 26 ft wide.

Who owns T-400 over Pa Tpk (I-76)?

It is owned by the State Toll Authority.