US Bridges

Twp RTE T550 over Big Brook

Fair

Wayne County, Pennsylvania · Dyberry Bridge · Structure no. 000000000035853

Built
1905
120 years old, rebuilt 1997
Condition
Fair
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
40 ft
1 main span
Daily traffic
40
1997 count
Owner
County
County Highway Agency

About this bridge

Twp RTE T550 over Big Brook is a steel stringer/multi-beam or girder carrying Twp RTE T550 over Big Brook in Wayne County, Pennsylvania. It was built in 1905 and reconstructed in 1997, so it is 120 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 65 by 2032. The structure is 40 ft (12.2 m) long and 13 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesTwp RTE T550
CrossesBig Brook
LocationDyberry Bridge
RouteCity Street 0
CountyWayne County
StatePennsylvania
Coordinates41.63676, -75.2597
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.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating73 US tons
Inventory rating50 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckOpen grating
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span34 ft (10.4 m)
Deck width13 ft (4 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (1997)
Projected traffic65 by 2032
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$321,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Twp RTE T550 over Big Brook built?

It was built in 1905, making it 120 years old in 2025. It was reconstructed in 1997.

What condition is Twp RTE T550 over Big Brook 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 July 2023.

How much traffic does Twp RTE T550 over Big Brook carry?

About 40 vehicles per day (1997 count), of which roughly 10% are trucks.

How long is Twp RTE T550 over Big Brook?

The structure is 40 ft (12.2 m) long with a longest span of 34 ft (10.4 m) and a deck 13 ft wide.

Who owns Twp RTE T550 over Big Brook?

It is owned by the County Highway Agency.