US Bridges

T-400 Cty Br 18 over Rapid Run

Fair

Union County, Pennsylvania · 0.3 Mi. N. of Forest Hill · Structure no. 000000000033608

Built
1916
109 years old, rebuilt 1954
Condition
Fair
inspected March 2023
Type
Tee Beam
Concrete
Length
46 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

T-400 Cty Br 18 over Rapid Run is a concrete tee beam carrying T-400 Cty Br 18 over Rapid Run in Union County, Pennsylvania. It was built in 1916 and reconstructed in 1954, so it is 109 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 5 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 50 vehicles a day, projected to reach 78 by 2045. The structure is 46 ft (14 m) long and 19 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesT-400 Cty Br 18
CrossesRapid Run
Location0.3 Mi. N. of Forest Hill
RouteCity Street 0
CountyUnion County
StatePennsylvania
Coordinates40.97827, -77.04831
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60 US tons
Inventory rating36 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length46 ft (14 m)
Longest span42 ft (12.8 m)
Deck width19 ft (5.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic78 by 2045
Trucks0%
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 statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$96,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-400 Cty Br 18 over Rapid Run built?

It was built in 1916, making it 109 years old in 2025. It was reconstructed in 1954.

What condition is T-400 Cty Br 18 over Rapid Run 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 March 2023.

How much traffic does T-400 Cty Br 18 over Rapid Run carry?

About 50 vehicles per day (2023 count).

How long is T-400 Cty Br 18 over Rapid Run?

The structure is 46 ft (14 m) long with a longest span of 42 ft (12.8 m) and a deck 19 ft wide.

Who owns T-400 Cty Br 18 over Rapid Run?

It is owned by the County Highway Agency.