US Bridges

T-554 Eagle Mill over Littl Connoquenessing CR

Fair

Butler County, Pennsylvania · 1.3 MI NW of S.R. 68 · Structure no. 000000000008213

Built
1978
47 years old
Condition
Fair
inspected November 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
33 ft
1 main span
Daily traffic
750
2015 count
Owner
County
County Highway Agency

About this bridge

T-554 Eagle Mill over Littl Connoquenessing CR is a prestressed concrete box beam or girders - multiple carrying T-554 Eagle Mill over Littl Connoquenessing CR in Butler County, Pennsylvania. It was built in 1978, so it is 47 years old, younger 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 750 vehicles a day, roughly 9% of them trucks, projected to reach 800 by 2035. The structure is 33 ft (10.1 m) long and 31 ft wide. If it were closed, the detour would be 0.6 mi (1 km).

CarriesT-554 Eagle Mill
CrossesLittl Connoquenessing CR
Location1.3 MI NW of S.R. 68
RouteCity Street 0
Coordinates40.87154, -79.98369
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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating33 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length33 ft (10.1 m)
Longest span32 ft (9.8 m)
Deck width31 ft (9.6 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic750 (2015)
Projected traffic800 by 2035
Trucks9%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed0.6 mi (1 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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T-554 Eagle Mill over Littl Connoquenessing CR built?

It was built in 1978, making it 47 years old in 2025.

What condition is T-554 Eagle Mill over Littl Connoquenessing CR 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 November 2023.

How much traffic does T-554 Eagle Mill over Littl Connoquenessing CR carry?

About 750 vehicles per day (2015 count), of which roughly 9% are trucks.

How long is T-554 Eagle Mill over Littl Connoquenessing CR?

The structure is 33 ft (10.1 m) long with a longest span of 32 ft (9.8 m) and a deck 31 ft wide.

Who owns T-554 Eagle Mill over Littl Connoquenessing CR?

It is owned by the County Highway Agency.