US Bridges

T-347 (cty Br 15) over N. Branch Buffalo Creek

Fair

Union County, Pennsylvania · 1.1 MI Nne of Mifflinburg · Structure no. 000000000033600

Built
1934
91 years old, rebuilt 2021
Condition
Fair
inspected March 2023
Type
Girder and Floorbeam System
Steel
Length
78 ft
1 main span
Daily traffic
110
2023 count
Owner
County
County Highway Agency

About this bridge

T-347 (cty Br 15) over N. Branch Buffalo Creek is a steel girder and floorbeam system carrying T-347 (cty Br 15) over N. Branch Buffalo Creek in Union County, Pennsylvania. It was built in 1934 and reconstructed in 2021, so it is 91 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 110 vehicles a day, roughly 1% of them trucks, projected to reach 170 by 2045. The structure is 78 ft (23.8 m) long and 22 ft wide.

Location

Open in Google Maps
CarriesT-347 (cty Br 15)
CrossesN. Branch Buffalo Creek
Location1.1 MI Nne of Mifflinburg
RouteCity Street 0
CountyUnion County
StatePennsylvania
Coordinates40.9324, -77.03736
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
Deck8 Very GoodNo problems noted.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
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
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66 US tons
Inventory rating40 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length78 ft (23.8 m)
Longest span72 ft (21.9 m)
Deck width22 ft (6.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic110 (2023)
Projected traffic170 by 2045
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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$124,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-347 (cty Br 15) over N. Branch Buffalo Creek built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 2021.

What condition is T-347 (cty Br 15) over N. Branch Buffalo Creek 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-347 (cty Br 15) over N. Branch Buffalo Creek carry?

About 110 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is T-347 (cty Br 15) over N. Branch Buffalo Creek?

The structure is 78 ft (23.8 m) long with a longest span of 72 ft (21.9 m) and a deck 22 ft wide.

Who owns T-347 (cty Br 15) over N. Branch Buffalo Creek?

It is owned by the County Highway Agency.