US Bridges

T-389 Cty Br # 07 over Black Run

Fair

Union County, Pennsylvania · 0.8 Mi. NW of Mazeppa · Structure no. 000000000033579

Built
1936
89 years old, rebuilt 2003
Condition
Fair
inspected April 2023
Type
Girder and Floorbeam System
Steel
Length
47 ft
1 main span
Daily traffic
228
2023 count
Owner
County
County Highway Agency

About this bridge

T-389 Cty Br # 07 over Black Run is a steel girder and floorbeam system carrying T-389 Cty Br # 07 over Black Run in Union County, Pennsylvania. It was built in 1936 and reconstructed in 2003, so it is 89 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 228 vehicles a day, roughly 1% of them trucks, projected to reach 352 by 2045. The structure is 47 ft (14.3 m) long and 17 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesT-389 Cty Br # 07
CrossesBlack Run
Location0.8 Mi. NW of Mazeppa
RouteCity Street 0
CountyUnion County
StatePennsylvania
Coordinates40.99482, -76.99365
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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: 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 rating45 US tons
Inventory rating27 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span43 ft (13.1 m)
Deck width17 ft (5.2 m)
Roadway width16 ft (4.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic228 (2023)
Projected traffic352 by 2045
Trucks1%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$119,000
NavigationNo navigation control on waterway

Frequently asked questions

When was T-389 Cty Br # 07 over Black Run built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2003.

What condition is T-389 Cty Br # 07 over Black 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 April 2023.

How much traffic does T-389 Cty Br # 07 over Black Run carry?

About 228 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is T-389 Cty Br # 07 over Black Run?

The structure is 47 ft (14.3 m) long with a longest span of 43 ft (13.1 m) and a deck 17 ft wide.

Who owns T-389 Cty Br # 07 over Black Run?

It is owned by the County Highway Agency.