US Bridges

Tie Line Road over Swamp Run

Good

Mercer County, Pennsylvania · 3/4-MI S of Enterprise RD · Structure no. 000000000026225

Built
1968
57 years old, rebuilt 2023
Condition
Good
inspected October 2023
Type
Other
Steel
Length
39 ft
1 main span
Daily traffic
561
2023 count
Owner
County
County Highway Agency

About this bridge

Tie Line Road over Swamp Run is a steel other carrying Tie Line Road over Swamp Run in Mercer County, Pennsylvania. It was built in 1968 and reconstructed in 2023, so it is 57 years old, older than the Pennsylvania average of 54.8 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 561 vehicles a day, roughly 4% of them trucks, projected to reach 660 by 2039. The structure is 39 ft (11.9 m) long and 27 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesTie Line Road
CrossesSwamp Run
Location3/4-MI S of Enterprise RD
RouteCity Street 7219
CountyMercer County
StatePennsylvania
Coordinates41.15443, -80.03396
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating110.1 US tons
Inventory rating86 US tons

Structure

Structure typeOther
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length39 ft (11.9 m)
Longest span38 ft (11.6 m)
Deck width27 ft (8.2 m)
Roadway width24 ft (7.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic561 (2023)
Projected traffic660 by 2039
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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$1.2 million
NavigationNo navigation control on waterway

Frequently asked questions

When was Tie Line Road over Swamp Run built?

It was built in 1968, making it 57 years old in 2025. It was reconstructed in 2023.

What condition is Tie Line Road over Swamp Run in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in October 2023.

How much traffic does Tie Line Road over Swamp Run carry?

About 561 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Tie Line Road over Swamp Run?

The structure is 39 ft (11.9 m) long with a longest span of 38 ft (11.6 m) and a deck 27 ft wide.

Who owns Tie Line Road over Swamp Run?

It is owned by the County Highway Agency.