US Bridges

Boyle Road over Flat Run

FairPosted for load

Adams County, Pennsylvania · 4.5 Mi.Se of Fairfield · Structure no. 000000000000450

Built
1941
84 years old
Condition
Fair
inspected May 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
200
2018 count
Owner
County
County Highway Agency

About this bridge

Boyle Road over Flat Run is a steel stringer/multi-beam or girder carrying Boyle Road over Flat Run in Adams County, Pennsylvania. It was built in 1941, so it is 84 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. Its operating status is: posted for load restriction.

It carries about 200 vehicles a day, roughly 1% of them trucks, projected to reach 240 by 2038. The structure is 70 ft (21.3 m) long and 23 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesBoyle Road
CrossesFlat Run
Location4.5 Mi.Se of Fairfield
RouteCity Street 0
CountyAdams County
StatePennsylvania
Coordinates39.72639, -77.33489
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.
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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionMay 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating27 US tons
Inventory rating16 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length70 ft (21.3 m)
Longest span64 ft (19.5 m)
Deck width23 ft (7 m)
Roadway width19 ft (5.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2018)
Projected traffic240 by 2038
Trucks1%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Boyle Road over Flat Run built?

It was built in 1941, making it 84 years old in 2025.

What condition is Boyle Road over Flat 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 May 2023.

How much traffic does Boyle Road over Flat Run carry?

About 200 vehicles per day (2018 count), of which roughly 1% are trucks.

How long is Boyle Road over Flat Run?

The structure is 70 ft (21.3 m) long with a longest span of 64 ft (19.5 m) and a deck 23 ft wide.

Who owns Boyle Road over Flat Run?

It is owned by the County Highway Agency.