US Bridges

Pa 16; Main St. over Steigers Run

Fair

Franklin County, Pennsylvania · Mercersburg · Structure no. 000000000017296

Built
1941
84 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Concrete
Length
33 ft
1 main span
Daily traffic
8,813
2023 count
Owner
State
State Highway Agency

About this bridge

Pa 16; Main St. over Steigers Run is a concrete tee beam carrying Pa 16; Main St. over Steigers Run in Franklin 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.

It carries about 8,813 vehicles a day, roughly 5% of them trucks, projected to reach 12,201 by 2035. The structure is 33 ft (10.1 m) long and 47 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesPa 16; Main St.
CrossesSteigers Run
LocationMercersburg
RouteState Highway 16
CountyFranklin County
StatePennsylvania
Coordinates39.83066, -77.90388
Functional classRural Minor Arterial

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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68 US tons
Inventory rating41 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length33 ft (10.1 m)
Longest span30 ft (9.1 m)
Deck width47 ft (14.4 m)
Roadway width42 ft (12.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,813 (2023)
Projected traffic12,201 by 2035
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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$203,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Pa 16; Main St. over Steigers Run built?

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

What condition is Pa 16; Main St. over Steigers 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 December 2023.

How much traffic does Pa 16; Main St. over Steigers Run carry?

About 8,813 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Pa 16; Main St. over Steigers Run?

The structure is 33 ft (10.1 m) long with a longest span of 30 ft (9.1 m) and a deck 47 ft wide.

Who owns Pa 16; Main St. over Steigers Run?

It is owned by the State Highway Agency.