US Bridges

Crottlestown RD over Back Creek

Fair

Franklin County, Pennsylvania · Twin Bridge RD Intersect · Structure no. 000000000017670

Built
1959
66 years old, rebuilt 2012
Condition
Fair
inspected May 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
50 ft
1 main span
Daily traffic
350
2010 count
Owner
County
County Highway Agency

About this bridge

Crottlestown RD over Back Creek is a prestressed concrete box beam or girders - multiple carrying Crottlestown RD over Back Creek in Franklin County, Pennsylvania. It was built in 1959 and reconstructed in 2012, so it is 66 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 350 vehicles a day, roughly 5% of them trucks, projected to reach 400 by 2030. The structure is 50 ft (15.2 m) long and 28 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCrottlestown RD
CrossesBack Creek
LocationTwin Bridge RD Intersect
RouteCity Street 0
CountyFranklin County
StatePennsylvania
Coordinates39.94601, -77.73924
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
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 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating62.2 US tons
Inventory rating38.9 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckNot applicable
Main spans1
Design loadHL 93
Structure length50 ft (15.2 m)
Longest span48 ft (14.6 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic350 (2010)
Projected traffic400 by 2030
Trucks5%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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$107,000
NavigationNo navigation control on waterway

Frequently asked questions

When was Crottlestown RD over Back Creek built?

It was built in 1959, making it 66 years old in 2025. It was reconstructed in 2012.

What condition is Crottlestown RD over Back 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 May 2024.

How much traffic does Crottlestown RD over Back Creek carry?

About 350 vehicles per day (2010 count), of which roughly 5% are trucks.

How long is Crottlestown RD over Back Creek?

The structure is 50 ft (15.2 m) long with a longest span of 48 ft (14.6 m) and a deck 28 ft wide.

Who owns Crottlestown RD over Back Creek?

It is owned by the County Highway Agency.