US Bridges

T313 Walnut Grove over Sideling Hill Creek

Fair

Huntingdon County, Pennsylvania · 1 Mi.Nw.Of Maddensville · Structure no. 000000000018937

Built
1946
79 years old, rebuilt 2011
Condition
Fair
inspected November 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
173 ft
3 main spans
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

T313 Walnut Grove over Sideling Hill Creek is a steel stringer/multi-beam or girder carrying T313 Walnut Grove over Sideling Hill Creek in Huntingdon County, Pennsylvania. It was built in 1946 and reconstructed in 2011, so it is 79 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 110 by 2043. The structure is 173 ft (52.7 m) long and 23 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

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CarriesT313 Walnut Grove
CrossesSideling Hill Creek
Location1 Mi.Nw.Of Maddensville
RouteCity Street 0
CountyHuntingdon County
StatePennsylvania
Coordinates40.13386, -77.96482
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: 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 rating66.8 US tons
Inventory rating49.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length173 ft (52.7 m)
Longest span58 ft (17.7 m)
Deck width23 ft (6.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic110 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was T313 Walnut Grove over Sideling Hill Creek built?

It was built in 1946, making it 79 years old in 2025. It was reconstructed in 2011.

What condition is T313 Walnut Grove over Sideling Hill 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 November 2023.

How much traffic does T313 Walnut Grove over Sideling Hill Creek carry?

About 100 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is T313 Walnut Grove over Sideling Hill Creek?

The structure is 173 ft (52.7 m) long with a longest span of 58 ft (17.7 m) and a deck 23 ft wide.

Who owns T313 Walnut Grove over Sideling Hill Creek?

It is owned by the County Highway Agency.