US Bridges

Decker Street over Bigby Creek

Fair

Somerset County, Pennsylvania · Garrett Boro Decker ST · Structure no. 000000000047985

Built
1923
102 years old
Condition
Fair
inspected June 2023
Type
Tee Beam
Concrete
Length
29 ft
1 main span
Daily traffic
100
2023 count
Owner
County
County Highway Agency

About this bridge

Decker Street over Bigby Creek is a concrete tee beam carrying Decker Street over Bigby Creek in Somerset County, Pennsylvania. It was built in 1923, so it is 102 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 2% of them trucks, projected to reach 101 by 2043. The structure is 29 ft (8.8 m) long and 18 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesDecker Street
CrossesBigby Creek
LocationGarrett Boro Decker ST
RouteCity Street 0
CountySomerset County
StatePennsylvania
Coordinates39.86012, -79.06552
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating83 US tons
Inventory rating50 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length29 ft (8.8 m)
Longest span27 ft (8.2 m)
Deck width18 ft (5.4 m)
Roadway width15 ft (4.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2023)
Projected traffic101 by 2043
Trucks2%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Decker Street over Bigby Creek built?

It was built in 1923, making it 102 years old in 2025.

What condition is Decker Street over Bigby 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 June 2023.

How much traffic does Decker Street over Bigby Creek carry?

About 100 vehicles per day (2023 count), of which roughly 2% are trucks.

How long is Decker Street over Bigby Creek?

The structure is 29 ft (8.8 m) long with a longest span of 27 ft (8.2 m) and a deck 18 ft wide.

Who owns Decker Street over Bigby Creek?

It is owned by the County Highway Agency.