US Bridges

SR4007 over Patterson Creek

Fair

Armstrong County, Pennsylvania · Frogtown NO.2 · Structure no. 000000000003311

Built
1933
92 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Concrete
Length
26 ft
1 main span
Daily traffic
143
2024 count
Owner
State
State Highway Agency

About this bridge

SR4007 over Patterson Creek is a concrete tee beam carrying SR4007 over Patterson Creek in Armstrong County, Pennsylvania. It was built in 1933, so it is 92 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 143 vehicles a day, roughly 4% of them trucks, projected to reach 319 by 2032. The structure is 26 ft (7.9 m) long and 26 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesSR4007
CrossesPatterson Creek
LocationFrogtown NO.2
RouteState Highway 0
CountyArmstrong County
StatePennsylvania
Coordinates40.93992, -79.66068
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic143 (2024)
Projected traffic319 by 2032
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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$243,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR4007 over Patterson Creek built?

It was built in 1933, making it 92 years old in 2025.

What condition is SR4007 over Patterson 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 December 2024.

How much traffic does SR4007 over Patterson Creek carry?

About 143 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is SR4007 over Patterson Creek?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 26 ft wide.

Who owns SR4007 over Patterson Creek?

It is owned by the State Highway Agency.