US Bridges

Irwin Herminie Rd. over Little Sewickley Creek

Fair

Westmoreland County, Pennsylvania · 250 N of Railroad Street · Structure no. 000000000036965

Built
1991
34 years old
Condition
Fair
inspected June 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
47 ft
1 main span
Daily traffic
7,200
2022 count
Owner
County
County Highway Agency

About this bridge

Irwin Herminie Rd. over Little Sewickley Creek is a prestressed concrete box beam or girders - multiple carrying Irwin Herminie Rd. over Little Sewickley Creek in Westmoreland County, Pennsylvania. It was built in 1991, so it is 34 years old, younger 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 7,200 vehicles a day, roughly 15% of them trucks, projected to reach 9,000 by 2042. The structure is 47 ft (14.3 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesIrwin Herminie Rd.
CrossesLittle Sewickley Creek
Location250 N of Railroad Street
RouteCounty Highway 0
Coordinates40.26577, -79.71903
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating71 US tons
Inventory rating25 US tons

Structure

MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length47 ft (14.3 m)
Longest span45 ft (13.7 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,200 (2022)
Projected traffic9,000 by 2042
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Irwin Herminie Rd. over Little Sewickley Creek built?

It was built in 1991, making it 34 years old in 2025.

What condition is Irwin Herminie Rd. over Little Sewickley 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 2024.

How much traffic does Irwin Herminie Rd. over Little Sewickley Creek carry?

About 7,200 vehicles per day (2022 count), of which roughly 15% are trucks.

How long is Irwin Herminie Rd. over Little Sewickley Creek?

The structure is 47 ft (14.3 m) long with a longest span of 45 ft (13.7 m) and a deck 36 ft wide.

Who owns Irwin Herminie Rd. over Little Sewickley Creek?

It is owned by the County Highway Agency.