US Bridges

SR 1046 over Mill Creek

Fair

Westmoreland County, Pennsylvania · LIG0NIER Borough · Structure no. 000000000036434

Built
1929
96 years old
Condition
Fair
inspected December 2021
Type
Stringer/Multi-beam or Girder
Concrete Continuous
Length
57 ft
1 main span
Daily traffic
5,460
2024 count
Owner
State
State Highway Agency

About this bridge

SR 1046 over Mill Creek is a concrete continuous stringer/multi-beam or girder carrying SR 1046 over Mill Creek in Westmoreland County, Pennsylvania. It was built in 1929, so it is 96 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 5,460 vehicles a day, roughly 8% of them trucks, projected to reach 3,902 by 2032. The structure is 57 ft (17.4 m) long and 29 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesSR 1046
CrossesMill Creek
LocationLIG0NIER Borough
RouteState Highway 0
CountyWestmoreland County
StatePennsylvania
Coordinates40.24879, -79.24668
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 protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2021
Inspection intervalevery 48 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating105.1 US tons
Inventory rating63.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length57 ft (17.4 m)
Longest span46 ft (14 m)
Deck width29 ft (8.9 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,460 (2024)
Projected traffic3,902 by 2032
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$797,000
NavigationNo navigation control on waterway

Frequently asked questions

When was SR 1046 over Mill Creek built?

It was built in 1929, making it 96 years old in 2025.

What condition is SR 1046 over Mill 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 2021.

How much traffic does SR 1046 over Mill Creek carry?

About 5,460 vehicles per day (2024 count), of which roughly 8% are trucks.

How long is SR 1046 over Mill Creek?

The structure is 57 ft (17.4 m) long with a longest span of 46 ft (14 m) and a deck 29 ft wide.

Who owns SR 1046 over Mill Creek?

It is owned by the State Highway Agency.