Structure 35966 · Westmoreland County, PA

SR 0030 over Mill Creek

Carries SR 0030 over Mill Creek, Ligonier Township.

Overall conditionFair

Set by its lowest-rated component: Substructure at 6 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT125 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 6/9 · sets the rating

125 ft end to end, longest span 58 ft. Lengths and the semi-truck on the deck are drawn to the same scale. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.

Built1955rebuilt 2003
Length125.0 ft38.1 m
Daily traffic5,393counted 2023
Last inspectedApril 2021every 48 months

Location

StatePennsylvania
CountyWestmoreland
LocationLigonier Township
CarriesSR 0030
CrossesMill Creek
Coordinates40.24826, -79.24882

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length125.0 ft (38.1 m)
Max Span58.1 ft (17.7 m)
Deck Width41.3 ft (12.6 m)
Deck Area480.1 sq m
Main Spans2
Year Built1955 (reconstructed 2003)

Traffic

Avg Daily Traffic5,393 (2023)
Truck Traffic13%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2021
Inspection FrequencyEvery 48 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000035966

How Bridge Ratings Work

Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."

0Failed
1Imminent failure
2Critical
3Serious
4Poor
5Fair
6Satisfactory
7Good
8Very good
9Excellent
Good · lowest component 7–9
Fair · lowest component 5–6
Poor · lowest component 0–4

A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.

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