Structure 3414 · Armstrong County, PA

T-620 Lauster RD over Cowanshannock Creek

Carries T-620 Lauster RD over Cowanshannock Creek, 100 Feet South Of SR 0085.

Overall conditionFair

Set by its lowest-rated component: Deck and Superstructure at 5 of 9.

How ratings work
Decksets the rating5/9 · Fair
Superstructuresets the rating5/9 · Fair
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT44 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9 · sets the ratingSuperstructure 5/9 · sets the ratingSubstructure 7/9

44 ft end to end. Lengths and the car 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 box-beam bridge.

Built198244 years old
Length44.0 ft13.4 m
Daily traffic100counted 2021
Last inspectedApril 2023every 24 months

Location

StatePennsylvania
CountyArmstrong
Location100 Feet South Of SR 0085
CarriesT-620 Lauster RD
CrossesCowanshannock Creek
Coordinates40.80439, -79.38305

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length44.0 ft (13.4 m)
Max Span41.0 ft (12.5 m)
Deck Width20.3 ft (6.2 m)
Deck Area83.1 sq m
Main Spans1
Year Built1982

Traffic

Avg Daily Traffic100 (2021)
Truck Traffic9%
Lanes On Bridge2

Inspection & Ownership

Last InspectionApril 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical4 — Foundations need monitoring
Structure Number000000000003414

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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