Structure 68695 · Franklin County, PA

US 11 Sb; N.main S over Falling Spring Branch

Carries US 11 Sb; N.main S over Falling Spring Branch, Chambersburg.

Overall conditionGood

Set by its lowest-rated component: Deck and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructure9/9 · Excellent
Substructuresets the rating8/9 · Very Good
Channelnot part of overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT26 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9 · sets the ratingSuperstructure 9/9Substructure 8/9 · sets the rating

26 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.

Built20215 years old
Length25.9 ft7.9 m
Daily traffic7,758counted 2024
Last inspectedMarch 2024every 24 months

Location

StatePennsylvania
CountyFranklin
LocationChambersburg
CarriesUS 11 Sb; N.main S
CrossesFalling Spring Branch
Coordinates39.93983, -77.66076

Physical Characteristics

MaterialPrestressed Concrete
DesignBox Beam - Multiple
Total Length25.9 ft (7.9 m)
Max Span24.9 ft (7.6 m)
Deck Width58.4 ft (17.8 m)
Deck Area140.6 sq m
Main Spans1
Year Built2021

Traffic

Avg Daily Traffic7,758 (2024)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical8 — Stable, low risk
Structure Number000000000068695

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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