Structure 29330 · Northumberland County, PA

T-594 over Chillisquaque Creek

Carries T-594 over Chillisquaque Creek, East Of Pottsgrove.

Overall conditionPoor

Set by its lowest-rated component: Superstructure at 1 of 9.

How ratings work
Deck5/9 · Fair
Superstructuresets the rating1/9 · Imminent Failure
Substructure4/9 · Poor
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT79 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 5/9Superstructure 1/9 · sets the ratingSubstructure 4/9

79 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 through truss.

Built1881rebuilt 1985
Length79.1 ft24.1 m
Daily traffic100counted 2018
Last inspectedAugust 2023every 24 months

Location

StatePennsylvania
CountyNorthumberland
LocationEast Of Pottsgrove
CarriesT-594
CrossesChillisquaque Creek
Coordinates41.00204, -76.77365

Physical Characteristics

MaterialWood or Timber
DesignTruss - Thru
Total Length79.1 ft (24.1 m)
Max Span79.1 ft (24.1 m)
Deck Width16.7 ft (5.1 m)
Deck Area122.9 sq m
Main Spans1
Year Built1881 (reconstructed 1985)

Traffic

Avg Daily Traffic100 (2018)
Lanes On Bridge1

Inspection & Ownership

Last InspectionAugust 2023
Inspection FrequencyEvery 24 months
OwnerCounty Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical3 — Scour critical
Structure Number000000000029330

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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