Structure 7070 · Bucks County, PA

Doylestwn Bypas NB over Saw Mill Road(t401)

Carries Doylestwn Bypas NB over Saw Mill Road(t401), .4mi.s.lr 156 23a07.

Overall conditionFair

Set by its lowest-rated component: Substructure at 5 of 9.

How ratings work
Deck6/9 · Satisfactory
Superstructure6/9 · Satisfactory
Substructuresets the rating5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT178 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 5/9 · sets the rating

178 ft end to end, longest span 86 ft: about 2 semi-trucks nose to tail. 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.

Built197353 years old
Length178.1 ft54.3 m
Daily traffic6,995counted 2024
Last inspectedMarch 2024every 24 months

Location

StatePennsylvania
CountyBucks
Location.4mi.s.lr 156 23a07
CarriesDoylestwn Bypas NB
CrossesSaw Mill Road(t401)
Coordinates40.33788, -75.13404

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length178.1 ft (54.3 m)
Max Span86.0 ft (26.2 m)
Deck Width44.0 ft (13.4 m)
Deck Area727.6 sq m
Main Spans3
Year Built1973

Traffic

Avg Daily Traffic6,995 (2024)
Truck Traffic6%
Lanes On Bridge2
Lanes Under Bridge2

Inspection & Ownership

Last InspectionMarch 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour CriticalNot applicable
Structure Number000000000007070

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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