Structure 27402 · Montgomery County, PA

Trinity Lane over Gulph Mills Creek

Carries Trinity Lane over Gulph Mills Creek, Gulph Mills 3367f10.

Overall conditionFair

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

How ratings work
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
22 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 7/9Substructure 6/9 · sets the rating

22 ft end to end. Lengths are drawn to scale; at this length a semi-truck would be a speck. 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 deck arch.

Built1789rebuilt 2021
Length22.0 ft6.7 m
Daily traffic5,486counted 2024
Last inspectedJanuary 2024every 24 months

Location

StatePennsylvania
CountyMontgomery
LocationGulph Mills 3367f10
CarriesTrinity Lane
CrossesGulph Mills Creek
Coordinates40.06892, -75.34058

Physical Characteristics

MaterialMasonry
DesignArch - Deck
Total Length22.0 ft (6.7 m)
Max Span20.0 ft (6.1 m)
Deck Width34.1 ft (10.4 m)
Deck Area69.7 sq m
Main Spans1
Year Built1789 (reconstructed 2021)

Traffic

Avg Daily Traffic5,486 (2024)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJanuary 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical7 — Countermeasures installed
Structure Number000000000027402

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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