Structure 100317002303171 · Caledonia County, VT

C3021 over Miller Run

Carries C3021 over Miller Run, 0.1 Mi Jct TH 21 + Vt122.

Overall conditionPoor

Set by its lowest-rated component: Substructure at 4 of 9.

How ratings work
Deck7/9 · Good
Superstructure7/9 · Good
Substructuresets the rating4/9 · Poor
Channelnot part of overall5/9 · Fair
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT46 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 7/9Superstructure 7/9Substructure 4/9 · sets the rating

46 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 multi-beam bridge.

Built1928rebuilt 1974
Length45.9 ft14 m
Daily traffic5counted 2019
Last inspectedSeptember 2023every 24 months

Location

StateVermont
CountyCaledonia
Location0.1 Mi Jct TH 21 + Vt122
CarriesC3021
CrossesMiller Run
Coordinates44.58697, -72.08521

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length45.9 ft (14 m)
Max Span43.0 ft (13.1 m)
Deck Width14.8 ft (4.5 m)
Deck Area63 sq m
Main Spans1
Year Built1928 (reconstructed 1974)

Traffic

Avg Daily Traffic5 (2019)
Truck Traffic2%
Lanes On Bridge1

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerTown/Township Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical3 — Scour critical
Structure Number100317002303171

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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