Structure 1029 · Fairfield County, CT

Route 59 over Mill River

Carries Route 59 over Mill River, 625 Ft N Of Route 15.

Overall conditionFair

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

How ratings work
Decksets the rating6/9 · Satisfactory
Superstructuresets the rating6/9 · Satisfactory
Substructuresets the rating6/9 · Satisfactory
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
CAR · 15 FT43 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

43 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.

Built193987 years old
Length42.7 ft13 m
Daily traffic10,800counted 2022
Last inspectedSeptember 2023every 24 months

Location

StateConnecticut
CountyFairfield
Location625 Ft N Of Route 15
CarriesRoute 59
CrossesMill River
Coordinates41.22219, -73.25568

Physical Characteristics

MaterialSteel
DesignStringer/Multi-beam
Total Length42.7 ft (13 m)
Max Span36.1 ft (11 m)
Deck Width50.2 ft (15.3 m)
Deck Area198.9 sq m
Main Spans1
Year Built1939

Traffic

Avg Daily Traffic10,800 (2022)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionSeptember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Scour Critical7 — Countermeasures installed
Structure Number01029

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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