Structure B2300392BDOTNBI · Plymouth County, MA

ST 18 Bedford ST over Water Taunton River

Carries ST 18 Bedford ST over Water Taunton River, 0.5 M. N. Of Plymouth St..

Overall conditionGood

Set by its lowest-rated component: Deck and Superstructure and Substructure at 8 of 9.

How ratings work
Decksets the rating8/9 · Very Good
Superstructuresets the rating8/9 · Very Good
Substructuresets the rating8/9 · Very Good
Channelnot part of overall7/9 · Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT152 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 8/9Superstructure 8/9Substructure 8/9

152 ft end to end, longest span 74 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.

Built200719 years old
Length151.9 ft46.3 m
Daily traffic23,017counted 2024
Last inspectedJuly 2024every 24 months

Location

StateMassachusetts
CountyPlymouth
Location0.5 M. N. Of Plymouth St.
CarriesST 18 Bedford ST
CrossesWater Taunton River
Coordinates41.93675, -70.96565

Physical Characteristics

MaterialSteel Continuous
DesignStringer/Multi-beam
Total Length151.9 ft (46.3 m)
Max Span73.8 ft (22.5 m)
Deck Width49.5 ft (15.1 m)
Deck Area699.1 sq m
Main Spans2
Year Built2007

Traffic

Avg Daily Traffic23,017 (2024)
Truck Traffic6%
Lanes On Bridge2

Inspection & Ownership

Last InspectionJuly 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical8 — Stable, low risk
Structure NumberB2300392BDOTNBI

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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