Structure 1780 · Washington County, RI

Ri 108 Kngstown RD over Saugatucket River

Carries Ri 108 Kngstown RD over Saugatucket River, 3.0 Mi S Of Jct Ri 138.

Overall conditionFair

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

How ratings work
Superstructuresets the rating6/9 · Satisfactory
Substructure7/9 · Good
Channelnot part of overall6/9 · Satisfactory
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
24 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck not ratedSuperstructure 6/9 · sets the ratingSubstructure 7/9

24 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.

Built1885rebuilt 1930
Length24.0 ft7.3 m
Daily traffic8,515counted 2021
Last inspectedAugust 2024every 24 months

Location

StateRhode Island
CountyWashington
Location3.0 Mi S Of Jct Ri 138
CarriesRi 108 Kngstown RD
CrossesSaugatucket River
Coordinates41.45177, -71.49665

Physical Characteristics

MaterialMasonry
DesignArch - Deck
Total Length24.0 ft (7.3 m)
Max Span24.0 ft (7.3 m)
Deck Width32.2 ft (9.8 m)
Deck Area71.5 sq m
Main Spans1
Year Built1885 (reconstructed 1930)

Traffic

Avg Daily Traffic8,515 (2021)
Truck Traffic7%
Lanes On Bridge2

Inspection & Ownership

Last InspectionAugust 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is on the National Register of Historic Places
Scour Critical5 — Stable for scour
Structure Number000000000001780

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.

Nearby Bridges