Structure 4852 · Washington County, RI

US 1 SB Post RD over Silver Spring Cove

Carries US 1 SB Post RD over Silver Spring Cove, 1.0 Mi S Of Jct Ri 108.

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 overall8/9 · Very Good
0 failed4 poor6 fair9 excellent

Elevation

Side view, colored by inspection rating
SEMI-TRUCK · 72 FT138 FT OVERALL25 FT0ELEVATION · LENGTHS TO SCALE
Deck 6/9Superstructure 6/9Substructure 6/9

138 ft end to end. 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.

Built196363 years old
Length138.1 ft42.1 m
Daily traffic11,243counted 2008
Last inspectedOctober 2024every 24 months

Location

StateRhode Island
CountyWashington
Location1.0 Mi S Of Jct Ri 108
CarriesUS 1 SB Post RD
CrossesSilver Spring Cove
Coordinates41.42860, -71.49894

Physical Characteristics

MaterialPrestressed Concrete
DesignStringer/Multi-beam
Total Length138.1 ft (42.1 m)
Max Span58.7 ft (17.9 m)
Deck Width44.0 ft (13.4 m)
Deck Area564.1 sq m
Main Spans1
Year Built1963

Traffic

Avg Daily Traffic11,243 (2008)
Truck Traffic10%
Lanes On Bridge2

Inspection & Ownership

Last InspectionOctober 2024
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceHistorical significance is not determined
Scour Critical5 — Stable for scour
Structure Number000000000004852

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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