US Bridges

Ri 117 Flat Rvr RD over Flat River Reservoir

Fair

Kent County, Rhode Island · 4.1MI E of JCT Ri 102 · Structure no. 000000000000710

Built
1954
71 years old
Condition
Fair
inspected October 2023
Type
Arch - Deck
Concrete
Length
40 ft
1 main span
Daily traffic
4,730
2021 count
Owner
State
State Highway Agency

About this bridge

Ri 117 Flat Rvr RD over Flat River Reservoir is a concrete arch - deck carrying Ri 117 Flat Rvr RD over Flat River Reservoir in Kent County, Rhode Island. It was built in 1954, so it is 71 years old, older than the Rhode Island average of 54.5 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,730 vehicles a day, roughly 13% of them trucks, projected to reach 5,203 by 2041. The structure is 40 ft (12.2 m) long and 56 ft wide. If it were closed, the detour would be 4.3 mi (7 km).

Location

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CarriesRi 117 Flat Rvr RD
CrossesFlat River Reservoir
Location4.1MI E of JCT Ri 102
RouteState Highway 117
CountyKent County
StateRhode Island
Coordinates41.70365, -71.62846
Functional classUrban Other Principal Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating41.1 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span40 ft (12.2 m)
Deck width56 ft (17.2 m)
Roadway width47 ft (14.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,730 (2021)
Projected traffic5,203 by 2041
Trucks13%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed4.3 mi (7 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$3.3 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ri 117 Flat Rvr RD over Flat River Reservoir built?

It was built in 1954, making it 71 years old in 2025.

What condition is Ri 117 Flat Rvr RD over Flat River Reservoir in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2023.

How much traffic does Ri 117 Flat Rvr RD over Flat River Reservoir carry?

About 4,730 vehicles per day (2021 count), of which roughly 13% are trucks.

How long is Ri 117 Flat Rvr RD over Flat River Reservoir?

The structure is 40 ft (12.2 m) long with a longest span of 40 ft (12.2 m) and a deck 56 ft wide.

Who owns Ri 117 Flat Rvr RD over Flat River Reservoir?

It is owned by the State Highway Agency.