US Bridges

Ri 12 Tunk Hill RD over Kent Dam Spillway

Fair

Providence County, Rhode Island · 0.8 MI W of JCT Ri 116 · Structure no. 000000000000840

Built
1921
104 years old
Condition
Fair
inspected October 2024
Type
Arch - Deck
Concrete
Length
199 ft
3 main spans
Daily traffic
3,605
2021 count
Owner
State
State Highway Agency

About this bridge

Ri 12 Tunk Hill RD over Kent Dam Spillway is a concrete arch - deck carrying Ri 12 Tunk Hill RD over Kent Dam Spillway in Providence County, Rhode Island. It was built in 1921, so it is 104 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 3,605 vehicles a day, roughly 12% of them trucks, projected to reach 3,966 by 2041. The structure is 199 ft (60.6 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRi 12 Tunk Hill RD
CrossesKent Dam Spillway
Location0.8 MI W of JCT Ri 116
RouteState Highway 12
CountyProvidence County
StateRhode Island
Coordinates41.75061, -71.58913
Functional classRural Minor 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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating67.5 US tons
Inventory rating46.4 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length199 ft (60.6 m)
Longest span64 ft (19.5 m)
Deck width31 ft (9.6 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,605 (2021)
Projected traffic3,966 by 2041
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

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$9.2 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Ri 12 Tunk Hill RD over Kent Dam Spillway built?

It was built in 1921, making it 104 years old in 2025.

What condition is Ri 12 Tunk Hill RD over Kent Dam Spillway 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 2024.

How much traffic does Ri 12 Tunk Hill RD over Kent Dam Spillway carry?

About 3,605 vehicles per day (2021 count), of which roughly 12% are trucks.

How long is Ri 12 Tunk Hill RD over Kent Dam Spillway?

The structure is 199 ft (60.6 m) long with a longest span of 64 ft (19.5 m) and a deck 31 ft wide.

Who owns Ri 12 Tunk Hill RD over Kent Dam Spillway?

It is owned by the State Highway Agency.