US Bridges

Reservoir RD over Diamond Hill Reservoir

Fair

Providence County, Rhode Island · 0.8 MI E of JCT Ri 114 · Structure no. 000000000001810

Built
1980
45 years old
Condition
Fair
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
88 ft
1 main span
Daily traffic
875
2021 count
Owner
Local
Other Local Agency

About this bridge

Reservoir RD over Diamond Hill Reservoir is a steel stringer/multi-beam or girder carrying Reservoir RD over Diamond Hill Reservoir in Providence County, Rhode Island. It was built in 1980, so it is 45 years old, younger 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 875 vehicles a day, roughly 11% of them trucks, projected to reach 963 by 2041. The structure is 88 ft (26.9 m) long and 37 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

Location

Open in Google Maps
CarriesReservoir RD
CrossesDiamond Hill Reservoir
Location0.8 MI E of JCT Ri 114
RouteCity Street 0
CountyProvidence County
StateRhode Island
Coordinates41.98943, -71.39675
Functional classUrban Local

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 above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50.7 US tons
Inventory rating38.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length88 ft (26.9 m)
Longest span88 ft (26.9 m)
Deck width37 ft (11.3 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic875 (2021)
Projected traffic963 by 2041
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed2.5 mi (4 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerOther Local Agency
Maintained byOther Local Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$4.8 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Reservoir RD over Diamond Hill Reservoir built?

It was built in 1980, making it 45 years old in 2025.

What condition is Reservoir RD over Diamond Hill 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 2024.

How much traffic does Reservoir RD over Diamond Hill Reservoir carry?

About 875 vehicles per day (2021 count), of which roughly 11% are trucks.

How long is Reservoir RD over Diamond Hill Reservoir?

The structure is 88 ft (26.9 m) long with a longest span of 88 ft (26.9 m) and a deck 37 ft wide.

Who owns Reservoir RD over Diamond Hill Reservoir?

It is owned by the Other Local Agency.