US Bridges

US 1 Tower Hill RD over Annaquatucket River

Good

Washington County, Rhode Island · 1.2 MI N of JCT Ri 4 · Structure no. 000000000000180

Built
1917
108 years old, rebuilt 1975
Condition
Good
inspected September 2023
Type
Culvert
Concrete
Length
24 ft
2 main spans
Daily traffic
10,438
2021 count
Owner
State
State Highway Agency

About this bridge

US 1 Tower Hill RD over Annaquatucket River is a concrete culvert carrying US 1 Tower Hill RD over Annaquatucket River in Washington County, Rhode Island. It was built in 1917 and reconstructed in 1975, so it is 108 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 10,438 vehicles a day, roughly 5% of them trucks, projected to reach 11,482 by 2041. The structure is 24 ft (7.4 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesUS 1 Tower Hill RD
CrossesAnnaquatucket River
Location1.2 MI N of JCT Ri 4
RouteU.S. Route 1
Coordinates41.5568, -71.46477
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating107.1 US tons
Inventory rating107.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHS 20
Structure length24 ft (7.4 m)
Longest span11 ft (3.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,438 (2021)
Projected traffic11,482 by 2041
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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$1.6 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was US 1 Tower Hill RD over Annaquatucket River built?

It was built in 1917, making it 108 years old in 2025. It was reconstructed in 1975.

What condition is US 1 Tower Hill RD over Annaquatucket River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does US 1 Tower Hill RD over Annaquatucket River carry?

About 10,438 vehicles per day (2021 count), of which roughly 5% are trucks.

How long is US 1 Tower Hill RD over Annaquatucket River?

The structure is 24 ft (7.4 m) long with a longest span of 11 ft (3.5 m).

Who owns US 1 Tower Hill RD over Annaquatucket River?

It is owned by the State Highway Agency.