US Bridges

Colt Drive over Mill Gut Tidal Inlet

PoorPosted for load

Bristol County, Rhode Island · 1.3 MI W of JCT Ri 114 · Structure no. 000000000007240

Built
1967
58 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
93 ft
1 main span
Daily traffic
2,700
2008 count
Owner
State
State Highway Agency

About this bridge

Colt Drive over Mill Gut Tidal Inlet is a prestressed concrete stringer/multi-beam or girder carrying Colt Drive over Mill Gut Tidal Inlet in Bristol County, Rhode Island. It was built in 1967, so it is 58 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 poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: posted for load restriction.

It carries about 2,700 vehicles a day, roughly 10% of them trucks, projected to reach 3,240 by 2036. The structure is 93 ft (28.2 m) long and 37 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesColt Drive
CrossesMill Gut Tidal Inlet
Location1.3 MI W of JCT Ri 114
RouteCity Street 0
Coordinates41.68179, -71.29909
Functional classUrban Local

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 12 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating15.3 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length93 ft (28.2 m)
Longest span88 ft (26.8 m)
Deck width37 ft (11.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,700 (2008)
Projected traffic3,240 by 2036
Trucks10%
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

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$5 million (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Colt Drive over Mill Gut Tidal Inlet built?

It was built in 1967, making it 58 years old in 2025.

What condition is Colt Drive over Mill Gut Tidal Inlet in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Colt Drive over Mill Gut Tidal Inlet carry?

About 2,700 vehicles per day (2008 count), of which roughly 10% are trucks.

How long is Colt Drive over Mill Gut Tidal Inlet?

The structure is 93 ft (28.2 m) long with a longest span of 88 ft (26.8 m) and a deck 37 ft wide.

Who owns Colt Drive over Mill Gut Tidal Inlet?

It is owned by the State Highway Agency.