US Bridges

Plain RD over Flat River

GoodPosted for load

Washington County, Rhode Island · 0.5 MI W of JCT F Holl · Structure no. 000000000007850

Built
2013
12 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
500
2008 count
Owner
State
State Park, Forest, or Reservation Agency

About this bridge

Plain RD over Flat River is a steel stringer/multi-beam or girder carrying Plain RD over Flat River in Washington County, Rhode Island. It was built in 2013, so it is 12 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 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. Its operating status is: posted for load restriction.

It carries about 500 vehicles a day, roughly 10% of them trucks, projected to reach 600 by 2036. The structure is 38 ft (11.6 m) long and 16 ft wide. If it were closed, the detour would be 2.5 mi (4 km).

CarriesPlain RD
CrossesFlat River
Location0.5 MI W of JCT F Holl
RouteState Lands Road 0
Coordinates41.5956, -71.71991
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusPosted for load restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating23.3 US tons

Structure

MaterialSteel
DeckWood or timber
Main spans1
Design loadHS 20
Structure length38 ft (11.6 m)
Longest span35 ft (10.7 m)
Deck width16 ft (4.9 m)
Roadway width12 ft (3.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic500 (2008)
Projected traffic600 by 2036
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 Park, Forest, or Reservation Agency
Maintained byState Park, Forest, or Reservation Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$502,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Plain RD over Flat River built?

It was built in 2013, making it 12 years old in 2025.

What condition is Plain RD over Flat 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 August 2023.

How much traffic does Plain RD over Flat River carry?

About 500 vehicles per day (2008 count), of which roughly 10% are trucks.

How long is Plain RD over Flat River?

The structure is 38 ft (11.6 m) long with a longest span of 35 ft (10.7 m) and a deck 16 ft wide.

Who owns Plain RD over Flat River?

It is owned by the State Park, Forest, or Reservation Agency.