US Bridges

Swift River RD over Swift River

Good

Oxford County, Maine · 7.7 MI Nly Roxbury T.L. · Structure no. 3546

Built
1993
32 years old
Condition
Good
inspected October 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
70 ft
1 main span
Daily traffic
402
2016 count
Owner
State
State Highway Agency

About this bridge

Swift River RD over Swift River is a steel stringer/multi-beam or girder carrying Swift River RD over Swift River in Oxford County, Maine. It was built in 1993, so it is 32 years old, younger than the Maine average of 53.7 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 402 vehicles a day, roughly 5% of them trucks, projected to reach 643 by 2036. The structure is 70 ft (21.2 m) long and 34 ft wide. If it were closed, the detour would be 36 mi (58 km).

CarriesSwift River RD
CrossesSwift River
Location7.7 MI Nly Roxbury T.L.
RouteState Highway 17
StateMaine
Coordinates44.78021, -70.64039
Functional classRural Major Collector

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.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.3 US tons
Inventory rating54.2 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length70 ft (21.2 m)
Longest span64 ft (19.5 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic402 (2016)
Projected traffic643 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Swift River RD over Swift River built?

It was built in 1993, making it 32 years old in 2025.

What condition is Swift River RD over Swift 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 October 2024.

How much traffic does Swift River RD over Swift River carry?

About 402 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Swift River RD over Swift River?

The structure is 70 ft (21.2 m) long with a longest span of 64 ft (19.5 m) and a deck 34 ft wide.

Who owns Swift River RD over Swift River?

It is owned by the State Highway Agency.