US Bridges

Five Islands RD over Back River

Good

Sagadahoc County, Maine · At Town Line · Structure no. 3016

Built
2009
16 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
407 ft
2 main spans
Daily traffic
2,330
2016 count
Owner
State
State Highway Agency

About this bridge

Five Islands RD over Back River is a steel continuous stringer/multi-beam or girder carrying Five Islands RD over Back River in Sagadahoc County, Maine. It was built in 2009, so it is 16 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,330 vehicles a day, roughly 5% of them trucks, projected to reach 3,262 by 2036. The structure is 407 ft (124.1 m) long and 35 ft wide. If it were closed, the detour would be 100 mi (161 km).

Location

Open in Google Maps
CarriesFive Islands RD
CrossesBack River
LocationAt Town Line
RouteCounty Highway 127
CountySagadahoc County
StateMaine
Coordinates43.85165, -69.77182
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length407 ft (124.1 m)
Longest span200 ft (61 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,330 (2016)
Projected traffic3,262 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusEligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Five Islands RD over Back River built?

It was built in 2009, making it 16 years old in 2025.

What condition is Five Islands RD over Back 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 July 2023.

How much traffic does Five Islands RD over Back River carry?

About 2,330 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Five Islands RD over Back River?

The structure is 407 ft (124.1 m) long with a longest span of 200 ft (61 m) and a deck 35 ft wide.

Who owns Five Islands RD over Back River?

It is owned by the State Highway Agency.