US Bridges

Main ST over Twelve Mile Stream

Good

Kennebec County, Maine · 0.9 MI N of Benton · Structure no. 2117

Built
2016
9 years old
Condition
Good
inspected October 2024
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
62 ft
1 main span
Daily traffic
6,509
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Twelve Mile Stream is a prestressed concrete box beam or girders - multiple carrying Main ST over Twelve Mile Stream in Kennebec County, Maine. It was built in 2016, so it is 9 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 6,509 vehicles a day, roughly 5% of them trucks, projected to reach 9,113 by 2036. The structure is 62 ft (18.9 m) long and 38 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesMain ST
CrossesTwelve Mile Stream
Location0.9 MI N of Benton
RouteState Highway 11
StateMaine
Coordinates44.63627, -69.50491
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.7 US tons
Inventory rating43.2 US tons

Structure

MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length62 ft (18.9 m)
Longest span59 ft (18 m)
Deck width38 ft (11.6 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,509 (2016)
Projected traffic9,113 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.3 mi (23 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over Twelve Mile Stream built?

It was built in 2016, making it 9 years old in 2025.

What condition is Main ST over Twelve Mile Stream 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 Main ST over Twelve Mile Stream carry?

About 6,509 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Twelve Mile Stream?

The structure is 62 ft (18.9 m) long with a longest span of 59 ft (18 m) and a deck 38 ft wide.

Who owns Main ST over Twelve Mile Stream?

It is owned by the State Highway Agency.