US Bridges

Bridge ST over Kennebec River

Fair

Kennebec County, Maine · 0.2 MI E of RTE US 201 · Structure no. 3078

Built
1972
53 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
426 ft
5 main spans
Daily traffic
13,867
2016 count
Owner
State
State Highway Agency

About this bridge

Bridge ST over Kennebec River is a steel continuous stringer/multi-beam or girder carrying Bridge ST over Kennebec River in Kennebec County, Maine. It was built in 1972, so it is 53 years old, younger than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 13,867 vehicles a day, roughly 5% of them trucks, projected to reach 19,414 by 2036. The structure is 426 ft (129.8 m) long and 52 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesBridge ST
CrossesKennebec River
Location0.2 MI E of RTE US 201
RouteState Highway 0
CountyKennebec County
StateMaine
Coordinates44.31677, -69.77216
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating29.3 US tons
Inventory rating22.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans5
Design loadHS 20
Structure length426 ft (129.8 m)
Longest span92 ft (28 m)
Deck width52 ft (15.9 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,867 (2016)
Projected traffic19,414 by 2036
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Bridge ST over Kennebec River built?

It was built in 1972, making it 53 years old in 2025.

What condition is Bridge ST over Kennebec River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2024.

How much traffic does Bridge ST over Kennebec River carry?

About 13,867 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Bridge ST over Kennebec River?

The structure is 426 ft (129.8 m) long with a longest span of 92 ft (28 m) and a deck 52 ft wide.

Who owns Bridge ST over Kennebec River?

It is owned by the State Highway Agency.