US Bridges

Bowdoin ST over Mill Stream

Fair

Kennebec County, Maine · 0.2 MI E JCT Main ST · Structure no. 5442

Built
1961
64 years old
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
1,331
2016 count
Owner
State
State Highway Agency

About this bridge

Bowdoin ST over Mill Stream is a concrete slab carrying Bowdoin ST over Mill Stream in Kennebec County, Maine. It was built in 1961, so it is 64 years old, older 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 5 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 1,331 vehicles a day, roughly 5% of them trucks, projected to reach 1,997 by 2036. The structure is 23 ft (7 m) long and 30 ft wide.

Location

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CarriesBowdoin ST
CrossesMill Stream
Location0.2 MI E JCT Main ST
RouteCity Street 0
CountyKennebec County
StateMaine
Coordinates44.30974, -69.97257
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating41.8 US tons
Inventory rating32.2 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width30 ft (9.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,331 (2016)
Projected traffic1,997 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Bowdoin ST over Mill Stream built?

It was built in 1961, making it 64 years old in 2025.

What condition is Bowdoin ST over Mill Stream 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 October 2023.

How much traffic does Bowdoin ST over Mill Stream carry?

About 1,331 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Bowdoin ST over Mill Stream?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 30 ft wide.

Who owns Bowdoin ST over Mill Stream?

It is owned by the State Highway Agency.