US Bridges

Main ST over Mill Creek

Fair

Knox County, Maine · 100 Ft W of JCT RTE 131 · Structure no. 2562

Built
1924
101 years old, rebuilt 1962
Condition
Fair
inspected August 2024
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
16,917
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Mill Creek is a concrete culvert carrying Main ST over Mill Creek in Knox County, Maine. It was built in 1924 and reconstructed in 1962, so it is 101 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 16,917 vehicles a day, roughly 5% of them trucks, projected to reach 23,684 by 2036. The structure is 28 ft (8.5 m) long. If it were closed, the detour would be 26.1 mi (42 km).

Location

Open in Google Maps
CarriesMain ST
CrossesMill Creek
Location100 Ft W of JCT RTE 131
RouteState Highway 1
CountyKnox County
StateMaine
Coordinates44.08153, -69.17038
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

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

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 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
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating33.6 US tons
Inventory rating25.7 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length28 ft (8.5 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,917 (2016)
Projected traffic23,684 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed26.1 mi (42 km)
TollOn a free road
National Highway SystemYes

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 Mill Creek built?

It was built in 1924, making it 101 years old in 2025. It was reconstructed in 1962.

What condition is Main ST over Mill Creek 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 August 2024.

How much traffic does Main ST over Mill Creek carry?

About 16,917 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Mill Creek?

The structure is 28 ft (8.5 m) long with a longest span of 22 ft (6.7 m).

Who owns Main ST over Mill Creek?

It is owned by the State Highway Agency.