US Bridges

Main ST over Mill Canal

Poor

Somerset County, Maine · 200 Ft E of 201A/DEN Riv · Structure no. 2122

Built
1931
94 years old
Condition
Poor
inspected April 2024
Type
Frame
Concrete
Length
40 ft
1 main span
Daily traffic
7,854
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Mill Canal is a concrete frame carrying Main ST over Mill Canal in Somerset County, Maine. It was built in 1931, so it is 94 years old, older than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 3 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 7,854 vehicles a day, roughly 5% of them trucks, projected to reach 10,996 by 2036. The structure is 40 ft (12.2 m) long and 50 ft wide. If it were closed, the detour would be 41 mi (66 km).

Location

Open in Google Maps
CarriesMain ST
CrossesMill Canal
Location200 Ft E of 201A/DEN Riv
RouteState Highway 201
CountySomerset County
StateMaine
Coordinates44.79833, -69.88681
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Superstructure3 SeriousLoss of section, deterioration, spalling or scour have seriously affected primary structural components.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation3: Basically intolerable, requiring high priority of corrective action
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 rating44.6 US tons
Inventory rating34.6 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length40 ft (12.2 m)
Longest span30 ft (9.1 m)
Deck width50 ft (15.1 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,854 (2016)
Projected traffic10,996 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed41 mi (66 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Main ST over Mill Canal built?

It was built in 1931, making it 94 years old in 2025.

What condition is Main ST over Mill Canal in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.

How much traffic does Main ST over Mill Canal carry?

About 7,854 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Mill Canal?

The structure is 40 ft (12.2 m) long with a longest span of 30 ft (9.1 m) and a deck 50 ft wide.

Who owns Main ST over Mill Canal?

It is owned by the State Highway Agency.