US Bridges

Riverside DR over Seven Mile Brook

Fair

Kennebec County, Maine · 1.4 MI N Townline · Structure no. 3657

Built
1939
86 years old, rebuilt 1993
Condition
Fair
inspected October 2023
Type
Girder and Floorbeam System
Steel Continuous
Length
265 ft
3 main spans
Daily traffic
5,527
2016 count
Owner
State
State Highway Agency

About this bridge

Riverside DR over Seven Mile Brook is a steel continuous girder and floorbeam system carrying Riverside DR over Seven Mile Brook in Kennebec County, Maine. It was built in 1939 and reconstructed in 1993, so it is 86 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 5,527 vehicles a day, roughly 5% of them trucks, projected to reach 7,738 by 2036. The structure is 265 ft (80.8 m) long and 34 ft wide. If it were closed, the detour would be 29.8 mi (48 km).

Location

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CarriesRiverside DR
CrossesSeven Mile Brook
Location1.4 MI N Townline
RouteState Highway 201
CountyKennebec County
StateMaine
Coordinates44.39477, -69.71097
Functional classRural 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.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
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 adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating31.4 US tons
Inventory rating24.3 US tons

Structure

Structure typeGirder and Floorbeam System
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length265 ft (80.8 m)
Longest span120 ft (36.6 m)
Deck width34 ft (10.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,527 (2016)
Projected traffic7,738 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed29.8 mi (48 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

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

Frequently asked questions

When was Riverside DR over Seven Mile Brook built?

It was built in 1939, making it 86 years old in 2025. It was reconstructed in 1993.

What condition is Riverside DR over Seven Mile Brook 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 Riverside DR over Seven Mile Brook carry?

About 5,527 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Riverside DR over Seven Mile Brook?

The structure is 265 ft (80.8 m) long with a longest span of 120 ft (36.6 m) and a deck 34 ft wide.

Who owns Riverside DR over Seven Mile Brook?

It is owned by the State Highway Agency.