US Bridges

Swan Lake Av over Marsh Stream

Fair

Waldo County, Maine · .8 MI N Townline · Structure no. 3988

Built
1948
77 years old
Condition
Fair
inspected December 2023
Type
Tee Beam
Concrete
Length
64 ft
1 main span
Daily traffic
1,209
2016 count
Owner
State
State Highway Agency

About this bridge

Swan Lake Av over Marsh Stream is a concrete tee beam carrying Swan Lake Av over Marsh Stream in Waldo County, Maine. It was built in 1948, so it is 77 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 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 1,209 vehicles a day, roughly 5% of them trucks, projected to reach 1,814 by 2036. The structure is 64 ft (19.4 m) long and 26 ft wide. If it were closed, the detour would be 21.7 mi (35 km).

Location

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CarriesSwan Lake Av
CrossesMarsh Stream
Location.8 MI N Townline
RouteCounty Highway 141
CountyWaldo County
StateMaine
Coordinates44.57806, -69.00637
Functional classRural Minor Collector

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating50 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length64 ft (19.4 m)
Longest span60 ft (18.3 m)
Deck width26 ft (7.8 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,209 (2016)
Projected traffic1,814 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.7 mi (35 km)
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 Swan Lake Av over Marsh Stream built?

It was built in 1948, making it 77 years old in 2025.

What condition is Swan Lake Av over Marsh 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 December 2023.

How much traffic does Swan Lake Av over Marsh Stream carry?

About 1,209 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Swan Lake Av over Marsh Stream?

The structure is 64 ft (19.4 m) long with a longest span of 60 ft (18.3 m) and a deck 26 ft wide.

Who owns Swan Lake Av over Marsh Stream?

It is owned by the State Highway Agency.