US Bridges

Back Brooks RD over So Br Marsh River

Fair

Waldo County, Maine · 0.1 MI SW of RTE 141 · Structure no. 2172

Built
1939
86 years old
Condition
Fair
inspected March 2024
Type
Tee Beam
Concrete
Length
52 ft
1 main span
Daily traffic
263
2016 count
Owner
State
State Highway Agency

About this bridge

Back Brooks RD over So Br Marsh River is a concrete tee beam carrying Back Brooks RD over So Br Marsh River in Waldo County, Maine. It was built in 1939, 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 263 vehicles a day, roughly 5% of them trucks, projected to reach 421 by 2036. The structure is 52 ft (15.9 m) long and 25 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

Location

Open in Google Maps
CarriesBack Brooks RD
CrossesSo Br Marsh River
Location0.1 MI SW of RTE 141
RouteCity Street 0
CountyWaldo County
StateMaine
Coordinates44.58501, -69.01127
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.
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 inspectionMarch 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
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 rating37.8 US tons
Inventory rating28.9 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length52 ft (15.9 m)
Longest span50 ft (15.2 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic263 (2016)
Projected traffic421 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 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 Back Brooks RD over So Br Marsh River built?

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

What condition is Back Brooks RD over So Br Marsh River 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 March 2024.

How much traffic does Back Brooks RD over So Br Marsh River carry?

About 263 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Back Brooks RD over So Br Marsh River?

The structure is 52 ft (15.9 m) long with a longest span of 50 ft (15.2 m) and a deck 25 ft wide.

Who owns Back Brooks RD over So Br Marsh River?

It is owned by the State Highway Agency.