US Bridges

Main ST over Cascade Stream

Fair

Franklin County, Maine · 0.1 MI S JCT S Shore Driv · Structure no. 2735

Built
1955
70 years old, rebuilt 1987
Condition
Fair
inspected December 2024
Type
Slab
Concrete
Length
29 ft
1 main span
Daily traffic
1,580
2016 count
Owner
State
State Highway Agency

About this bridge

Main ST over Cascade Stream is a concrete slab carrying Main ST over Cascade Stream in Franklin County, Maine. It was built in 1955 and reconstructed in 1987, so it is 70 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 1,580 vehicles a day, roughly 5% of them trucks, projected to reach 2,370 by 2036. The structure is 29 ft (8.7 m) long and 41 ft wide. If it were closed, the detour would be 87 mi (140 km).

Location

Open in Google Maps
CarriesMain ST
CrossesCascade Stream
Location0.1 MI S JCT S Shore Driv
RouteState Highway 4
CountyFranklin County
StateMaine
Coordinates44.92308, -70.61162
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
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 protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; action required to protect exposed foundations
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55 US tons
Inventory rating42.5 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length29 ft (8.7 m)
Longest span25 ft (7.6 m)
Deck width41 ft (12.4 m)
Roadway width37 ft (11.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,580 (2016)
Projected traffic2,370 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed87 mi (140 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 Main ST over Cascade Stream built?

It was built in 1955, making it 70 years old in 2025. It was reconstructed in 1987.

What condition is Main ST over Cascade 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 2024.

How much traffic does Main ST over Cascade Stream carry?

About 1,580 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Main ST over Cascade Stream?

The structure is 29 ft (8.7 m) long with a longest span of 25 ft (7.6 m) and a deck 41 ft wide.

Who owns Main ST over Cascade Stream?

It is owned by the State Highway Agency.