US Bridges

Cobbs Bridge Road over Royal River

Fair

Cumberland County, Maine · 1.5 MI NE JCT Route 231 · Structure no. 3137

Built
1934
91 years old, rebuilt 2014
Condition
Fair
inspected July 2023
Type
Tee Beam
Concrete
Length
101 ft
3 main spans
Daily traffic
474
2016 count
Owner
State
State Highway Agency

About this bridge

Cobbs Bridge Road over Royal River is a concrete tee beam carrying Cobbs Bridge Road over Royal River in Cumberland County, Maine. It was built in 1934 and reconstructed in 2014, so it is 91 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 474 vehicles a day, roughly 5% of them trucks, projected to reach 758 by 2036. The structure is 101 ft (30.7 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesCobbs Bridge Road
CrossesRoyal River
Location1.5 MI NE JCT Route 231
RouteCity Street 0
CountyCumberland County
StateMaine
Coordinates43.98002, -70.2653
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJuly 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 adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38.6 US tons
Inventory rating30 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length101 ft (30.7 m)
Longest span45 ft (13.8 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic474 (2016)
Projected traffic758 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Cobbs Bridge Road over Royal River built?

It was built in 1934, making it 91 years old in 2025. It was reconstructed in 2014.

What condition is Cobbs Bridge Road over Royal 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 July 2023.

How much traffic does Cobbs Bridge Road over Royal River carry?

About 474 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Cobbs Bridge Road over Royal River?

The structure is 101 ft (30.7 m) long with a longest span of 45 ft (13.8 m) and a deck 24 ft wide.

Who owns Cobbs Bridge Road over Royal River?

It is owned by the State Highway Agency.