US Bridges

Cobbossee RD over Jock Stream

Good

Kennebec County, Maine · 1.0MI Ely of Sanborn RD · Structure no. 2412

Built
2011
14 years old
Condition
Good
inspected March 2024
Type
Slab
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
1,118
2016 count
Owner
State
State Highway Agency

About this bridge

Cobbossee RD over Jock Stream is a prestressed concrete slab carrying Cobbossee RD over Jock Stream in Kennebec County, Maine. It was built in 2011, so it is 14 years old, younger than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,118 vehicles a day, roughly 5% of them trucks, projected to reach 1,677 by 2036. The structure is 60 ft (18.4 m) long and 32 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesCobbossee RD
CrossesJock Stream
Location1.0MI Ely of Sanborn RD
RouteCounty Highway 0
StateMaine
Coordinates44.21521, -69.96649
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating86.1 US tons
Inventory rating66.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadGreater than HL 93
Structure length60 ft (18.4 m)
Longest span58 ft (17.7 m)
Deck width32 ft (9.7 m)
Roadway width29 ft (8.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,118 (2016)
Projected traffic1,677 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed14.3 mi (23 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 Cobbossee RD over Jock Stream built?

It was built in 2011, making it 14 years old in 2025.

What condition is Cobbossee RD over Jock Stream in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in March 2024.

How much traffic does Cobbossee RD over Jock Stream carry?

About 1,118 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Cobbossee RD over Jock Stream?

The structure is 60 ft (18.4 m) long with a longest span of 58 ft (17.7 m) and a deck 32 ft wide.

Who owns Cobbossee RD over Jock Stream?

It is owned by the State Highway Agency.