US Bridges

Water ST over Cobbossee Stream

Good

Kennebec County, Maine · 0.7 MI E of W. Gardiner · Structure no. 2605

Built
2009
16 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
121 ft
1 main span
Daily traffic
8,478
2016 count
Owner
State
State Highway Agency

About this bridge

Water ST over Cobbossee Stream is a prestressed concrete stringer/multi-beam or girder carrying Water ST over Cobbossee Stream in Kennebec County, Maine. It was built in 2009, so it is 16 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 8,478 vehicles a day, roughly 5% of them trucks, projected to reach 11,869 by 2036. The structure is 121 ft (36.9 m) long and 40 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesWater ST
CrossesCobbossee Stream
Location0.7 MI E of W. Gardiner
RouteState Highway 9
CountyKennebec County
StateMaine
Coordinates44.21995, -69.78996
Functional classUrban Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating65 US tons
Inventory rating50.4 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length121 ft (36.9 m)
Longest span113 ft (34.4 m)
Deck width40 ft (12.1 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic8,478 (2016)
Projected traffic11,869 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed8.7 mi (14 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 Water ST over Cobbossee Stream built?

It was built in 2009, making it 16 years old in 2025.

What condition is Water ST over Cobbossee 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 August 2023.

How much traffic does Water ST over Cobbossee Stream carry?

About 8,478 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Water ST over Cobbossee Stream?

The structure is 121 ft (36.9 m) long with a longest span of 113 ft (34.4 m) and a deck 40 ft wide.

Who owns Water ST over Cobbossee Stream?

It is owned by the State Highway Agency.