US Bridges

Patterson RD over Kennebec River

Good

Lincoln County, Maine · .5 MI W 128 · Structure no. 2506

Built
2014
11 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
1,480 ft
7 main spans
Daily traffic
3,105
2016 count
Owner
State
State Highway Agency

About this bridge

Patterson RD over Kennebec River is a steel continuous stringer/multi-beam or girder carrying Patterson RD over Kennebec River in Lincoln County, Maine. It was built in 2014, so it is 11 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 3,105 vehicles a day, roughly 5% of them trucks, projected to reach 4,347 by 2036. The structure is 1,480 ft (451.2 m) long and 35 ft wide. If it were closed, the detour would be 19.9 mi (32 km).

CarriesPatterson RD
CrossesKennebec River
Location.5 MI W 128
RouteState Highway 197
StateMaine
Coordinates44.09074, -69.78211
Functional classRural Major 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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
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 rating53.6 US tons
Inventory rating41.1 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans7
Design loadGreater than HL 93
Structure length1,480 ft (451.2 m)
Longest span240 ft (73.2 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,105 (2016)
Projected traffic4,347 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed19.9 mi (32 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—
NavigationNavigation control on waterway (bridge permit required)

Frequently asked questions

When was Patterson RD over Kennebec River built?

It was built in 2014, making it 11 years old in 2025.

What condition is Patterson RD over Kennebec River 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 June 2024.

How much traffic does Patterson RD over Kennebec River carry?

About 3,105 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Patterson RD over Kennebec River?

The structure is 1,480 ft (451.2 m) long with a longest span of 240 ft (73.2 m) and a deck 35 ft wide.

Who owns Patterson RD over Kennebec River?

It is owned by the State Highway Agency.