US Bridges

Bridge ST over Narraguagus R

Good

Washington County, Maine · JCT 1 & 1A · Structure no. 3280

Built
2008
17 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
132 ft
2 main spans
Daily traffic
4,658
2016 count
Owner
State
State Highway Agency

About this bridge

Bridge ST over Narraguagus R is a prestressed concrete box beam or girders - multiple carrying Bridge ST over Narraguagus R in Washington County, Maine. It was built in 2008, so it is 17 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 4,658 vehicles a day, roughly 5% of them trucks, projected to reach 6,521 by 2036. The structure is 132 ft (40.1 m) long and 36 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesBridge ST
CrossesNarraguagus R
LocationJCT 1 & 1A
RouteState Highway 1
CountyWashington County
StateMaine
Coordinates44.5428, -67.88206
Functional classRural 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 inspectionSeptember 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 alignment8: Equal to present desirable criteria
Operating rating49.6 US tons
Inventory rating38.3 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans2
Design loadGreater than HL 93
Structure length132 ft (40.1 m)
Longest span65 ft (19.8 m)
Deck width36 ft (11 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,658 (2016)
Projected traffic6,521 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 Bridge ST over Narraguagus R built?

It was built in 2008, making it 17 years old in 2025.

What condition is Bridge ST over Narraguagus R 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 September 2023.

How much traffic does Bridge ST over Narraguagus R carry?

About 4,658 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Bridge ST over Narraguagus R?

The structure is 132 ft (40.1 m) long with a longest span of 65 ft (19.8 m) and a deck 36 ft wide.

Who owns Bridge ST over Narraguagus R?

It is owned by the State Highway Agency.