US Bridges

US Route 1 over Grand Falls Flowage

Good

Washington County, Maine · 0.4 MI NW JCT West ST · Structure no. 2688

Built
2011
14 years old
Condition
Good
inspected August 2024
Type
Tee Beam
Prestressed Concrete
Length
139 ft
2 main spans
Daily traffic
3,145
2016 count
Owner
State
State Highway Agency

About this bridge

US Route 1 over Grand Falls Flowage is a prestressed concrete tee beam carrying US Route 1 over Grand Falls Flowage in Washington 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 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 3,145 vehicles a day, roughly 5% of them trucks, projected to reach 4,403 by 2036. The structure is 139 ft (42.5 m) long and 44 ft wide. If it were closed, the detour would be 100 mi (161 km).

CarriesUS Route 1
CrossesGrand Falls Flowage
Location0.4 MI NW JCT West ST
RouteState Highway 1
StateMaine
Coordinates45.22586, -67.57697
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2024
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 rating53.6 US tons
Inventory rating37.5 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans2
Design loadGreater than HL 93
Structure length139 ft (42.5 m)
Longest span68 ft (20.7 m)
Deck width44 ft (13.4 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,145 (2016)
Projected traffic4,403 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed100 mi (161 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 US Route 1 over Grand Falls Flowage built?

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

What condition is US Route 1 over Grand Falls Flowage 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 2024.

How much traffic does US Route 1 over Grand Falls Flowage carry?

About 3,145 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is US Route 1 over Grand Falls Flowage?

The structure is 139 ft (42.5 m) long with a longest span of 68 ft (20.7 m) and a deck 44 ft wide.

Who owns US Route 1 over Grand Falls Flowage?

It is owned by the State Highway Agency.