US Bridges

N Stonington RD over Mill Pond Outlet

Good

Hancock County, Maine · Deerisle-Stonington T.L. · Structure no. 3063

Built
2023
2 years old
Condition
Good
inspected January 2024
Type
Tee Beam
Prestressed Concrete
Length
46 ft
1 main span
Daily traffic
2,644
2016 count
Owner
State
State Highway Agency

About this bridge

N Stonington RD over Mill Pond Outlet is a prestressed concrete tee beam carrying N Stonington RD over Mill Pond Outlet in Hancock County, Maine. It was built in 2023, so it is 2 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 2,644 vehicles a day, roughly 5% of them trucks, projected to reach 3,702 by 2036. The structure is 46 ft (13.9 m) long and 31 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

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CarriesN Stonington RD
CrossesMill Pond Outlet
LocationDeerisle-Stonington T.L.
RouteState Highway 15
CountyHancock County
StateMaine
Coordinates44.18852, -68.66021
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating83.2 US tons
Inventory rating67.1 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadGreater than HL 93
Structure length46 ft (13.9 m)
Longest span40 ft (12.2 m)
Deck width31 ft (9.5 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,644 (2016)
Projected traffic3,702 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 N Stonington RD over Mill Pond Outlet built?

It was built in 2023, making it 2 years old in 2025.

What condition is N Stonington RD over Mill Pond Outlet 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 January 2024.

How much traffic does N Stonington RD over Mill Pond Outlet carry?

About 2,644 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is N Stonington RD over Mill Pond Outlet?

The structure is 46 ft (13.9 m) long with a longest span of 40 ft (12.2 m) and a deck 31 ft wide.

Who owns N Stonington RD over Mill Pond Outlet?

It is owned by the State Highway Agency.