US Bridges

Hill RD over Twelve Mile Stream

Fair

Kennebec County, Maine · 0.2 MI NW JCT Mutton Lane · Structure no. 5459

Built
1952
73 years old
Condition
Fair
inspected October 2024
Type
Slab
Concrete
Length
32 ft
1 main span
Daily traffic
1,745
2016 count
Owner
State
State Highway Agency

About this bridge

Hill RD over Twelve Mile Stream is a concrete slab carrying Hill RD over Twelve Mile Stream in Kennebec County, Maine. It was built in 1952, so it is 73 years old, older than the Maine average of 53.7 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,745 vehicles a day, roughly 5% of them trucks, projected to reach 2,618 by 2036. The structure is 32 ft (9.8 m) long and 28 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

CarriesHill RD
CrossesTwelve Mile Stream
Location0.2 MI NW JCT Mutton Lane
RouteCity Street 0
StateMaine
Coordinates44.64347, -69.50822
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to 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 rating60.7 US tons
Inventory rating46.7 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length32 ft (9.8 m)
Longest span29 ft (8.8 m)
Deck width28 ft (8.4 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,745 (2016)
Projected traffic2,618 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Hill RD over Twelve Mile Stream built?

It was built in 1952, making it 73 years old in 2025.

What condition is Hill RD over Twelve Mile Stream in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in October 2024.

How much traffic does Hill RD over Twelve Mile Stream carry?

About 1,745 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Hill RD over Twelve Mile Stream?

The structure is 32 ft (9.8 m) long with a longest span of 29 ft (8.8 m) and a deck 28 ft wide.

Who owns Hill RD over Twelve Mile Stream?

It is owned by the State Highway Agency.