US Bridges

Mahoney Hill RD over Johnson Brook

Fair

Somerset County, Maine · 2.3 MI E of JCT RTE 201 · Structure no. 5254

Built
1950
75 years old
Condition
Fair
inspected November 2023
Type
Culvert
Steel
Length
22 ft
1 main span
Daily traffic
97
2016 count
Owner
Town / Township
Town or Township Highway Agency

About this bridge

Mahoney Hill RD over Johnson Brook is a steel culvert carrying Mahoney Hill RD over Johnson Brook in Somerset County, Maine. It was built in 1950, so it is 75 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 97 vehicles a day, roughly 5% of them trucks, projected to reach 155 by 2036. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 100 mi (161 km).

Location

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CarriesMahoney Hill RD
CrossesJohnson Brook
Location2.3 MI E of JCT RTE 201
RouteCity Street 0
CountySomerset County
StateMaine
Coordinates45.03919, -69.81517
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
Channel and channel protection7 GoodSome minor problems.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionNovember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating62.2 US tons
Inventory rating47.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans1
Design loadH 15
Structure length22 ft (6.7 m)
Longest span22 ft (6.7 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic97 (2016)
Projected traffic155 by 2036
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed100 mi (161 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerTown or Township Highway Agency
Maintained byTown or Township 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 Mahoney Hill RD over Johnson Brook built?

It was built in 1950, making it 75 years old in 2025.

What condition is Mahoney Hill RD over Johnson Brook 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 November 2023.

How much traffic does Mahoney Hill RD over Johnson Brook carry?

About 97 vehicles per day (2016 count), of which roughly 5% are trucks.

How long is Mahoney Hill RD over Johnson Brook?

The structure is 22 ft (6.7 m) long with a longest span of 22 ft (6.7 m).

Who owns Mahoney Hill RD over Johnson Brook?

It is owned by the Town or Township Highway Agency.