US Bridges

Roadway over Deception Brook

Fair

Coos County, New Hampshire · Map 11 · Structure no. 092201000001001

Built
1949
76 years old, rebuilt 2000
Condition
Fair
inspected October 2023
Type
Slab
Concrete Continuous
Length
26 ft
1 main span
Daily traffic
100
1984 count
Owner
Federal
U.S. Forest Service

About this bridge

Roadway over Deception Brook is a concrete continuous slab carrying Roadway over Deception Brook in Coos County, New Hampshire. It was built in 1949 and reconstructed in 2000, so it is 76 years old, older than the New Hampshire average of 56.9 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 100 vehicles a day, roughly 10% of them trucks, projected to reach 150 by 2045. The structure is 26 ft (7.9 m) long and 24 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

CarriesRoadway
CrossesDeception Brook
LocationMap 11
RouteFederal Lands Road 14
Coordinates44.28039, -71.46902
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.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28.9 US tons
Inventory rating22.2 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width24 ft (7.2 m)
Roadway width21 ft (6.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (1984)
Projected traffic150 by 2045
Trucks10%
Lanes on structure2
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.2 mi (158 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerU.S. Forest Service
Maintained byU.S. Forest Service
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Roadway over Deception Brook built?

It was built in 1949, making it 76 years old in 2025. It was reconstructed in 2000.

What condition is Roadway over Deception 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 October 2023.

How much traffic does Roadway over Deception Brook carry?

About 100 vehicles per day (1984 count), of which roughly 10% are trucks.

How long is Roadway over Deception Brook?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 24 ft wide.

Who owns Roadway over Deception Brook?

It is owned by the U.S. Forest Service.