US Bridges

Fdr 34 over Carrigan Brook

FairPosted for load

Carroll County, New Hampshire · Map 32 · Structure no. 092205000001068

Built
1979
46 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
93 ft
3 main spans
Daily traffic
50
Owner
Federal
U.S. Forest Service

About this bridge

Fdr 34 over Carrigan Brook is a wood or timber stringer/multi-beam or girder carrying Fdr 34 over Carrigan Brook in Carroll County, New Hampshire. It was built in 1979, so it is 46 years old, younger 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 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. Its operating status is: posted for load restriction.

It carries about 50 vehicles a day, projected to reach 75 by 2045. The structure is 93 ft (28.3 m) long and 16 ft wide. If it were closed, the detour would be 98.2 mi (158 km).

Location

Open in Google Maps
CarriesFdr 34
CrossesCarrigan Brook
LocationMap 32
RouteFederal Lands Road 34
CountyCarroll County
StateNew Hampshire
Coordinates44.05748, -71.40422
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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusPosted for load 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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment2: Basically intolerable, requiring high priority of replacement
Operating rating24.3 US tons
Inventory rating18.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span31 ft (9.6 m)
Deck width16 ft (4.8 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (—)
Projected traffic75 by 2045
Trucks—
Lanes on structure1
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 Fdr 34 over Carrigan Brook built?

It was built in 1979, making it 46 years old in 2025.

What condition is Fdr 34 over Carrigan 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 September 2023.

How much traffic does Fdr 34 over Carrigan Brook carry?

About 50 vehicles per day (latest count).

How long is Fdr 34 over Carrigan Brook?

The structure is 93 ft (28.3 m) long with a longest span of 31 ft (9.6 m) and a deck 16 ft wide.

Who owns Fdr 34 over Carrigan Brook?

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