US Bridges

Fowlers Mill Road over Swift River

Fair

Carroll County, New Hampshire · 0.13 Mi. RTE.113A · Structure no. 025200580009300

Built
1920
105 years old, rebuilt 1991
Condition
Fair
inspected October 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
42 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Fowlers Mill Road over Swift River is a steel stringer/multi-beam or girder carrying Fowlers Mill Road over Swift River in Carroll County, New Hampshire. It was built in 1920 and reconstructed in 1991, so it is 105 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 42 ft (12.8 m) long and 17 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesFowlers Mill Road
CrossesSwift River
Location0.13 Mi. RTE.113A
CountyCarroll County
StateNew Hampshire
Coordinates43.89452, -71.29707
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating29 US tons
Inventory rating22 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length42 ft (12.8 m)
Longest span31 ft (9.4 m)
Deck width17 ft (5.1 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$314,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Fowlers Mill Road over Swift River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1991.

What condition is Fowlers Mill Road over Swift River 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 Fowlers Mill Road over Swift River carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Fowlers Mill Road over Swift River?

The structure is 42 ft (12.8 m) long with a longest span of 31 ft (9.4 m) and a deck 17 ft wide.

Who owns Fowlers Mill Road over Swift River?

It is owned by the City or Municipal Highway Agency.