US Bridges

French Road over Johns River

Fair

Coos County, New Hampshire · 2.9 MI Nh 135 · Structure no. 005701780012900

Built
1948
77 years old, rebuilt 2002
Condition
Fair
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
55 ft
1 main span
Daily traffic
210
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

French Road over Johns River is a steel stringer/multi-beam or girder carrying French Road over Johns River in Coos County, New Hampshire. It was built in 1948 and reconstructed in 2002, so it is 77 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 210 vehicles a day, roughly 4% of them trucks, projected to reach 310 by 2043. The structure is 55 ft (16.8 m) long and 27 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

CarriesFrench Road
CrossesJohns River
Location2.9 MI Nh 135
Coordinates44.40719, -71.63182
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.9 US tons
Inventory rating40.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length55 ft (16.8 m)
Longest span51 ft (15.5 m)
Deck width27 ft (8.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic210 (2023)
Projected traffic310 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 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 French Road over Johns River built?

It was built in 1948, making it 77 years old in 2025. It was reconstructed in 2002.

What condition is French Road over Johns 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 August 2024.

How much traffic does French Road over Johns River carry?

About 210 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is French Road over Johns River?

The structure is 55 ft (16.8 m) long with a longest span of 51 ft (15.5 m) and a deck 27 ft wide.

Who owns French Road over Johns River?

It is owned by the City or Municipal Highway Agency.