US Bridges

French Pond Road over Clark Brook

Fair

Grafton County, New Hampshire · 0.18 MI FR Blackmount RD · Structure no. 011701410009000

Built
1983
42 years old
Condition
Fair
inspected June 2024
Type
Culvert
Steel
Length
25 ft
2 main spans
Daily traffic
723
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

French Pond Road over Clark Brook is a steel culvert carrying French Pond Road over Clark Brook in Grafton County, New Hampshire. It was built in 1983, so it is 42 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 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 723 vehicles a day, roughly 4% of them trucks, projected to reach 1,070 by 2043. The structure is 25 ft (7.6 m) long. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesFrench Pond Road
CrossesClark Brook
Location0.18 MI FR Blackmount RD
CountyGrafton County
StateNew Hampshire
Coordinates44.07932, -71.98328
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 inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating43.7 US tons
Inventory rating31.3 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length25 ft (7.6 m)
Longest span10 ft (3 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic723 (2023)
Projected traffic1,070 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Pond Road over Clark Brook built?

It was built in 1983, making it 42 years old in 2025.

What condition is French Pond Road over Clark 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 June 2024.

How much traffic does French Pond Road over Clark Brook carry?

About 723 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is French Pond Road over Clark Brook?

The structure is 25 ft (7.6 m) long with a longest span of 10 ft (3 m).

Who owns French Pond Road over Clark Brook?

It is owned by the City or Municipal Highway Agency.