US Bridges

Reservoir Road over Clay Brook

Good

Grafton County, New Hampshire · .5 M F New Hebron RD · Structure no. 021600990012700

Built
2007
18 years old
Condition
Good
inspected July 2024
Type
Frame
Concrete
Length
26 ft
1 main span
Daily traffic
442
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Reservoir Road over Clay Brook is a concrete frame carrying Reservoir Road over Clay Brook in Grafton County, New Hampshire. It was built in 2007, so it is 18 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 442 vehicles a day, projected to reach 654 by 2043. The structure is 26 ft (7.9 m) long and 27 ft wide.

CarriesReservoir Road
CrossesClay Brook
Location.5 M F New Hebron RD
Coordinates43.75833, -71.72759
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.4 US tons
Inventory rating47.1 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length26 ft (7.9 m)
Longest span24 ft (7.3 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic442 (2023)
Projected traffic654 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
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 Reservoir Road over Clay Brook built?

It was built in 2007, making it 18 years old in 2025.

What condition is Reservoir Road over Clay Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in July 2024.

How much traffic does Reservoir Road over Clay Brook carry?

About 442 vehicles per day (2023 count).

How long is Reservoir Road over Clay Brook?

The structure is 26 ft (7.9 m) long with a longest span of 24 ft (7.3 m) and a deck 27 ft wide.

Who owns Reservoir Road over Clay Brook?

It is owned by the City or Municipal Highway Agency.