US Bridges

Nh 10 over Abbott Brook

Good

Cheshire County, New Hampshire · 1.9 Mi. from Gilsum Tl · Structure no. 016401170006700

Built
1964
61 years old
Condition
Good
inspected May 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
1,869
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 10 over Abbott Brook is a concrete culvert carrying Nh 10 over Abbott Brook in Cheshire County, New Hampshire. It was built in 1964, so it is 61 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 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 1,869 vehicles a day, roughly 4% of them trucks, projected to reach 2,766 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 21.1 mi (34 km).

CarriesNh 10
CrossesAbbott Brook
Location1.9 Mi. from Gilsum Tl
RouteState Highway 10
Coordinates43.09798, -72.19692
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating93.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,869 (2023)
Projected traffic2,766 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed21.1 mi (34 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Nh 10 over Abbott Brook built?

It was built in 1964, making it 61 years old in 2025.

What condition is Nh 10 over Abbott 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 May 2024.

How much traffic does Nh 10 over Abbott Brook carry?

About 1,869 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nh 10 over Abbott Brook?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m).

Who owns Nh 10 over Abbott Brook?

It is owned by the State Highway Agency.