US Bridges

Nh 10 over Eastman Brook

Fair

Grafton County, New Hampshire · 1.4 MI from Orford T.L. · Structure no. 020900670009300

Built
1952
73 years old
Condition
Fair
inspected July 2023
Type
Culvert
Concrete
Length
30 ft
1 main span
Daily traffic
1,247
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 10 over Eastman Brook is a concrete culvert carrying Nh 10 over Eastman Brook in Grafton County, New Hampshire. It was built in 1952, so it is 73 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 1,247 vehicles a day, roughly 7% of them trucks, projected to reach 1,845 by 2043. The structure is 30 ft (9.1 m) long and 49 ft wide. If it were closed, the detour would be 18 mi (29 km).

Location

Open in Google Maps
CarriesNh 10
CrossesEastman Brook
Location1.4 MI from Orford T.L.
RouteState Highway 10
CountyGrafton County
StateNew Hampshire
Coordinates43.96976, -72.07965
Functional classRural Minor Arterial

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 inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating52 US tons
Inventory rating37.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 20
Structure length30 ft (9.1 m)
Longest span30 ft (9.1 m)
Deck width49 ft (15 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,247 (2023)
Projected traffic1,845 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed18 mi (29 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 Eastman Brook built?

It was built in 1952, making it 73 years old in 2025.

What condition is Nh 10 over Eastman 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 July 2023.

How much traffic does Nh 10 over Eastman Brook carry?

About 1,247 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 10 over Eastman Brook?

The structure is 30 ft (9.1 m) long with a longest span of 30 ft (9.1 m) and a deck 49 ft wide.

Who owns Nh 10 over Eastman Brook?

It is owned by the State Highway Agency.