US Bridges

Nh 10 over Oliverian Brook

Fair

Grafton County, New Hampshire · 1.0 MI East Vermont Sl · Structure no. 011700670014400

Built
1937
88 years old, rebuilt 1972
Condition
Fair
inspected July 2023
Type
Arch - Deck
Concrete
Length
68 ft
1 main span
Daily traffic
2,334
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 10 over Oliverian Brook is a concrete arch - deck carrying Nh 10 over Oliverian Brook in Grafton County, New Hampshire. It was built in 1937 and reconstructed in 1972, so it is 88 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 2,334 vehicles a day, roughly 7% of them trucks, projected to reach 3,454 by 2043. The structure is 68 ft (20.7 m) long and 38 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesNh 10
CrossesOliverian Brook
Location1.0 MI East Vermont Sl
RouteState Highway 10
CountyGrafton County
StateNew Hampshire
Coordinates44.04333, -72.05759
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
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
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating25.6 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length68 ft (20.7 m)
Longest span68 ft (20.7 m)
Deck width38 ft (11.6 m)
Roadway width35 ft (10.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,334 (2023)
Projected traffic3,454 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Oliverian Brook built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1972.

What condition is Nh 10 over Oliverian 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 Oliverian Brook carry?

About 2,334 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 10 over Oliverian Brook?

The structure is 68 ft (20.7 m) long with a longest span of 68 ft (20.7 m) and a deck 38 ft wide.

Who owns Nh 10 over Oliverian Brook?

It is owned by the State Highway Agency.