US Bridges

Nh 25 over Oliverian Brook

Good

Grafton County, New Hampshire · 3.6 MI from Benton Tl · Structure no. 011700560010200

Built
1999
26 years old
Condition
Good
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
83 ft
1 main span
Daily traffic
776
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 25 over Oliverian Brook is a steel stringer/multi-beam or girder carrying Nh 25 over Oliverian Brook in Grafton County, New Hampshire. It was built in 1999, so it is 26 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 776 vehicles a day, roughly 16% of them trucks, projected to reach 1,148 by 2043. The structure is 83 ft (25.4 m) long and 34 ft wide. If it were closed, the detour would be 16.2 mi (26 km).

CarriesNh 25
CrossesOliverian Brook
Location3.6 MI from Benton Tl
RouteState Highway 25
Coordinates44.02813, -72.02056
Functional classRural Minor Arterial

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.4 US tons
Inventory rating48.8 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length83 ft (25.4 m)
Longest span79 ft (24 m)
Deck width34 ft (10.5 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic776 (2023)
Projected traffic1,148 by 2043
Trucks16%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed16.2 mi (26 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Nh 25 over Oliverian Brook built?

It was built in 1999, making it 26 years old in 2025.

What condition is Nh 25 over Oliverian 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 June 2023.

How much traffic does Nh 25 over Oliverian Brook carry?

About 776 vehicles per day (2023 count), of which roughly 16% are trucks.

How long is Nh 25 over Oliverian Brook?

The structure is 83 ft (25.4 m) long with a longest span of 79 ft (24 m) and a deck 34 ft wide.

Who owns Nh 25 over Oliverian Brook?

It is owned by the State Highway Agency.