US Bridges

Oak Hill Road over Grafton Pond Outlet

Good

Grafton County, New Hampshire · At Grafton RD Inter. · Structure no. 007701980010300

Built
2023
2 years old
Condition
Good
inspected September 2024
Type
Slab
Wood or Timber
Length
38 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Oak Hill Road over Grafton Pond Outlet is a wood or timber slab carrying Oak Hill Road over Grafton Pond Outlet in Grafton County, New Hampshire. It was built in 2023, so it is 2 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 38 ft (11.7 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesOak Hill Road
CrossesGrafton Pond Outlet
LocationAt Grafton RD Inter.
CountyGrafton County
StateNew Hampshire
Coordinates43.57462, -72.05817
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating40.7 US tons
Inventory rating40.7 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadUnknown
Structure length38 ft (11.7 m)
Longest span34 ft (10.5 m)
Deck width25 ft (7.5 m)
Roadway width23 ft (6.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
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 Oak Hill Road over Grafton Pond Outlet built?

It was built in 2023, making it 2 years old in 2025.

What condition is Oak Hill Road over Grafton Pond Outlet 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 September 2024.

How much traffic does Oak Hill Road over Grafton Pond Outlet carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Oak Hill Road over Grafton Pond Outlet?

The structure is 38 ft (11.7 m) long with a longest span of 34 ft (10.5 m) and a deck 25 ft wide.

Who owns Oak Hill Road over Grafton Pond Outlet?

It is owned by the City or Municipal Highway Agency.