US Bridges

River Road over Hewes Brook

Good

Grafton County, New Hampshire · 1.2 Mi. Tl Hanover · Structure no. 015700410007400

Built
2020
5 years old
Condition
Good
inspected September 2023
Type
Slab
Wood or Timber
Length
38 ft
1 main span
Daily traffic
288
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

River Road over Hewes Brook is a wood or timber slab carrying River Road over Hewes Brook in Grafton County, New Hampshire. It was built in 2020, so it is 5 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 288 vehicles a day, roughly 4% of them trucks, projected to reach 426 by 2043. The structure is 38 ft (11.6 m) long and 20 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesRiver Road
CrossesHewes Brook
Location1.2 Mi. Tl Hanover
CountyGrafton County
StateNew Hampshire
Coordinates43.78543, -72.19706
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating78.5 US tons
Inventory rating55.6 US tons

Structure

Structure typeSlab
MaterialWood or Timber
DeckWood or timber
Main spans1
Design loadHS 25 or greater
Structure length38 ft (11.6 m)
Longest span34 ft (10.4 m)
Deck width20 ft (6.2 m)
Roadway width18 ft (5.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic288 (2023)
Projected traffic426 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 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 River Road over Hewes Brook built?

It was built in 2020, making it 5 years old in 2025.

What condition is River Road over Hewes 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 September 2023.

How much traffic does River Road over Hewes Brook carry?

About 288 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is River Road over Hewes Brook?

The structure is 38 ft (11.6 m) long with a longest span of 34 ft (10.4 m) and a deck 20 ft wide.

Who owns River Road over Hewes Brook?

It is owned by the City or Municipal Highway Agency.