US Bridges

Grimes Hill Road over Indian Pond Brook

Good

Grafton County, New Hampshire · 1.05 Mi. Rte. 10 · Structure no. 020301200017300

Built
2016
9 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
60 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Grimes Hill Road over Indian Pond Brook is a steel stringer/multi-beam or girder carrying Grimes Hill Road over Indian Pond Brook in Grafton County, New Hampshire. It was built in 2016, so it is 9 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 60 ft (18.4 m) long and 16 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesGrimes Hill Road
CrossesIndian Pond Brook
Location1.05 Mi. Rte. 10
CountyGrafton County
StateNew Hampshire
Coordinates43.94419, -72.08637
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo 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 evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating88 US tons
Inventory rating52.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadHL 93
Structure length60 ft (18.4 m)
Longest span58 ft (17.8 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 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 closed1.9 mi (3 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 Grimes Hill Road over Indian Pond Brook built?

It was built in 2016, making it 9 years old in 2025.

What condition is Grimes Hill Road over Indian Pond 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 2024.

How much traffic does Grimes Hill Road over Indian Pond Brook carry?

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

How long is Grimes Hill Road over Indian Pond Brook?

The structure is 60 ft (18.4 m) long with a longest span of 58 ft (17.8 m) and a deck 16 ft wide.

Who owns Grimes Hill Road over Indian Pond Brook?

It is owned by the City or Municipal Highway Agency.