US Bridges

Nh 9 over Otter Brook

Good

Cheshire County, New Hampshire · 0.5 MI SW to Roxbury Tl · Structure no. 024600930006000

Built
2020
5 years old
Condition
Good
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
163 ft
1 main span
Daily traffic
7,539
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 9 over Otter Brook is a steel stringer/multi-beam or girder carrying Nh 9 over Otter Brook in Cheshire 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 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 7,539 vehicles a day, roughly 7% of them trucks, projected to reach 11,157 by 2043. The structure is 163 ft (49.8 m) long and 44 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

Open in Google Maps
CarriesNh 9
CrossesOtter Brook
Location0.5 MI SW to Roxbury Tl
RouteState Highway 9
CountyCheshire County
StateNew Hampshire
Coordinates42.99209, -72.19577
Functional classRural Principal Arterial - Other

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 inspectionMay 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 adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating79.8 US tons
Inventory rating61.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length163 ft (49.8 m)
Longest span149 ft (45.4 m)
Deck width44 ft (13.3 m)
Roadway width39 ft (11.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,539 (2023)
Projected traffic11,157 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemYes

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 9 over Otter Brook built?

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

What condition is Nh 9 over Otter 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 May 2024.

How much traffic does Nh 9 over Otter Brook carry?

About 7,539 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 9 over Otter Brook?

The structure is 163 ft (49.8 m) long with a longest span of 149 ft (45.4 m) and a deck 44 ft wide.

Who owns Nh 9 over Otter Brook?

It is owned by the State Highway Agency.