US Bridges

West Deering Road over Contoocook River

Good

Hillsborough County, New Hampshire · Antrim Tl · Structure no. 006100320010100

Built
2010
15 years old
Condition
Good
inspected August 2024
Type
Other
Steel
Length
118 ft
1 main span
Daily traffic
808
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

West Deering Road over Contoocook River is a steel other carrying West Deering Road over Contoocook River in Hillsborough County, New Hampshire. It was built in 2010, so it is 15 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 808 vehicles a day, roughly 4% of them trucks, projected to reach 1,195 by 2043. The structure is 118 ft (36 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

CarriesWest Deering Road
CrossesContoocook River
LocationAntrim Tl
Coordinates43.07984, -71.91489
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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating86.8 US tons
Inventory rating52 US tons

Structure

Structure typeOther
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length118 ft (36 m)
Longest span110 ft (33.5 m)
Deck width29 ft (8.8 m)
Roadway width25 ft (7.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic808 (2023)
Projected traffic1,195 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 West Deering Road over Contoocook River built?

It was built in 2010, making it 15 years old in 2025.

What condition is West Deering Road over Contoocook River 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 August 2024.

How much traffic does West Deering Road over Contoocook River carry?

About 808 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is West Deering Road over Contoocook River?

The structure is 118 ft (36 m) long with a longest span of 110 ft (33.5 m) and a deck 29 ft wide.

Who owns West Deering Road over Contoocook River?

It is owned by the City or Municipal Highway Agency.