US Bridges

Loon Cove Road over Watson Brook

Good

Belknap County, New Hampshire · 200 Ft East Nh 11 · Structure no. 000601410022200

Built
2022
3 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
36 ft
1 main span
Daily traffic
510
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Loon Cove Road over Watson Brook is a prestressed concrete box beam or girders - multiple carrying Loon Cove Road over Watson Brook in Belknap County, New Hampshire. It was built in 2022, so it is 3 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 510 vehicles a day, projected to reach 754 by 2043. The structure is 36 ft (11 m) long and 26 ft wide.

Location

Open in Google Maps
CarriesLoon Cove Road
CrossesWatson Brook
Location200 Ft East Nh 11
CountyBelknap County
StateNew Hampshire
Coordinates43.49644, -71.25769
Functional classUrban 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 protection6 SatisfactoryStructural elements show some minor deterioration.
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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating70.7 US tons
Inventory rating54.6 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length36 ft (11 m)
Longest span31 ft (9.3 m)
Deck width26 ft (7.9 m)
Roadway width23 ft (7.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic510 (2023)
Projected traffic754 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Loon Cove Road over Watson Brook built?

It was built in 2022, making it 3 years old in 2025.

What condition is Loon Cove Road over Watson 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 Loon Cove Road over Watson Brook carry?

About 510 vehicles per day (2023 count).

How long is Loon Cove Road over Watson Brook?

The structure is 36 ft (11 m) long with a longest span of 31 ft (9.3 m) and a deck 26 ft wide.

Who owns Loon Cove Road over Watson Brook?

It is owned by the City or Municipal Highway Agency.