US Bridges

Willow Street over Beaver Brook

Good

Hillsborough County, New Hampshire · 0.27 Mi. Rte. 30 · Structure no. 020501050006900

Built
2019
6 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
106 ft
1 main span
Daily traffic
5,306
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Willow Street over Beaver Brook is a steel stringer/multi-beam or girder carrying Willow Street over Beaver Brook in Hillsborough County, New Hampshire. It was built in 2019, so it is 6 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 5,306 vehicles a day, roughly 4% of them trucks, projected to reach 7,852 by 2043. The structure is 106 ft (32.3 m) long and 37 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesWillow Street
CrossesBeaver Brook
Location0.27 Mi. Rte. 30
Coordinates42.71894, -71.32369
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
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo 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 evaluation9: Superior to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating85 US tons
Inventory rating65.6 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length106 ft (32.3 m)
Longest span100 ft (30.5 m)
Deck width37 ft (11.4 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,306 (2023)
Projected traffic7,852 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-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 Willow Street over Beaver Brook built?

It was built in 2019, making it 6 years old in 2025.

What condition is Willow Street over Beaver 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 Willow Street over Beaver Brook carry?

About 5,306 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Willow Street over Beaver Brook?

The structure is 106 ft (32.3 m) long with a longest span of 100 ft (30.5 m) and a deck 37 ft wide.

Who owns Willow Street over Beaver Brook?

It is owned by the City or Municipal Highway Agency.