US Bridges

Beacon Street over Ammonoosuc River

Good

Grafton County, New Hampshire · 0.03 MI from Nh RTE 116 · Structure no. 015302200005600

Built
2000
25 years old
Condition
Good
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
175 ft
1 main span
Daily traffic
869
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Beacon Street over Ammonoosuc River is a steel continuous stringer/multi-beam or girder carrying Beacon Street over Ammonoosuc River in Grafton County, New Hampshire. It was built in 2000, so it is 25 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 869 vehicles a day, roughly 4% of them trucks, projected to reach 1,286 by 2043. The structure is 175 ft (53.3 m) long and 44 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBeacon Street
CrossesAmmonoosuc River
Location0.03 MI from Nh RTE 116
RouteCity Street 0
CountyGrafton County
StateNew Hampshire
Coordinates44.30812, -71.76422
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.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length175 ft (53.3 m)
Longest span168 ft (51.1 m)
Deck width44 ft (13.4 m)
Roadway width35 ft (10.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic869 (2023)
Projected traffic1,286 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Beacon Street over Ammonoosuc River built?

It was built in 2000, making it 25 years old in 2025.

What condition is Beacon Street over Ammonoosuc 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 April 2023.

How much traffic does Beacon Street over Ammonoosuc River carry?

About 869 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Beacon Street over Ammonoosuc River?

The structure is 175 ft (53.3 m) long with a longest span of 168 ft (51.1 m) and a deck 44 ft wide.

Who owns Beacon Street over Ammonoosuc River?

It is owned by the City or Municipal Highway Agency.