US Bridges

US 3 over Upper Ammonoosuc River

Good

Coos County, New Hampshire · 4.4 MI from Lancaster Tl · Structure no. 019801060011200

Built
1995
30 years old
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
235 ft
2 main spans
Daily traffic
5,412
2023 count
Owner
State
State Highway Agency

About this bridge

US 3 over Upper Ammonoosuc River is a steel continuous stringer/multi-beam or girder carrying US 3 over Upper Ammonoosuc River in Coos County, New Hampshire. It was built in 1995, so it is 30 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 5,412 vehicles a day, roughly 7% of them trucks, projected to reach 8,009 by 2043. The structure is 235 ft (71.6 m) long and 57 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

CarriesUS 3
CrossesUpper Ammonoosuc River
Location4.4 MI from Lancaster Tl
RouteU.S. Route 3
Coordinates44.59481, -71.51129
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
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 rating65.5 US tons
Inventory rating45 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 25 or greater
Structure length235 ft (71.6 m)
Longest span115 ft (35.1 m)
Deck width57 ft (17.5 m)
Roadway width50 ft (15.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,412 (2023)
Projected traffic8,009 by 2043
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

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 US 3 over Upper Ammonoosuc River built?

It was built in 1995, making it 30 years old in 2025.

What condition is US 3 over Upper 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 August 2024.

How much traffic does US 3 over Upper Ammonoosuc River carry?

About 5,412 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US 3 over Upper Ammonoosuc River?

The structure is 235 ft (71.6 m) long with a longest span of 115 ft (35.1 m) and a deck 57 ft wide.

Who owns US 3 over Upper Ammonoosuc River?

It is owned by the State Highway Agency.