US Bridges

Old Town Road over Ammonoosuc River

Good

Coos County, New Hampshire · 1.6 MI from Bethlehem Tl · Structure no. 003901430005100

Built
1915
110 years old, rebuilt 2008
Condition
Good
inspected August 2024
Type
Other
Steel
Length
84 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old Town Road over Ammonoosuc River is a steel other carrying Old Town Road over Ammonoosuc River in Coos County, New Hampshire. It was built in 1915 and reconstructed in 2008, so it is 110 years old, older 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 84 ft (25.6 m) long and 14 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesOld Town Road
CrossesAmmonoosuc River
Location1.6 MI from Bethlehem Tl
Coordinates44.27186, -71.54999
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66 US tons
Inventory rating48.9 US tons

Structure

Structure typeOther
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length84 ft (25.6 m)
Longest span80 ft (24.4 m)
Deck width14 ft (4.4 m)
Roadway width13 ft (3.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
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 Old Town Road over Ammonoosuc River built?

It was built in 1915, making it 110 years old in 2025. It was reconstructed in 2008.

What condition is Old Town Road 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 August 2024.

How much traffic does Old Town Road over Ammonoosuc River carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Old Town Road over Ammonoosuc River?

The structure is 84 ft (25.6 m) long with a longest span of 80 ft (24.4 m) and a deck 14 ft wide.

Who owns Old Town Road over Ammonoosuc River?

It is owned by the City or Municipal Highway Agency.