US Bridges

Mountain Road over Ashuelot River

Fair

Sullivan County, New Hampshire · 0.45 Mi. Tl Washington · Structure no. 014601480006700

Built
1936
89 years old, rebuilt 2012
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
30 ft
1 main span
Daily traffic
1,167
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mountain Road over Ashuelot River is a steel stringer/multi-beam or girder carrying Mountain Road over Ashuelot River in Sullivan County, New Hampshire. It was built in 1936 and reconstructed in 2012, so it is 89 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 1,167 vehicles a day, roughly 10% of them trucks, projected to reach 1,727 by 2043. The structure is 30 ft (9.1 m) long and 23 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

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CarriesMountain Road
CrossesAshuelot River
Location0.45 Mi. Tl Washington
CountySullivan County
StateNew Hampshire
Coordinates43.19891, -72.13428
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
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 evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating38 US tons
Inventory rating28.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span22 ft (6.7 m)
Deck width23 ft (7 m)
Roadway width19 ft (5.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,167 (2023)
Projected traffic1,727 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Mountain Road over Ashuelot River built?

It was built in 1936, making it 89 years old in 2025. It was reconstructed in 2012.

What condition is Mountain Road over Ashuelot River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in September 2023.

How much traffic does Mountain Road over Ashuelot River carry?

About 1,167 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Mountain Road over Ashuelot River?

The structure is 30 ft (9.1 m) long with a longest span of 22 ft (6.7 m) and a deck 23 ft wide.

Who owns Mountain Road over Ashuelot River?

It is owned by the City or Municipal Highway Agency.