US Bridges

Marlow Road over Ashuelot River

Fair

Sullivan County, New Hampshire · Town RD 0.54 MI Marlow Tl · Structure no. 026500500004300

Built
1920
105 years old, rebuilt 2001
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
46 ft
2 main spans
Daily traffic
65
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Marlow Road over Ashuelot River is a steel stringer/multi-beam or girder carrying Marlow Road over Ashuelot River in Sullivan County, New Hampshire. It was built in 1920 and reconstructed in 2001, so it is 105 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 65 vehicles a day, roughly 4% of them trucks, projected to reach 96 by 2043. The structure is 46 ft (13.9 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesMarlow Road
CrossesAshuelot River
LocationTown RD 0.54 MI Marlow Tl
CountySullivan County
StateNew Hampshire
Coordinates43.14791, -72.1645
Functional classRural Local

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating68.5 US tons
Inventory rating52.2 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans2
Design loadHS 25 or greater
Structure length46 ft (13.9 m)
Longest span28 ft (8.5 m)
Deck width16 ft (4.9 m)
Roadway width16 ft (4.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic65 (2023)
Projected traffic96 by 2043
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Marlow Road over Ashuelot River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 2001.

What condition is Marlow 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 2024.

How much traffic does Marlow Road over Ashuelot River carry?

About 65 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Marlow Road over Ashuelot River?

The structure is 46 ft (13.9 m) long with a longest span of 28 ft (8.5 m) and a deck 16 ft wide.

Who owns Marlow Road over Ashuelot River?

It is owned by the City or Municipal Highway Agency.