US Bridges

Nh 9 over Ash Swamp Brook

Good

Cheshire County, New Hampshire · 3.2 MI E Westmoreland Tl · Structure no. 013601050006700

Built
2006
19 years old
Condition
Good
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
108 ft
1 main span
Daily traffic
22,417
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 9 over Ash Swamp Brook is a steel stringer/multi-beam or girder carrying Nh 9 over Ash Swamp Brook in Cheshire County, New Hampshire. It was built in 2006, so it is 19 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 22,417 vehicles a day, roughly 8% of them trucks, projected to reach 33,177 by 2043. The structure is 108 ft (32.9 m) long and 108 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNh 9
CrossesAsh Swamp Brook
Location3.2 MI E Westmoreland Tl
RouteState Highway 9
Coordinates42.92366, -72.30773
Functional classUrban Other Principal Arterial

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.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating91.8 US tons
Inventory rating55.1 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length108 ft (32.9 m)
Longest span102 ft (31.1 m)
Deck width108 ft (32.9 m)
Roadway width103 ft (31.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic22,417 (2023)
Projected traffic33,177 by 2043
Trucks8%
Lanes on structure6
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemYes

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 Nh 9 over Ash Swamp Brook built?

It was built in 2006, making it 19 years old in 2025.

What condition is Nh 9 over Ash Swamp Brook 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 March 2023.

How much traffic does Nh 9 over Ash Swamp Brook carry?

About 22,417 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Nh 9 over Ash Swamp Brook?

The structure is 108 ft (32.9 m) long with a longest span of 102 ft (31.1 m) and a deck 108 ft wide.

Who owns Nh 9 over Ash Swamp Brook?

It is owned by the State Highway Agency.