US Bridges

NH122 over Souhegan River Rec Path

Good

Hillsborough County, New Hampshire · 2.35 MI N Hollis Tl · Structure no. 000701860010700

Built
1956
69 years old, rebuilt 1996
Condition
Good
inspected August 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
142 ft
3 main spans
Daily traffic
6,846
2023 count
Owner
State
State Highway Agency

About this bridge

NH122 over Souhegan River Rec Path is a steel continuous stringer/multi-beam or girder carrying NH122 over Souhegan River Rec Path in Hillsborough County, New Hampshire. It was built in 1956 and reconstructed in 1996, so it is 69 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 6,846 vehicles a day, roughly 4% of them trucks, projected to reach 10,132 by 2043. The structure is 142 ft (43.3 m) long and 35 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNH122
CrossesSouhegan River Rec Path
Location2.35 MI N Hollis Tl
RouteState Highway 122
Coordinates42.82938, -71.60965
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
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 above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating80 US tons
Inventory rating48 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length142 ft (43.3 m)
Longest span48 ft (14.6 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic6,846 (2023)
Projected traffic10,132 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 NH122 over Souhegan River Rec Path built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1996.

What condition is NH122 over Souhegan River Rec Path 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 NH122 over Souhegan River Rec Path carry?

About 6,846 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH122 over Souhegan River Rec Path?

The structure is 142 ft (43.3 m) long with a longest span of 48 ft (14.6 m) and a deck 35 ft wide.

Who owns NH122 over Souhegan River Rec Path?

It is owned by the State Highway Agency.