US Bridges

West Hollis Road over Nissitissit River

Fair

Hillsborough County, New Hampshire · .1 MI N. Mass. Line · Structure no. 012700690002800

Built
1978
47 years old
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
58 ft
1 main span
Daily traffic
1,548
2023 count
Owner
State
State Highway Agency

About this bridge

West Hollis Road over Nissitissit River is a steel stringer/multi-beam or girder carrying West Hollis Road over Nissitissit River in Hillsborough County, New Hampshire. It was built in 1978, so it is 47 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 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 1,548 vehicles a day, roughly 10% of them trucks, projected to reach 2,291 by 2043. The structure is 58 ft (17.7 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesWest Hollis Road
CrossesNissitissit River
Location.1 MI N. Mass. Line
RouteState Highway 0
CountyHillsborough County
StateNew Hampshire
Coordinates42.70524, -71.62072
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating55.1 US tons
Inventory rating33.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length58 ft (17.7 m)
Longest span53 ft (16.2 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,548 (2023)
Projected traffic2,291 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 West Hollis Road over Nissitissit River built?

It was built in 1978, making it 47 years old in 2025.

What condition is West Hollis Road over Nissitissit 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 May 2024.

How much traffic does West Hollis Road over Nissitissit River carry?

About 1,548 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is West Hollis Road over Nissitissit River?

The structure is 58 ft (17.7 m) long with a longest span of 53 ft (16.2 m) and a deck 36 ft wide.

Who owns West Hollis Road over Nissitissit River?

It is owned by the State Highway Agency.