US Bridges

Nh 16 SP Tpk over Long Hill Road

Fair

Strafford County, New Hampshire · 1.5 Mi. Rochester Tl. · Structure no. 006500840016500

Built
1956
69 years old, rebuilt 1990
Condition
Fair
inspected April 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
86 ft
3 main spans
Daily traffic
30,695
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nh 16 SP Tpk over Long Hill Road is a steel continuous stringer/multi-beam or girder carrying Nh 16 SP Tpk over Long Hill Road in Strafford County, New Hampshire. It was built in 1956 and reconstructed in 1990, 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 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 30,695 vehicles a day, roughly 8% of them trucks, projected to reach 45,428 by 2043. The structure is 86 ft (26.2 m) long and 95 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesNh 16 SP Tpk
CrossesLong Hill Road
Location1.5 Mi. Rochester Tl.
RouteState Highway 16
CountyStrafford County
StateNew Hampshire
Coordinates43.23288, -70.91183
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionApril 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81 US tons
Inventory rating48 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 25 or greater
Structure length86 ft (26.2 m)
Longest span32 ft (9.8 m)
Deck width95 ft (28.9 m)
Roadway width89 ft (27.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic30,695 (2023)
Projected traffic45,428 by 2043
Trucks8%
Lanes on structure4
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed1.2 mi (2 km)
TollOn a toll road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

Ownership and planned work

OwnerState Toll Authority
Maintained byState Toll Authority
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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 16 SP Tpk over Long Hill Road built?

It was built in 1956, making it 69 years old in 2025. It was reconstructed in 1990.

What condition is Nh 16 SP Tpk over Long Hill Road 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 April 2023.

How much traffic does Nh 16 SP Tpk over Long Hill Road carry?

About 30,695 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Nh 16 SP Tpk over Long Hill Road?

The structure is 86 ft (26.2 m) long with a longest span of 32 ft (9.8 m) and a deck 95 ft wide.

Who owns Nh 16 SP Tpk over Long Hill Road?

It is owned by the State Toll Authority.