US Bridges

Nh 16 SP Tpk over NH125

Fair

Strafford County, New Hampshire · 7.8 MI N of Rochester Tl · Structure no. 017301140011500

Built
1981
44 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
115 ft
1 main span
Daily traffic
15,006
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nh 16 SP Tpk over NH125 is a steel stringer/multi-beam or girder carrying Nh 16 SP Tpk over NH125 in Strafford County, New Hampshire. It was built in 1981, so it is 44 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 15,006 vehicles a day, roughly 7% of them trucks, projected to reach 22,208 by 2043. The structure is 115 ft (35.1 m) long and 79 ft wide.

Location

Open in Google Maps
CarriesNh 16 SP Tpk
CrossesNH125
Location7.8 MI N of Rochester Tl
RouteState Highway 16
CountyStrafford County
StateNew Hampshire
Coordinates43.48068, -71.00495
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating49.1 US tons
Inventory rating36 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length115 ft (35.1 m)
Longest span110 ft (33.5 m)
Deck width79 ft (24.2 m)
Roadway width75 ft (23 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15,006 (2023)
Projected traffic22,208 by 2043
Trucks7%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes

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 NH125 built?

It was built in 1981, making it 44 years old in 2025.

What condition is Nh 16 SP Tpk over NH125 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 June 2023.

How much traffic does Nh 16 SP Tpk over NH125 carry?

About 15,006 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 16 SP Tpk over NH125?

The structure is 115 ft (35.1 m) long with a longest span of 110 ft (33.5 m) and a deck 79 ft wide.

Who owns Nh 16 SP Tpk over NH125?

It is owned by the State Toll Authority.