US Bridges

Nh 16 SP Tpk Ramp over NH125

Good

Strafford County, New Hampshire · 3.25 MI N Dover T/L · Structure no. 022201580011000

Built
2009
16 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
148 ft
1 main span
Daily traffic
44,530
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nh 16 SP Tpk Ramp over NH125 is a steel stringer/multi-beam or girder carrying Nh 16 SP Tpk Ramp over NH125 in Strafford County, New Hampshire. It was built in 2009, so it is 16 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 44,530 vehicles a day, roughly 8% of them trucks, projected to reach 65,904 by 2043. The structure is 148 ft (45.1 m) long and 145 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesNh 16 SP Tpk Ramp
CrossesNH125
Location3.25 MI N Dover T/L
RouteState Highway 16
CountyStrafford County
StateNew Hampshire
Coordinates43.28233, -70.97934
Functional classUrban Principal Arterial - Other Freeway or Expressway

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating79.7 US tons
Inventory rating47.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length148 ft (45.1 m)
Longest span144 ft (43.9 m)
Deck width145 ft (44.2 m)
Roadway width139 ft (42.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic44,530 (2023)
Projected traffic65,904 by 2043
Trucks8%
Lanes on structure5
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

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

Frequently asked questions

When was Nh 16 SP Tpk Ramp over NH125 built?

It was built in 2009, making it 16 years old in 2025.

What condition is Nh 16 SP Tpk Ramp over NH125 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 July 2023.

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

About 44,530 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Nh 16 SP Tpk Ramp over NH125?

The structure is 148 ft (45.1 m) long with a longest span of 144 ft (43.9 m) and a deck 145 ft wide.

Who owns Nh 16 SP Tpk Ramp over NH125?

It is owned by the State Toll Authority.