US Bridges

Nh 16 SP Tpk over Nh 16 Connector

Good

Strafford County, New Hampshire · 2.5 MI S of Milton Tl · Structure no. 022200950009700

Built
1978
47 years old, rebuilt 2012
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
107 ft
1 main span
Daily traffic
23,195
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nh 16 SP Tpk over Nh 16 Connector is a steel stringer/multi-beam or girder carrying Nh 16 SP Tpk over Nh 16 Connector in Strafford County, New Hampshire. It was built in 1978 and reconstructed in 2012, 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 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 23,195 vehicles a day, roughly 8% of them trucks, projected to reach 34,328 by 2043. The structure is 107 ft (32.7 m) long and 129 ft wide.

Location

Open in Google Maps
CarriesNh 16 SP Tpk
CrossesNh 16 Connector
Location2.5 MI S of Milton Tl
RouteState Highway 16
CountyStrafford County
StateNew Hampshire
Coordinates43.32746, -70.98589
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 rating93.1 US tons
Inventory rating55.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length107 ft (32.7 m)
Longest span103 ft (31.5 m)
Deck width129 ft (39.2 m)
Roadway width125 ft (38 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,195 (2023)
Projected traffic34,328 by 2043
Trucks8%
Lanes on structure5
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 Nh 16 Connector built?

It was built in 1978, making it 47 years old in 2025. It was reconstructed in 2012.

What condition is Nh 16 SP Tpk over Nh 16 Connector 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 over Nh 16 Connector carry?

About 23,195 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Nh 16 SP Tpk over Nh 16 Connector?

The structure is 107 ft (32.7 m) long with a longest span of 103 ft (31.5 m) and a deck 129 ft wide.

Who owns Nh 16 SP Tpk over Nh 16 Connector?

It is owned by the State Toll Authority.