US Bridges

Nh 16 SP Tpk over Branch River

Good

Strafford County, New Hampshire · 0.8 MI S. of Wakefield Tl · Structure no. 017300980011500

Built
1981
44 years old
Condition
Good
inspected July 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
164 ft
2 main spans
Daily traffic
14,518
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nh 16 SP Tpk over Branch River is a steel continuous stringer/multi-beam or girder carrying Nh 16 SP Tpk over Branch River 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,518 vehicles a day, roughly 7% of them trucks, projected to reach 21,486 by 2043. The structure is 164 ft (50.1 m) long and 59 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNh 16 SP Tpk
CrossesBranch River
Location0.8 MI S. of Wakefield Tl
RouteState Highway 16
Coordinates43.48194, -71.00549
Functional classRural Principal Arterial - Other

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.1 US tons
Inventory rating31.9 US tons

Structure

MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20 + Mod
Structure length164 ft (50.1 m)
Longest span80 ft (24.4 m)
Deck width59 ft (17.9 m)
Roadway width54 ft (16.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,518 (2023)
Projected traffic21,486 by 2043
Trucks7%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nh 16 SP Tpk over Branch River built?

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

What condition is Nh 16 SP Tpk over Branch River 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 2024.

How much traffic does Nh 16 SP Tpk over Branch River carry?

About 14,518 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 16 SP Tpk over Branch River?

The structure is 164 ft (50.1 m) long with a longest span of 80 ft (24.4 m) and a deck 59 ft wide.

Who owns Nh 16 SP Tpk over Branch River?

It is owned by the State Toll Authority.