US Bridges

Nh 16 SP Tpk over Betts Road

Good

Strafford County, New Hampshire · 1.1 MI S of Milton Tl · Structure no. 022200510009400

Built
1978
47 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
96 ft
1 main span
Daily traffic
16,645
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nh 16 SP Tpk over Betts Road is a steel stringer/multi-beam or girder carrying Nh 16 SP Tpk over Betts Road in Strafford County, New Hampshire. It was built in 1978, 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 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 16,645 vehicles a day, roughly 8% of them trucks, projected to reach 24,634 by 2043. The structure is 96 ft (29.3 m) long and 47 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

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CarriesNh 16 SP Tpk
CrossesBetts Road
Location1.1 MI S of Milton Tl
RouteState Highway 16
CountyStrafford County
StateNew Hampshire
Coordinates43.35874, -70.98673
Functional classUrban Other Principal Arterial

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.
Substructure8 Very GoodNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length96 ft (29.3 m)
Longest span90 ft (27.4 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,645 (2023)
Projected traffic24,634 by 2043
Trucks8%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed8.1 mi (13 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 16 SP Tpk over Betts Road built?

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

What condition is Nh 16 SP Tpk over Betts Road 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 Betts Road carry?

About 16,645 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is Nh 16 SP Tpk over Betts Road?

The structure is 96 ft (29.3 m) long with a longest span of 90 ft (27.4 m) and a deck 47 ft wide.

Who owns Nh 16 SP Tpk over Betts Road?

It is owned by the State Toll Authority.