US Bridges

Nh 16 SP Tpk over Nhncrr

Fair

Strafford County, New Hampshire · 5.7 MI N of Rochester Tl · Structure no. 017301410012200

Built
1980
45 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
62 ft
1 main span
Daily traffic
14,518
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

Nh 16 SP Tpk over Nhncrr is a steel stringer/multi-beam or girder carrying Nh 16 SP Tpk over Nhncrr in Strafford County, New Hampshire. It was built in 1980, so it is 45 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 14,518 vehicles a day, roughly 7% of them trucks, projected to reach 21,486 by 2043. The structure is 62 ft (18.9 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
CrossesNhncrr
Location5.7 MI N of Rochester Tl
CountyStrafford County
StateNew Hampshire
Coordinates43.45103, -70.99546
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.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to 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 rating35.3 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length62 ft (18.9 m)
Longest span57 ft (17.4 m)
Deck width47 ft (14.2 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,518 (2023)
Projected traffic21,486 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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 Nhncrr built?

It was built in 1980, making it 45 years old in 2025.

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

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

How long is Nh 16 SP Tpk over Nhncrr?

The structure is 62 ft (18.9 m) long with a longest span of 57 ft (17.4 m) and a deck 47 ft wide.

Who owns Nh 16 SP Tpk over Nhncrr?

It is owned by the State Toll Authority.