US Bridges

I-95 SB over US 4 Nh 16 SP Tpk

Fair

Rockingham County, New Hampshire · I-95 SP Tpk Interchange · Structure no. 021701980012300

Built
1970
55 years old
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
127 ft
1 main span
Daily traffic
35,888
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

I-95 SB over US 4 Nh 16 SP Tpk is a steel stringer/multi-beam or girder carrying I-95 SB over US 4 Nh 16 SP Tpk in Rockingham County, New Hampshire. It was built in 1970, so it is 55 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 35,888 vehicles a day, roughly 6% of them trucks, projected to reach 53,114 by 2043. The structure is 127 ft (38.7 m) long and 63 ft wide.

Location

Open in Google Maps
CarriesI-95 SB
CrossesUS 4 Nh 16 SP Tpk
LocationI-95 SP Tpk Interchange
RouteInterstate 95
CountyRockingham County
StateNew Hampshire
Coordinates43.07445, -70.78273
Functional classUrban Principal Arterial - Interstate

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating56.2 US tons
Inventory rating33.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20 + Mod
Structure length127 ft (38.7 m)
Longest span122 ft (37.2 m)
Deck width63 ft (19.1 m)
Roadway width58 ft (17.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic35,888 (2023)
Projected traffic53,114 by 2043
Trucks6%
Lanes on structure3
Traffic directionOne-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
TollOn a free road
National Highway SystemYes
Strategic Highway NetworkInterstate STRAHNET route

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 I-95 SB over US 4 Nh 16 SP Tpk built?

It was built in 1970, making it 55 years old in 2025.

What condition is I-95 SB over US 4 Nh 16 SP Tpk 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 I-95 SB over US 4 Nh 16 SP Tpk carry?

About 35,888 vehicles per day (2023 count), of which roughly 6% are trucks.

How long is I-95 SB over US 4 Nh 16 SP Tpk?

The structure is 127 ft (38.7 m) long with a longest span of 122 ft (37.2 m) and a deck 63 ft wide.

Who owns I-95 SB over US 4 Nh 16 SP Tpk?

It is owned by the State Toll Authority.