US Bridges

SP Tpk NB Off Ramp over Cocheco River

Good

Strafford County, New Hampshire · NB Off-Ramp over Cocheco · Structure no. 022201570011300

Built
2010
15 years old
Condition
Good
inspected July 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
179 ft
1 main span
Daily traffic
1,233
2023 count
Owner
Toll Authority
State Toll Authority

About this bridge

SP Tpk NB Off Ramp over Cocheco River is a steel stringer/multi-beam or girder carrying SP Tpk NB Off Ramp over Cocheco River in Strafford County, New Hampshire. It was built in 2010, so it is 15 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 1,233 vehicles a day, roughly 8% of them trucks, projected to reach 1,824 by 2043. The structure is 179 ft (54.5 m) long and 35 ft wide.

Location

Open in Google Maps
CarriesSP Tpk NB Off Ramp
CrossesCocheco River
LocationNB Off-Ramp over Cocheco
CountyStrafford County
StateNew Hampshire
Coordinates43.28188, -70.9772
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.
Channel and channel protection9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating99 US tons
Inventory rating52.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length179 ft (54.5 m)
Longest span179 ft (54.5 m)
Deck width35 ft (10.7 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,233 (2023)
Projected traffic1,824 by 2043
Trucks8%
Lanes on structure1
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a toll road
National Highway SystemYes

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)
NavigationNo navigation control on waterway

Frequently asked questions

When was SP Tpk NB Off Ramp over Cocheco River built?

It was built in 2010, making it 15 years old in 2025.

What condition is SP Tpk NB Off Ramp over Cocheco 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 2023.

How much traffic does SP Tpk NB Off Ramp over Cocheco River carry?

About 1,233 vehicles per day (2023 count), of which roughly 8% are trucks.

How long is SP Tpk NB Off Ramp over Cocheco River?

The structure is 179 ft (54.5 m) long with a longest span of 179 ft (54.5 m) and a deck 35 ft wide.

Who owns SP Tpk NB Off Ramp over Cocheco River?

It is owned by the State Toll Authority.