US Bridges

High Street over North River

Good

Strafford County, New Hampshire · 0.6 Mi. Tl Epping · Structure no. 014500630004500

Built
2012
13 years old
Condition
Good
inspected October 2024
Type
Slab
Prestressed Concrete
Length
49 ft
1 main span
Daily traffic
165
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

High Street over North River is a prestressed concrete slab carrying High Street over North River in Strafford County, New Hampshire. It was built in 2012, so it is 13 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 165 vehicles a day, roughly 4% of them trucks, projected to reach 244 by 2043. The structure is 49 ft (14.9 m) long and 24 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

CarriesHigh Street
CrossesNorth River
Location0.6 Mi. Tl Epping
Coordinates43.08959, -71.04688
Functional classRural Local

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 protection8 Very GoodNo problems noted.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating66.7 US tons
Inventory rating51.5 US tons

Structure

Structure typeSlab
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length49 ft (14.9 m)
Longest span45 ft (13.7 m)
Deck width24 ft (7.4 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic165 (2023)
Projected traffic244 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
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 High Street over North River built?

It was built in 2012, making it 13 years old in 2025.

What condition is High Street over North 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 October 2024.

How much traffic does High Street over North River carry?

About 165 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is High Street over North River?

The structure is 49 ft (14.9 m) long with a longest span of 45 ft (13.7 m) and a deck 24 ft wide.

Who owns High Street over North River?

It is owned by the City or Municipal Highway Agency.