US Bridges

US302 over Saco River

Good

Carroll County, New Hampshire · 1.7 MI SW of RTE 16 · Structure no. 001701900013000

Built
2008
17 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
234 ft
2 main spans
Daily traffic
4,065
2023 count
Owner
State
State Highway Agency

About this bridge

US302 over Saco River is a steel continuous stringer/multi-beam or girder carrying US302 over Saco River in Carroll County, New Hampshire. It was built in 2008, so it is 17 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 4,065 vehicles a day, roughly 7% of them trucks, projected to reach 6,016 by 2043. The structure is 234 ft (71.2 m) long and 35 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesUS302
CrossesSaco River
Location1.7 MI SW of RTE 16
RouteU.S. Route 302
CountyCarroll County
StateNew Hampshire
Coordinates44.09527, -71.20307
Functional classRural Principal Arterial - Other

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.2 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, precast panels
Main spans2
Design loadHS 25 or greater
Structure length234 ft (71.2 m)
Longest span112 ft (34.1 m)
Deck width35 ft (10.7 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,065 (2023)
Projected traffic6,016 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US302 over Saco River built?

It was built in 2008, making it 17 years old in 2025.

What condition is US302 over Saco 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 June 2024.

How much traffic does US302 over Saco River carry?

About 4,065 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is US302 over Saco River?

The structure is 234 ft (71.2 m) long with a longest span of 112 ft (34.1 m) and a deck 35 ft wide.

Who owns US302 over Saco River?

It is owned by the State Highway Agency.