US Bridges

River Street over Saco River Overflow

Good

Carroll County, New Hampshire · 0.50 M. from US302 · Structure no. 001701090011400

Built
2015
10 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
23 ft
2 main spans
Daily traffic
473
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

River Street over Saco River Overflow is a concrete culvert carrying River Street over Saco River Overflow in Carroll County, New Hampshire. It was built in 2015, so it is 10 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 473 vehicles a day, roughly 4% of them trucks, projected to reach 700 by 2043. The structure is 23 ft (6.9 m) long. If it were closed, the detour would be 1.2 mi (2 km).

CarriesRiver Street
CrossesSaco River Overflow
Location0.50 M. from US302
Coordinates44.08387, -71.2855
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert8 Very GoodNo problems noted.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.8 US tons
Inventory rating60.1 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length23 ft (6.9 m)
Longest span10 ft (3.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic473 (2023)
Projected traffic700 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 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 River Street over Saco River Overflow built?

It was built in 2015, making it 10 years old in 2025.

What condition is River Street over Saco River Overflow 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 2024.

How much traffic does River Street over Saco River Overflow carry?

About 473 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is River Street over Saco River Overflow?

The structure is 23 ft (6.9 m) long with a longest span of 10 ft (3.1 m).

Who owns River Street over Saco River Overflow?

It is owned by the City or Municipal Highway Agency.