US Bridges

River Road over CSX

Good

Merrimack County, New Hampshire · 1.4 MI from Hooksett Tl · Structure no. 002701940011500

Built
1989
36 years old
Condition
Good
inspected June 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
567
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

River Road over CSX is a steel stringer/multi-beam or girder carrying River Road over CSX in Merrimack County, New Hampshire. It was built in 1989, so it is 36 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 567 vehicles a day, roughly 4% of them trucks, projected to reach 839 by 2043. The structure is 50 ft (15.2 m) long and 31 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesRiver Road
CrossesCSX
Location1.4 MI from Hooksett Tl
CountyMerrimack County
StateNew Hampshire
Coordinates43.13817, -71.47263
Functional classUrban Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating91.1 US tons
Inventory rating54.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length50 ft (15.2 m)
Longest span46 ft (14 m)
Deck width31 ft (9.4 m)
Roadway width27 ft (8.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic567 (2023)
Projected traffic839 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was River Road over CSX built?

It was built in 1989, making it 36 years old in 2025.

What condition is River Road over CSX 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 River Road over CSX carry?

About 567 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is River Road over CSX?

The structure is 50 ft (15.2 m) long with a longest span of 46 ft (14 m) and a deck 31 ft wide.

Who owns River Road over CSX?

It is owned by the City or Municipal Highway Agency.