US Bridges

NH114 over Warner River

Fair

Merrimack County, New Hampshire · 3.8 MI from Warner Tl · Structure no. 002801460014000

Built
1948
77 years old
Condition
Fair
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
87 ft
1 main span
Daily traffic
4,002
2023 count
Owner
State
State Highway Agency

About this bridge

NH114 over Warner River is a steel stringer/multi-beam or girder carrying NH114 over Warner River in Merrimack County, New Hampshire. It was built in 1948, so it is 77 years old, older than the New Hampshire average of 56.9 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 4,002 vehicles a day, roughly 4% of them trucks, projected to reach 5,922 by 2043. The structure is 87 ft (26.5 m) long and 34 ft wide. If it were closed, the detour would be 24.9 mi (40 km).

Location

Open in Google Maps
CarriesNH114
CrossesWarner River
Location3.8 MI from Warner Tl
RouteState Highway 114
CountyMerrimack County
StateNew Hampshire
Coordinates43.25963, -71.94581
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating58.3 US tons
Inventory rating35.1 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 20
Structure length87 ft (26.5 m)
Longest span77 ft (23.5 m)
Deck width34 ft (10.5 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,002 (2023)
Projected traffic5,922 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed24.9 mi (40 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
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 NH114 over Warner River built?

It was built in 1948, making it 77 years old in 2025.

What condition is NH114 over Warner River in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in April 2024.

How much traffic does NH114 over Warner River carry?

About 4,002 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH114 over Warner River?

The structure is 87 ft (26.5 m) long with a longest span of 77 ft (23.5 m) and a deck 34 ft wide.

Who owns NH114 over Warner River?

It is owned by the State Highway Agency.