US Bridges

NH118 over Indian River

Poor

Grafton County, New Hampshire · 2.3 MI from Dorchester Tl · Structure no. 003601770012300

Built
1948
77 years old
Condition
Poor
inspected November 2024
Type
Frame
Concrete
Length
35 ft
1 main span
Daily traffic
1,436
2023 count
Owner
State
State Highway Agency

About this bridge

NH118 over Indian River is a concrete frame carrying NH118 over Indian River in Grafton 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 1,436 vehicles a day, roughly 4% of them trucks, projected to reach 2,125 by 2043. The structure is 35 ft (10.7 m) long and 28 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

CarriesNH118
CrossesIndian River
Location2.3 MI from Dorchester Tl
RouteState Highway 118
Coordinates43.67892, -71.99647
Functional classRural Major Collector

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 8 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
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 rating51.8 US tons
Inventory rating31 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length35 ft (10.7 m)
Longest span32 ft (9.8 m)
Deck width28 ft (8.5 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,436 (2023)
Projected traffic2,125 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 NH118 over Indian River built?

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

What condition is NH118 over Indian River in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does NH118 over Indian River carry?

About 1,436 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH118 over Indian River?

The structure is 35 ft (10.7 m) long with a longest span of 32 ft (9.8 m) and a deck 28 ft wide.

Who owns NH118 over Indian River?

It is owned by the State Highway Agency.