US Bridges

NH118 over Blodgett Brook

Fair

Grafton County, New Hampshire · 3.3 MI from Woodstock Tl · Structure no. 026401800012800

Built
1960
65 years old
Condition
Fair
inspected April 2023
Type
Slab
Concrete
Length
31 ft
1 main span
Daily traffic
1,732
2023 count
Owner
State
State Highway Agency

About this bridge

NH118 over Blodgett Brook is a concrete slab carrying NH118 over Blodgett Brook in Grafton County, New Hampshire. It was built in 1960, so it is 65 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 1,732 vehicles a day, roughly 4% of them trucks, projected to reach 2,563 by 2043. The structure is 31 ft (9.3 m) long and 30 ft wide. If it were closed, the detour would be 36 mi (58 km).

Location

Open in Google Maps
CarriesNH118
CrossesBlodgett Brook
Location3.3 MI from Woodstock Tl
RouteState Highway 118
CountyGrafton County
StateNew Hampshire
Coordinates43.95635, -71.83173
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionApril 2023
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating63.2 US tons
Inventory rating37.8 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length31 ft (9.3 m)
Longest span28 ft (8.5 m)
Deck width30 ft (9.1 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,732 (2023)
Projected traffic2,563 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed36 mi (58 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 Blodgett Brook built?

It was built in 1960, making it 65 years old in 2025.

What condition is NH118 over Blodgett Brook 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 2023.

How much traffic does NH118 over Blodgett Brook carry?

About 1,732 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is NH118 over Blodgett Brook?

The structure is 31 ft (9.3 m) long with a longest span of 28 ft (8.5 m) and a deck 30 ft wide.

Who owns NH118 over Blodgett Brook?

It is owned by the State Highway Agency.