US Bridges

Dodge Road over Pettyboro Brook

Fair

Grafton County, New Hampshire · 1.5 MI FR Lisbon Tl · Structure no. 001801310014500

Built
1972
53 years old, rebuilt 2022
Condition
Fair
inspected October 2023
Type
Slab
Concrete
Length
23 ft
1 main span
Daily traffic
243
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dodge Road over Pettyboro Brook is a concrete slab carrying Dodge Road over Pettyboro Brook in Grafton County, New Hampshire. It was built in 1972 and reconstructed in 2022, so it is 53 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 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 243 vehicles a day, roughly 4% of them trucks, projected to reach 359 by 2043. The structure is 23 ft (7 m) long and 25 ft wide. If it were closed, the detour would be 6.2 mi (10 km).

Location

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CarriesDodge Road
CrossesPettyboro Brook
Location1.5 MI FR Lisbon Tl
CountyGrafton County
StateNew Hampshire
Coordinates44.20224, -71.962
Functional classRural Local

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 protection7 GoodSome minor problems.
Last inspectionOctober 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 adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating46 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length23 ft (7 m)
Longest span20 ft (6.1 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic243 (2023)
Projected traffic359 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.2 mi (10 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Dodge Road over Pettyboro Brook built?

It was built in 1972, making it 53 years old in 2025. It was reconstructed in 2022.

What condition is Dodge Road over Pettyboro 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 October 2023.

How much traffic does Dodge Road over Pettyboro Brook carry?

About 243 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Dodge Road over Pettyboro Brook?

The structure is 23 ft (7 m) long with a longest span of 20 ft (6.1 m) and a deck 25 ft wide.

Who owns Dodge Road over Pettyboro Brook?

It is owned by the City or Municipal Highway Agency.