US Bridges

Dewing Road over Weeks Brook

Good

Carroll County, New Hampshire · 0.3MI FR Conway Tl · Structure no. 004303090010700

Built
1969
56 years old
Condition
Good
inspected August 2023
Type
Frame
Concrete
Length
27 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dewing Road over Weeks Brook is a concrete frame carrying Dewing Road over Weeks Brook in Carroll County, New Hampshire. It was built in 1969, so it is 56 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 96 vehicles a day, projected to reach 142 by 2043. The structure is 27 ft (8.2 m) long and 28 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesDewing Road
CrossesWeeks Brook
Location0.3MI FR Conway Tl
CountyCarroll County
StateNew Hampshire
Coordinates44.07844, -71.0286
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating50 US tons
Inventory rating36 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width28 ft (8.5 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Dewing Road over Weeks Brook built?

It was built in 1969, making it 56 years old in 2025.

What condition is Dewing Road over Weeks Brook 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 August 2023.

How much traffic does Dewing Road over Weeks Brook carry?

About 96 vehicles per day (2023 count).

How long is Dewing Road over Weeks Brook?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 28 ft wide.

Who owns Dewing Road over Weeks Brook?

It is owned by the City or Municipal Highway Agency.