US Bridges

Dewey Hill Road over Phillips Brook

Good

Coos County, New Hampshire · 0.5 MI FR Dummer Tl · Structure no. 024000910016800

Built
1996
29 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
36 ft
1 main span
Daily traffic
43
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dewey Hill Road over Phillips Brook is a steel stringer/multi-beam or girder carrying Dewey Hill Road over Phillips Brook in Coos County, New Hampshire. It was built in 1996, so it is 29 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 43 vehicles a day, roughly 4% of them trucks, projected to reach 63 by 2043. The structure is 36 ft (11 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesDewey Hill Road
CrossesPhillips Brook
Location0.5 MI FR Dummer Tl
CountyCoos County
StateNew Hampshire
Coordinates44.61962, -71.32975
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.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.8 US tons
Inventory rating45 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckCorrugated steel
Main spans1
Design loadHS 25 or greater
Structure length36 ft (11 m)
Longest span31 ft (9.4 m)
Deck width24 ft (7.3 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic43 (2023)
Projected traffic63 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

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusNot eligible for the National Register of Historic Places
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 Dewey Hill Road over Phillips Brook built?

It was built in 1996, making it 29 years old in 2025.

What condition is Dewey Hill Road over Phillips 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 September 2024.

How much traffic does Dewey Hill Road over Phillips Brook carry?

About 43 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Dewey Hill Road over Phillips Brook?

The structure is 36 ft (11 m) long with a longest span of 31 ft (9.4 m) and a deck 24 ft wide.

Who owns Dewey Hill Road over Phillips Brook?

It is owned by the City or Municipal Highway Agency.