US Bridges

Gale Chandler Road over Mill Brook

Fair

Grafton County, New Hampshire · 100 Ft FR Brook RD · Structure no. 014201050012800

Built
1922
103 years old
Condition
Fair
inspected September 2024
Type
Arch - Deck
Concrete
Length
26 ft
1 main span
Daily traffic
118
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gale Chandler Road over Mill Brook is a concrete arch - deck carrying Gale Chandler Road over Mill Brook in Grafton County, New Hampshire. It was built in 1922, so it is 103 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 5 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 118 vehicles a day, roughly 4% of them trucks, projected to reach 174 by 2043. The structure is 26 ft (7.9 m) long and 23 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesGale Chandler Road
CrossesMill Brook
Location100 Ft FR Brook RD
CountyGrafton County
StateNew Hampshire
Coordinates44.16737, -71.89085
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
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 rating44.3 US tons
Inventory rating31.7 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length26 ft (7.9 m)
Longest span26 ft (7.9 m)
Deck width23 ft (7.1 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic118 (2023)
Projected traffic174 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Gale Chandler Road over Mill Brook built?

It was built in 1922, making it 103 years old in 2025.

What condition is Gale Chandler Road over Mill 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 September 2024.

How much traffic does Gale Chandler Road over Mill Brook carry?

About 118 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Gale Chandler Road over Mill Brook?

The structure is 26 ft (7.9 m) long with a longest span of 26 ft (7.9 m) and a deck 23 ft wide.

Who owns Gale Chandler Road over Mill Brook?

It is owned by the City or Municipal Highway Agency.