US Bridges

Gilmore Pond Road over Mountain Brook

Fair

Cheshire County, New Hampshire · 0.6 MI from Nh RTE 124 · Structure no. 013401210009200

Built
1920
105 years old
Condition
Fair
inspected July 2024
Type
Arch - Deck
Masonry
Length
30 ft
1 main span
Daily traffic
628
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Gilmore Pond Road over Mountain Brook is a masonry arch - deck carrying Gilmore Pond Road over Mountain Brook in Cheshire County, New Hampshire. It was built in 1920, so it is 105 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 628 vehicles a day, roughly 4% of them trucks, projected to reach 929 by 2043. The structure is 30 ft (9.1 m) long and 25 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

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CarriesGilmore Pond Road
CrossesMountain Brook
Location0.6 MI from Nh RTE 124
CountyCheshire County
StateNew Hampshire
Coordinates42.81947, -72.05642
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2024
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 adequacy8: Equal to present desirable criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating43.7 US tons
Inventory rating29.2 US tons

Structure

Structure typeArch - Deck
MaterialMasonry
DeckNot applicable
Main spans1
Design loadUnknown
Structure length30 ft (9.1 m)
Longest span24 ft (7.3 m)
Deck width25 ft (7.6 m)
Roadway width22 ft (6.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic628 (2023)
Projected traffic929 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 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 Gilmore Pond Road over Mountain Brook built?

It was built in 1920, making it 105 years old in 2025.

What condition is Gilmore Pond Road over Mountain 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 July 2024.

How much traffic does Gilmore Pond Road over Mountain Brook carry?

About 628 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Gilmore Pond Road over Mountain Brook?

The structure is 30 ft (9.1 m) long with a longest span of 24 ft (7.3 m) and a deck 25 ft wide.

Who owns Gilmore Pond Road over Mountain Brook?

It is owned by the City or Municipal Highway Agency.