US Bridges

Dame Hill Road over Jacobs Brook

Fair

Grafton County, New Hampshire · 100 Ft E. of JCT Nh 25-A · Structure no. 020301000009000

Built
1947
78 years old
Condition
Fair
inspected March 2024
Type
Frame
Concrete
Length
29 ft
1 main span
Daily traffic
256
2023 count
Owner
State
State Highway Agency

About this bridge

Dame Hill Road over Jacobs Brook is a concrete frame carrying Dame Hill Road over Jacobs Brook in Grafton County, New Hampshire. It was built in 1947, so it is 78 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 256 vehicles a day, roughly 4% of them trucks, projected to reach 378 by 2043. The structure is 29 ft (8.8 m) long and 28 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesDame Hill Road
CrossesJacobs Brook
Location100 Ft E. of JCT Nh 25-A
RouteState Highway 0
CountyGrafton County
StateNew Hampshire
Coordinates43.88375, -72.10251
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.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 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 geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating74 US tons
Inventory rating42 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length29 ft (8.8 m)
Longest span28 ft (8.5 m)
Deck width28 ft (8.6 m)
Roadway width25 ft (7.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic256 (2023)
Projected traffic378 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Dame Hill Road over Jacobs Brook built?

It was built in 1947, making it 78 years old in 2025.

What condition is Dame Hill Road over Jacobs 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 March 2024.

How much traffic does Dame Hill Road over Jacobs Brook carry?

About 256 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Dame Hill Road over Jacobs Brook?

The structure is 29 ft (8.8 m) long with a longest span of 28 ft (8.5 m) and a deck 28 ft wide.

Who owns Dame Hill Road over Jacobs Brook?

It is owned by the State Highway Agency.