US Bridges

Lund Road over Salmon Brook

Fair

Hillsborough County, New Hampshire · .1 MI W of E Dunstable RD · Structure no. 017701230007600

Built
1950
75 years old
Condition
Fair
inspected August 2023
Type
Culvert
Concrete
Length
36 ft
4 main spans
Daily traffic
7,604
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Lund Road over Salmon Brook is a concrete culvert carrying Lund Road over Salmon Brook in Hillsborough County, New Hampshire. It was built in 1950, so it is 75 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 7,604 vehicles a day, roughly 3% of them trucks, projected to reach 11,253 by 2043. The structure is 36 ft (11 m) long. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesLund Road
CrossesSalmon Brook
Location.1 MI W of E Dunstable RD
RouteCity Street 0
CountyHillsborough County
StateNew Hampshire
Coordinates42.73531, -71.47099
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating25.2 US tons
Inventory rating20.2 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans4
Design loadH 20
Structure length36 ft (11 m)
Longest span6 ft (1.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,604 (2023)
Projected traffic11,253 by 2043
Trucks3%
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 Lund Road over Salmon Brook built?

It was built in 1950, making it 75 years old in 2025.

What condition is Lund Road over Salmon 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 August 2023.

How much traffic does Lund Road over Salmon Brook carry?

About 7,604 vehicles per day (2023 count), of which roughly 3% are trucks.

How long is Lund Road over Salmon Brook?

The structure is 36 ft (11 m) long with a longest span of 6 ft (1.8 m).

Who owns Lund Road over Salmon Brook?

It is owned by the City or Municipal Highway Agency.