US Bridges

Marlboro Street over Beaver Brook

Fair

Cheshire County, New Hampshire · 0.4 MI East JCT Nh 10 · Structure no. 013601430006600

Built
1978
47 years old
Condition
Fair
inspected July 2023
Type
Slab
Concrete Continuous
Length
25 ft
3 main spans
Daily traffic
4,228
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Marlboro Street over Beaver Brook is a concrete continuous slab carrying Marlboro Street over Beaver Brook in Cheshire County, New Hampshire. It was built in 1978, so it is 47 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 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 4,228 vehicles a day, roughly 5% of them trucks, projected to reach 6,257 by 2043. The structure is 25 ft (7.6 m) long and 63 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesMarlboro Street
CrossesBeaver Brook
Location0.4 MI East JCT Nh 10
RouteCity Street 0
CountyCheshire County
StateNew Hampshire
Coordinates42.92601, -72.2704
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 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
Deck geometry6: Equal to present minimum criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating27 US tons
Inventory rating19.3 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length25 ft (7.6 m)
Longest span7 ft (2.1 m)
Deck width63 ft (19.1 m)
Roadway width40 ft (12.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic4,228 (2023)
Projected traffic6,257 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 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 Marlboro Street over Beaver Brook built?

It was built in 1978, making it 47 years old in 2025.

What condition is Marlboro Street over Beaver 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 2023.

How much traffic does Marlboro Street over Beaver Brook carry?

About 4,228 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Marlboro Street over Beaver Brook?

The structure is 25 ft (7.6 m) long with a longest span of 7 ft (2.1 m) and a deck 63 ft wide.

Who owns Marlboro Street over Beaver Brook?

It is owned by the City or Municipal Highway Agency.