US Bridges

Mallego Road over Mallego Brook

Good

Strafford County, New Hampshire · 0.7 MI FR RTE 125&9 · Structure no. 001501390011600

Built
2020
5 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
44 ft
1 main span
Daily traffic
665
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mallego Road over Mallego Brook is a prestressed concrete box beam or girders - multiple carrying Mallego Road over Mallego Brook in Strafford County, New Hampshire. It was built in 2020, so it is 5 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 good condition with a lowest component rating of 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 665 vehicles a day, roughly 4% of them trucks, projected to reach 984 by 2043. The structure is 44 ft (13.5 m) long and 30 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

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CarriesMallego Road
CrossesMallego Brook
Location0.7 MI FR RTE 125&9
CountyStrafford County
StateNew Hampshire
Coordinates43.20795, -71.00969
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable 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 rating110.1 US tons
Inventory rating93.4 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length44 ft (13.5 m)
Longest span39 ft (11.8 m)
Deck width30 ft (9.2 m)
Roadway width26 ft (7.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic665 (2023)
Projected traffic984 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 statusNot eligible for the National Register of Historic Places
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 Mallego Road over Mallego Brook built?

It was built in 2020, making it 5 years old in 2025.

What condition is Mallego Road over Mallego Brook in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in September 2023.

How much traffic does Mallego Road over Mallego Brook carry?

About 665 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Mallego Road over Mallego Brook?

The structure is 44 ft (13.5 m) long with a longest span of 39 ft (11.8 m) and a deck 30 ft wide.

Who owns Mallego Road over Mallego Brook?

It is owned by the City or Municipal Highway Agency.