US Bridges

Bow Lake Road over Sherburne Brook

Good

Rockingham County, New Hampshire · 0.75 Strafford Tl · Structure no. 020000950011300

Built
2021
4 years old
Condition
Good
inspected October 2024
Type
Frame
Concrete
Length
25 ft
1 main span
Daily traffic
662
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bow Lake Road over Sherburne Brook is a concrete frame carrying Bow Lake Road over Sherburne Brook in Rockingham County, New Hampshire. It was built in 2021, so it is 4 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 662 vehicles a day, roughly 10% of them trucks, projected to reach 979 by 2043. The structure is 25 ft (7.7 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

CarriesBow Lake Road
CrossesSherburne Brook
Location0.75 Strafford Tl
Coordinates43.23534, -71.20129
Functional classRural Minor Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionOctober 2024
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 alignment7: Better than present minimum criteria
Operating rating58.4 US tons
Inventory rating44.9 US tons

Structure

Structure typeFrame
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHL 93
Structure length25 ft (7.7 m)
Longest span25 ft (7.7 m)
Deck width29 ft (8.7 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic662 (2023)
Projected traffic979 by 2043
Trucks10%
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 Bow Lake Road over Sherburne Brook built?

It was built in 2021, making it 4 years old in 2025.

What condition is Bow Lake Road over Sherburne 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 October 2024.

How much traffic does Bow Lake Road over Sherburne Brook carry?

About 662 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Bow Lake Road over Sherburne Brook?

The structure is 25 ft (7.7 m) long with a longest span of 25 ft (7.7 m) and a deck 29 ft wide.

Who owns Bow Lake Road over Sherburne Brook?

It is owned by the City or Municipal Highway Agency.