US Bridges

Dunklee Road over Bow Bog Brook

Good

Merrimack County, New Hampshire · 0.16 MI from RTE 3-A · Structure no. 002701820011300

Built
2006
19 years old
Condition
Good
inspected June 2024
Type
Culvert
Concrete
Length
22 ft
1 main span
Daily traffic
2,172
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Dunklee Road over Bow Bog Brook is a concrete culvert carrying Dunklee Road over Bow Bog Brook in Merrimack County, New Hampshire. It was built in 2006, so it is 19 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 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,172 vehicles a day, roughly 4% of them trucks, projected to reach 3,214 by 2043. The structure is 22 ft (6.7 m) long. If it were closed, the detour would be 3.1 mi (5 km).

CarriesDunklee Road
CrossesBow Bog Brook
Location0.16 MI from RTE 3-A
Coordinates43.13646, -71.48486
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating75.2 US tons
Inventory rating45 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadUnknown
Structure length22 ft (6.7 m)
Longest span20 ft (6.1 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,172 (2023)
Projected traffic3,214 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.1 mi (5 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 Dunklee Road over Bow Bog Brook built?

It was built in 2006, making it 19 years old in 2025.

What condition is Dunklee Road over Bow Bog 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 June 2024.

How much traffic does Dunklee Road over Bow Bog Brook carry?

About 2,172 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Dunklee Road over Bow Bog Brook?

The structure is 22 ft (6.7 m) long with a longest span of 20 ft (6.1 m).

Who owns Dunklee Road over Bow Bog Brook?

It is owned by the City or Municipal Highway Agency.