US Bridges

US 3 over Stratford Bog Brook

Good

Coos County, New Hampshire · 0.9 MI Northumberland Tl · Structure no. 024401040006700

Built
2001
24 years old
Condition
Good
inspected June 2023
Type
Culvert
Concrete
Length
51 ft
1 main span
Daily traffic
3,019
2023 count
Owner
State
State Highway Agency

About this bridge

US 3 over Stratford Bog Brook is a concrete culvert carrying US 3 over Stratford Bog Brook in Coos County, New Hampshire. It was built in 2001, so it is 24 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 3,019 vehicles a day, roughly 14% of them trucks, projected to reach 4,468 by 2043. The structure is 51 ft (15.6 m) long.

CarriesUS 3
CrossesStratford Bog Brook
Location0.9 MI Northumberland Tl
RouteU.S. Route 3
Coordinates44.65176, -71.55749
Functional classRural Minor Arterial

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 protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionJune 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating99 US tons
Inventory rating99 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 25 or greater
Structure length51 ft (15.6 m)
Longest span51 ft (15.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,019 (2023)
Projected traffic4,468 by 2043
Trucks14%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 US 3 over Stratford Bog Brook built?

It was built in 2001, making it 24 years old in 2025.

What condition is US 3 over Stratford 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 2023.

How much traffic does US 3 over Stratford Bog Brook carry?

About 3,019 vehicles per day (2023 count), of which roughly 14% are trucks.

How long is US 3 over Stratford Bog Brook?

The structure is 51 ft (15.6 m) long with a longest span of 51 ft (15.6 m).

Who owns US 3 over Stratford Bog Brook?

It is owned by the State Highway Agency.