US Bridges

Bordeau Road over Stratford Bog Brook

Fair

Coos County, New Hampshire · 3.1 Mi. US3 · Structure no. 024401310011700

Built
1970
55 years old
Condition
Fair
inspected August 2023
Type
Culvert
Steel
Length
29 ft
2 main spans
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Bordeau Road over Stratford Bog Brook is a steel culvert carrying Bordeau Road over Stratford Bog Brook in Coos County, New Hampshire. It was built in 1970, so it is 55 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 5 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 96 vehicles a day, roughly 4% of them trucks, projected to reach 142 by 2043. The structure is 29 ft (8.8 m) long. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesBordeau Road
CrossesStratford Bog Brook
Location3.1 Mi. US3
CountyCoos County
StateNew Hampshire
Coordinates44.68739, -71.52819
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.1 US tons
Inventory rating51.5 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckNot applicable
Main spans2
Design loadUnknown
Structure length29 ft (8.8 m)
Longest span13 ft (4 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 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 Bordeau Road over Stratford Bog Brook built?

It was built in 1970, making it 55 years old in 2025.

What condition is Bordeau Road over Stratford Bog 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 August 2023.

How much traffic does Bordeau Road over Stratford Bog Brook carry?

About 96 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Bordeau Road over Stratford Bog Brook?

The structure is 29 ft (8.8 m) long with a longest span of 13 ft (4 m).

Who owns Bordeau Road over Stratford Bog Brook?

It is owned by the City or Municipal Highway Agency.