US Bridges

Hollow Road over Stratford Bog Brook

Fair

Coos County, New Hampshire · 0.5 MI East US 3 · Structure no. 024401050007000

Built
1924
101 years old
Condition
Fair
inspected April 2024
Type
Tee Beam
Concrete
Length
27 ft
1 main span
Daily traffic
34
2023 count
Owner
State
State Highway Agency

About this bridge

Hollow Road over Stratford Bog Brook is a concrete tee beam carrying Hollow Road over Stratford Bog Brook in Coos County, New Hampshire. It was built in 1924, so it is 101 years old, older 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 34 vehicles a day, roughly 4% of them trucks, projected to reach 50 by 2043. The structure is 27 ft (8.2 m) long and 36 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

Open in Google Maps
CarriesHollow Road
CrossesStratford Bog Brook
Location0.5 MI East US 3
RouteState Highway 0
CountyCoos County
StateNew Hampshire
Coordinates44.65398, -71.55611
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
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionApril 2024
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
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating28 US tons
Inventory rating18 US tons

Structure

Structure typeTee Beam
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadH 15
Structure length27 ft (8.2 m)
Longest span25 ft (7.6 m)
Deck width36 ft (11.1 m)
Roadway width33 ft (10 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic34 (2023)
Projected traffic50 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Hollow Road over Stratford Bog Brook built?

It was built in 1924, making it 101 years old in 2025.

What condition is Hollow 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 April 2024.

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

About 34 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Hollow Road over Stratford Bog Brook?

The structure is 27 ft (8.2 m) long with a longest span of 25 ft (7.6 m) and a deck 36 ft wide.

Who owns Hollow Road over Stratford Bog Brook?

It is owned by the State Highway Agency.