US Bridges

Submarine Way over North Mill Pond

Fair

Rockingham County, New Hampshire · 0.1 from Sarah Long Br. · Structure no. 021702410010800

Built
1984
41 years old, rebuilt 2019
Condition
Fair
inspected June 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
10
2009 count
Owner
State
State Highway Agency

About this bridge

Submarine Way over North Mill Pond is a steel stringer/multi-beam or girder carrying Submarine Way over North Mill Pond in Rockingham County, New Hampshire. It was built in 1984 and reconstructed in 2019, so it is 41 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 6 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 10 vehicles a day, roughly 5% of them trucks, projected to reach 14 by 2029. The structure is 52 ft (15.8 m) long and 56 ft wide.

CarriesSubmarine Way
CrossesNorth Mill Pond
Location0.1 from Sarah Long Br.
Coordinates43.08346, -70.76571
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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection9 ExcellentNo problems noted.
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
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment9: Superior to present desirable criteria
Operating rating52.2 US tons
Inventory rating31.3 US tons

Structure

MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length52 ft (15.8 m)
Longest span49 ft (14.9 m)
Deck width56 ft (17.1 m)
Roadway width42 ft (12.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10 (2009)
Projected traffic14 by 2029
Trucks5%
Lanes on structure3
Traffic directionTwo-way traffic
CarriesHighway
CrossesRelief for waterway
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 Submarine Way over North Mill Pond built?

It was built in 1984, making it 41 years old in 2025. It was reconstructed in 2019.

What condition is Submarine Way over North Mill Pond 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 June 2023.

How much traffic does Submarine Way over North Mill Pond carry?

About 10 vehicles per day (2009 count), of which roughly 5% are trucks.

How long is Submarine Way over North Mill Pond?

The structure is 52 ft (15.8 m) long with a longest span of 49 ft (14.9 m) and a deck 56 ft wide.

Who owns Submarine Way over North Mill Pond?

It is owned by the State Highway Agency.