US Bridges

River Road over Perry Stream

Fair

Coos County, New Hampshire · 0.5 MI from US RTE 3 · Structure no. 021001380005100

Built
1984
41 years old
Condition
Fair
inspected September 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
50 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

River Road over Perry Stream is a steel stringer/multi-beam or girder carrying River Road over Perry Stream in Coos County, New Hampshire. It was built in 1984, 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 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 50 ft (15.2 m) long and 16 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

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CarriesRiver Road
CrossesPerry Stream
Location0.5 MI from US RTE 3
CountyCoos County
StateNew Hampshire
Coordinates45.07239, -71.30574
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
Deck7 GoodSome minor problems.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 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 geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.1 US tons
Inventory rating24.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckWood or timber
Main spans1
Design loadUnknown
Structure length50 ft (15.2 m)
Longest span46 ft (14 m)
Deck width16 ft (5 m)
Roadway width10 ft (3.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks4%
Lanes on structure1
Traffic directionOne-lane bridge for two-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 River Road over Perry Stream built?

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

What condition is River Road over Perry Stream 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 September 2024.

How much traffic does River Road over Perry Stream carry?

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

How long is River Road over Perry Stream?

The structure is 50 ft (15.2 m) long with a longest span of 46 ft (14 m) and a deck 16 ft wide.

Who owns River Road over Perry Stream?

It is owned by the City or Municipal Highway Agency.