US Bridges

Nh 13 over S Br Piscataquog River

Fair

Hillsborough County, New Hampshire · .1 MI from JCT Rt 136 · Structure no. 017900960009400

Built
1937
88 years old, rebuilt 1975
Condition
Fair
inspected May 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
63 ft
1 main span
Daily traffic
3,777
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 13 over S Br Piscataquog River is a steel stringer/multi-beam or girder carrying Nh 13 over S Br Piscataquog River in Hillsborough County, New Hampshire. It was built in 1937 and reconstructed in 1975, so it is 88 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 3,777 vehicles a day, roughly 4% of them trucks, projected to reach 5,589 by 2043. The structure is 63 ft (19.2 m) long and 36 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesNh 13
CrossesS Br Piscataquog River
Location.1 MI from JCT Rt 136
RouteState Highway 13
CountyHillsborough County
StateNew Hampshire
Coordinates42.96968, -71.69755
Functional classRural Major Collector

Condition and inspection

Fair

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

ComponentRatingMeaning
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure7 GoodSome minor problems.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection7 GoodSome minor problems.
Last inspectionMay 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 geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating37.8 US tons
Inventory rating27 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 15
Structure length63 ft (19.2 m)
Longest span58 ft (17.7 m)
Deck width36 ft (11 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,777 (2023)
Projected traffic5,589 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Nh 13 over S Br Piscataquog River built?

It was built in 1937, making it 88 years old in 2025. It was reconstructed in 1975.

What condition is Nh 13 over S Br Piscataquog River 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 May 2024.

How much traffic does Nh 13 over S Br Piscataquog River carry?

About 3,777 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nh 13 over S Br Piscataquog River?

The structure is 63 ft (19.2 m) long with a longest span of 58 ft (17.7 m) and a deck 36 ft wide.

Who owns Nh 13 over S Br Piscataquog River?

It is owned by the State Highway Agency.