US Bridges

Nh 13 NH114 over Piscataquog River

Fair

Hillsborough County, New Hampshire · .3 MI S JCT Rt 13 · Structure no. 009500850010700

Built
1928
97 years old
Condition
Fair
inspected July 2023
Type
Arch - Deck
Concrete
Length
94 ft
1 main span
Daily traffic
13,570
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Nh 13 NH114 over Piscataquog River is a concrete arch - deck carrying Nh 13 NH114 over Piscataquog River in Hillsborough County, New Hampshire. It was built in 1928, so it is 97 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 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 13,570 vehicles a day, roughly 5% of them trucks, projected to reach 20,083 by 2043. The structure is 94 ft (28.7 m) long and 41 ft wide. If it were closed, the detour would be 13 mi (21 km).

Location

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CarriesNh 13 NH114
CrossesPiscataquog River
Location.3 MI S JCT Rt 13
RouteState Highway 114
CountyHillsborough County
StateNew Hampshire
Coordinates43.018, -71.59945
Functional classRural Minor Arterial

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.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating75.7 US tons
Inventory rating45.4 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length94 ft (28.7 m)
Longest span90 ft (27.4 m)
Deck width41 ft (12.5 m)
Roadway width28 ft (8.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic13,570 (2023)
Projected traffic20,083 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed13 mi (21 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal Highway Agency
Historic statusEligible 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 Nh 13 NH114 over Piscataquog River built?

It was built in 1928, making it 97 years old in 2025.

What condition is Nh 13 NH114 over 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 July 2023.

How much traffic does Nh 13 NH114 over Piscataquog River carry?

About 13,570 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nh 13 NH114 over Piscataquog River?

The structure is 94 ft (28.7 m) long with a longest span of 90 ft (27.4 m) and a deck 41 ft wide.

Who owns Nh 13 NH114 over Piscataquog River?

It is owned by the City or Municipal Highway Agency.