US Bridges

Hilldale Lane over S Br Piscataquog River

Fair

Hillsborough County, New Hampshire · 0.07 MI FR River RD · Structure no. 017901110011100

Built
1920
105 years old, rebuilt 2015
Condition
Fair
inspected July 2023
Type
Box Beam or Girders - Multiple
Concrete
Length
52 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Hilldale Lane over S Br Piscataquog River is a concrete box beam or girders - multiple carrying Hilldale Lane over S Br Piscataquog River in Hillsborough County, New Hampshire. It was built in 1920 and reconstructed in 2015, so it is 105 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 96 vehicles a day, projected to reach 142 by 2043. The structure is 52 ft (15.8 m) long and 15 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

Location

Open in Google Maps
CarriesHilldale Lane
CrossesS Br Piscataquog River
Location0.07 MI FR River RD
CountyHillsborough County
StateNew Hampshire
Coordinates42.98229, -71.68235
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
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 inspectionJuly 2023
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
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating63.7 US tons
Inventory rating49.1 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialConcrete
DeckConcrete, precast panels
Main spans1
Design loadHL 93
Structure length52 ft (15.8 m)
Longest span52 ft (15.8 m)
Deck width15 ft (4.6 m)
Roadway width14 ft (4.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks0%
Lanes on structure2
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 Hilldale Lane over S Br Piscataquog River built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 2015.

What condition is Hilldale Lane 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 July 2023.

How much traffic does Hilldale Lane over S Br Piscataquog River carry?

About 96 vehicles per day (2023 count).

How long is Hilldale Lane over S Br Piscataquog River?

The structure is 52 ft (15.8 m) long with a longest span of 52 ft (15.8 m) and a deck 15 ft wide.

Who owns Hilldale Lane over S Br Piscataquog River?

It is owned by the City or Municipal Highway Agency.