US Bridges

Broad ST Parkway over Nashua River

Good

Hillsborough County, New Hampshire · 0.4 MI N. of W. Hollis ST · Structure no. 017701190011500

Built
2016
9 years old
Condition
Good
inspected August 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
411 ft
3 main spans
Daily traffic
1,100
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Broad ST Parkway over Nashua River is a steel continuous stringer/multi-beam or girder carrying Broad ST Parkway over Nashua River in Hillsborough County, New Hampshire. It was built in 2016, so it is 9 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 good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,100 vehicles a day, projected to reach 1,628 by 2043. The structure is 411 ft (125.3 m) long and 58 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesBroad ST Parkway
CrossesNashua River
Location0.4 MI N. of W. Hollis ST
RouteCity Street 0
CountyHillsborough County
StateNew Hampshire
Coordinates42.76224, -71.47328
Functional classUrban Minor Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry8: Equal to present desirable criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating68.3 US tons
Inventory rating52.5 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length411 ft (125.3 m)
Longest span156 ft (47.5 m)
Deck width58 ft (17.7 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,100 (2023)
Projected traffic1,628 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Broad ST Parkway over Nashua River built?

It was built in 2016, making it 9 years old in 2025.

What condition is Broad ST Parkway over Nashua River in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in August 2023.

How much traffic does Broad ST Parkway over Nashua River carry?

About 1,100 vehicles per day (2023 count).

How long is Broad ST Parkway over Nashua River?

The structure is 411 ft (125.3 m) long with a longest span of 156 ft (47.5 m) and a deck 58 ft wide.

Who owns Broad ST Parkway over Nashua River?

It is owned by the City or Municipal Highway Agency.