US Bridges

Daniel Webster HWY over Nashua River

Fair

Hillsborough County, New Hampshire · 0.02 MI from Pearson Ave · Structure no. 017701270011500

Built
1925
100 years old
Condition
Fair
inspected August 2023
Type
Arch - Deck
Concrete
Length
158 ft
2 main spans
Daily traffic
16,730
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Daniel Webster HWY over Nashua River is a concrete arch - deck carrying Daniel Webster HWY over Nashua River in Hillsborough County, New Hampshire. It was built in 1925, so it is 100 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 16,730 vehicles a day, roughly 5% of them trucks, projected to reach 24,760 by 2043. The structure is 158 ft (48.2 m) long and 108 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesDaniel Webster HWY
CrossesNashua River
Location0.02 MI from Pearson Ave
RouteState Highway 0
CountyHillsborough County
StateNew Hampshire
Coordinates42.7635, -71.46656
Functional classUrban Other Principal 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.
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 inspectionAugust 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating29.2 US tons
Inventory rating21.2 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length158 ft (48.2 m)
Longest span57 ft (17.4 m)
Deck width108 ft (32.9 m)
Roadway width76 ft (23.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic16,730 (2023)
Projected traffic24,760 by 2043
Trucks5%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed1.9 mi (3 km)
TollOn a free road
National Highway SystemYes

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 Daniel Webster HWY over Nashua River built?

It was built in 1925, making it 100 years old in 2025.

What condition is Daniel Webster HWY over Nashua 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 August 2023.

How much traffic does Daniel Webster HWY over Nashua River carry?

About 16,730 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Daniel Webster HWY over Nashua River?

The structure is 158 ft (48.2 m) long with a longest span of 57 ft (17.4 m) and a deck 108 ft wide.

Who owns Daniel Webster HWY over Nashua River?

It is owned by the City or Municipal Highway Agency.