US Bridges

Manchester Street over Pennichuck Reservoir

Good

Hillsborough County, New Hampshire · At Nashua Tl · Structure no. 016801200002600

Built
2015
10 years old
Condition
Good
inspected September 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete Continuous
Length
127 ft
3 main spans
Daily traffic
2,930
2022 count
Owner
City
City or Municipal Highway Agency

About this bridge

Manchester Street over Pennichuck Reservoir is a prestressed concrete continuous box beam or girders - multiple carrying Manchester Street over Pennichuck Reservoir in Hillsborough County, New Hampshire. It was built in 2015, so it is 10 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 2,930 vehicles a day, roughly 4% of them trucks, projected to reach 4,336 by 2042. The structure is 127 ft (38.7 m) long and 36 ft wide. If it were closed, the detour would be 5 mi (8 km).

CarriesManchester Street
CrossesPennichuck Reservoir
LocationAt Nashua Tl
RouteCity Street 0
Coordinates42.79376, -71.48486
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating57.5 US tons
Inventory rating47.5 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length127 ft (38.7 m)
Longest span60 ft (18.3 m)
Deck width36 ft (11 m)
Roadway width28 ft (8.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,930 (2022)
Projected traffic4,336 by 2042
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 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 Manchester Street over Pennichuck Reservoir built?

It was built in 2015, making it 10 years old in 2025.

What condition is Manchester Street over Pennichuck Reservoir 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 September 2023.

How much traffic does Manchester Street over Pennichuck Reservoir carry?

About 2,930 vehicles per day (2022 count), of which roughly 4% are trucks.

How long is Manchester Street over Pennichuck Reservoir?

The structure is 127 ft (38.7 m) long with a longest span of 60 ft (18.3 m) and a deck 36 ft wide.

Who owns Manchester Street over Pennichuck Reservoir?

It is owned by the City or Municipal Highway Agency.