US Bridges

Nh 28 Bypass over Lake Massabesic

Good

Rockingham County, New Hampshire · 2.0 MI JCT Rt 121 · Structure no. 001300700010200

Built
2001
24 years old
Condition
Good
inspected March 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
48 ft
1 main span
Daily traffic
7,177
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 28 Bypass over Lake Massabesic is a prestressed concrete box beam or girders - multiple carrying Nh 28 Bypass over Lake Massabesic in Rockingham County, New Hampshire. It was built in 2001, so it is 24 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 7,177 vehicles a day, roughly 5% of them trucks, projected to reach 10,621 by 2043. The structure is 48 ft (14.6 m) long and 34 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesNh 28 Bypass
CrossesLake Massabesic
Location2.0 MI JCT Rt 121
RouteState Highway 28
CountyRockingham County
StateNew Hampshire
Coordinates42.988, -71.37566
Functional classRural 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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating81.4 US tons
Inventory rating48.8 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 25 or greater
Structure length48 ft (14.6 m)
Longest span43 ft (13.1 m)
Deck width34 ft (10.4 m)
Roadway width31 ft (9.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,177 (2023)
Projected traffic10,621 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Nh 28 Bypass over Lake Massabesic built?

It was built in 2001, making it 24 years old in 2025.

What condition is Nh 28 Bypass over Lake Massabesic 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 March 2023.

How much traffic does Nh 28 Bypass over Lake Massabesic carry?

About 7,177 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nh 28 Bypass over Lake Massabesic?

The structure is 48 ft (14.6 m) long with a longest span of 43 ft (13.1 m) and a deck 34 ft wide.

Who owns Nh 28 Bypass over Lake Massabesic?

It is owned by the State Highway Agency.