US Bridges

Nh 11 over Nhrr(abd)

Poor

Merrimack County, New Hampshire · 0.6 MI from Franklin Tl · Structure no. 000802060013700

Built
1929
96 years old
Condition
Poor
inspected November 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
179 ft
5 main spans
Daily traffic
2,674
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 11 over Nhrr(abd) is a steel stringer/multi-beam or girder carrying Nh 11 over Nhrr(abd) in Merrimack County, New Hampshire. It was built in 1929, so it is 96 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 poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 2,674 vehicles a day, roughly 7% of them trucks, projected to reach 3,957 by 2043. The structure is 179 ft (54.6 m) long and 30 ft wide. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNh 11
CrossesNhrr(abd)
Location0.6 MI from Franklin Tl
RouteState Highway 11
CountyMerrimack County
StateNew Hampshire
Coordinates43.46828, -71.71701
Functional classRural Minor Arterial

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 8 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating25.2 US tons
Inventory rating18 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans5
Design loadH 15
Structure length179 ft (54.6 m)
Longest span52 ft (16 m)
Deck width30 ft (9 m)
Roadway width27 ft (8.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic2,674 (2023)
Projected traffic3,957 by 2043
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesPedestrian / bicycle
Detour if closed3.1 mi (5 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 11 over Nhrr(abd) built?

It was built in 1929, making it 96 years old in 2025.

What condition is Nh 11 over Nhrr(abd) in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in November 2024.

How much traffic does Nh 11 over Nhrr(abd) carry?

About 2,674 vehicles per day (2023 count), of which roughly 7% are trucks.

How long is Nh 11 over Nhrr(abd)?

The structure is 179 ft (54.6 m) long with a longest span of 52 ft (16 m) and a deck 30 ft wide.

Who owns Nh 11 over Nhrr(abd)?

It is owned by the State Highway Agency.