US Bridges

Nh 11 over Sucker Brook

Poor

Merrimack County, New Hampshire · .3 MI from Franklin T.L. · Structure no. 000802120013800

Built
1929
96 years old
Condition
Poor
inspected November 2024
Type
Culvert
Concrete
Length
28 ft
1 main span
Daily traffic
2,674
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 11 over Sucker Brook is a concrete culvert carrying Nh 11 over Sucker Brook 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 28 ft (8.5 m) long. If it were closed, the detour would be 3.1 mi (5 km).

Location

Open in Google Maps
CarriesNh 11
CrossesSucker Brook
Location.3 MI from Franklin T.L.
RouteState Highway 11
CountyMerrimack County
StateNew Hampshire
Coordinates43.46728, -71.71146
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
Channel and channel protection7 GoodSome minor problems.
Culvert4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionNovember 2024
Inspection intervalevery 8 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating59.6 US tons
Inventory rating35.6 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans1
Design loadH 15
Structure length28 ft (8.5 m)
Longest span28 ft (8.5 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 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
CrossesWaterway
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)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nh 11 over Sucker Brook built?

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

What condition is Nh 11 over Sucker Brook 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 Sucker Brook carry?

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

How long is Nh 11 over Sucker Brook?

The structure is 28 ft (8.5 m) long with a longest span of 28 ft (8.5 m).

Who owns Nh 11 over Sucker Brook?

It is owned by the State Highway Agency.