US Bridges

Brookside Drive over Lion Brook

Good

Merrimack County, New Hampshire · 600FT Upstream of 132/064 · Structure no. 018801320006700

Built
2020
5 years old
Condition
Good
inspected July 2023
Type
Culvert
Aluminum, Wrought Iron, or Cast Iron
Length
28 ft
1 main span
Daily traffic
96
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Brookside Drive over Lion Brook is a aluminum, wrought iron, or cast iron culvert carrying Brookside Drive over Lion Brook in Merrimack County, New Hampshire. It was built in 2020, so it is 5 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 96 vehicles a day, projected to reach 142 by 2043. The structure is 28 ft (8.5 m) long.

Location

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CarriesBrookside Drive
CrossesLion Brook
Location600FT Upstream of 132/064
CountyMerrimack County
StateNew Hampshire
Coordinates43.39742, -71.97388
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection8 Very GoodNo problems noted.
Culvert9 ExcellentNo problems noted.
Last inspectionJuly 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.1 US tons
Inventory rating51.8 US tons

Structure

Structure typeCulvert
MaterialAluminum, Wrought Iron, or Cast Iron
DeckNot applicable
Main spans1
Design loadHL 93
Structure length28 ft (8.5 m)
Longest span19 ft (5.8 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic96 (2023)
Projected traffic142 by 2043
Trucks—
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed—
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 Brookside Drive over Lion Brook built?

It was built in 2020, making it 5 years old in 2025.

What condition is Brookside Drive over Lion Brook 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 July 2023.

How much traffic does Brookside Drive over Lion Brook carry?

About 96 vehicles per day (2023 count).

How long is Brookside Drive over Lion Brook?

The structure is 28 ft (8.5 m) long with a longest span of 19 ft (5.8 m).

Who owns Brookside Drive over Lion Brook?

It is owned by the City or Municipal Highway Agency.