US Bridges

Magazine Street over Riddle Brook

Good

Hillsborough County, New Hampshire · 0.2 MI from Jcksn Sq · Structure no. 001901120014000

Built
2013
12 years old
Condition
Good
inspected July 2024
Type
Culvert
Concrete
Length
33 ft
2 main spans
Daily traffic
571
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Magazine Street over Riddle Brook is a concrete culvert carrying Magazine Street over Riddle Brook in Hillsborough County, New Hampshire. It was built in 2013, so it is 12 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 571 vehicles a day, projected to reach 845 by 2043. The structure is 33 ft (10.1 m) long. If it were closed, the detour would be 1.9 mi (3 km).

CarriesMagazine Street
CrossesRiddle Brook
Location0.2 MI from Jcksn Sq
Coordinates42.95722, -71.54331
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
Channel and channel protection8 Very GoodNo problems noted.
Culvert7 GoodSome minor problems.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating66.1 US tons
Inventory rating50.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans2
Design loadHL 93
Structure length33 ft (10.1 m)
Longest span15 ft (4.6 m)
Deck width0 ft (0 m)
Roadway width0 ft (0 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic571 (2023)
Projected traffic845 by 2043
Trucks0%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Magazine Street over Riddle Brook built?

It was built in 2013, making it 12 years old in 2025.

What condition is Magazine Street over Riddle 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 2024.

How much traffic does Magazine Street over Riddle Brook carry?

About 571 vehicles per day (2023 count).

How long is Magazine Street over Riddle Brook?

The structure is 33 ft (10.1 m) long with a longest span of 15 ft (4.6 m).

Who owns Magazine Street over Riddle Brook?

It is owned by the City or Municipal Highway Agency.