US Bridges

Old Shaker Road over Shaker Brook

Good

Merrimack County, New Hampshire · 1.7 MI from RTE 106 · Structure no. 015501040013300

Built
1920
105 years old, rebuilt 1995
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
300
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

Old Shaker Road over Shaker Brook is a steel stringer/multi-beam or girder carrying Old Shaker Road over Shaker Brook in Merrimack County, New Hampshire. It was built in 1920 and reconstructed in 1995, so it is 105 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 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 300 vehicles a day, projected to reach 444 by 2043. The structure is 52 ft (15.8 m) long and 17 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

Location

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CarriesOld Shaker Road
CrossesShaker Brook
Location1.7 MI from RTE 106
CountyMerrimack County
StateNew Hampshire
Coordinates43.32766, -71.48822
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
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating99 US tons
Inventory rating60 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadUnknown
Structure length52 ft (15.8 m)
Longest span48 ft (14.6 m)
Deck width17 ft (5.2 m)
Roadway width14 ft (4.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic300 (2023)
Projected traffic444 by 2043
Trucks0%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Old Shaker Road over Shaker Brook built?

It was built in 1920, making it 105 years old in 2025. It was reconstructed in 1995.

What condition is Old Shaker Road over Shaker 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 September 2023.

How much traffic does Old Shaker Road over Shaker Brook carry?

About 300 vehicles per day (2023 count).

How long is Old Shaker Road over Shaker Brook?

The structure is 52 ft (15.8 m) long with a longest span of 48 ft (14.6 m) and a deck 17 ft wide.

Who owns Old Shaker Road over Shaker Brook?

It is owned by the City or Municipal Highway Agency.