US Bridges

Nh 12 over Maple Avenue

Fair

Cheshire County, New Hampshire · 2.5 MI Surry Tl · Structure no. 013600960010700

Built
1966
59 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
146 ft
3 main spans
Daily traffic
10,675
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 12 over Maple Avenue is a steel continuous stringer/multi-beam or girder carrying Nh 12 over Maple Avenue in Cheshire County, New Hampshire. It was built in 1966, so it is 59 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 fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 10,675 vehicles a day, roughly 5% of them trucks, projected to reach 15,799 by 2043. The structure is 146 ft (44.5 m) long and 50 ft wide.

Location

Open in Google Maps
CarriesNh 12
CrossesMaple Avenue
Location2.5 MI Surry Tl
RouteState Highway 12
CountyCheshire County
StateNew Hampshire
Coordinates42.95422, -72.31716
Functional classUrban Minor Arterial

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating89 US tons
Inventory rating53 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length146 ft (44.5 m)
Longest span71 ft (21.6 m)
Deck width50 ft (15.1 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,675 (2023)
Projected traffic15,799 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesHighway
Detour if closed—
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 12 over Maple Avenue built?

It was built in 1966, making it 59 years old in 2025.

What condition is Nh 12 over Maple Avenue in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in March 2023.

How much traffic does Nh 12 over Maple Avenue carry?

About 10,675 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Nh 12 over Maple Avenue?

The structure is 146 ft (44.5 m) long with a longest span of 71 ft (21.6 m) and a deck 50 ft wide.

Who owns Nh 12 over Maple Avenue?

It is owned by the State Highway Agency.