US Bridges

Nh 12A over Necrr

Good

Sullivan County, New Hampshire · 0.4 MI East Route 12 · Structure no. 004200760009100

Built
2000
25 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
109 ft
1 main span
Daily traffic
1,429
2023 count
Owner
State
State Highway Agency

About this bridge

Nh 12A over Necrr is a steel stringer/multi-beam or girder carrying Nh 12A over Necrr in Sullivan County, New Hampshire. It was built in 2000, so it is 25 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 1,429 vehicles a day, roughly 4% of them trucks, projected to reach 2,114 by 2043. The structure is 109 ft (33.2 m) long and 33 ft wide. If it were closed, the detour would be 1.2 mi (2 km).

CarriesNh 12A
CrossesNecrr
Location0.4 MI East Route 12
RouteState Highway 12A
Coordinates43.30139, -72.38788
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating74.7 US tons
Inventory rating45 US tons

Structure

MaterialSteel
DeckConcrete, precast panels
Main spans1
Design loadHS 25 or greater
Structure length109 ft (33.2 m)
Longest span105 ft (32 m)
Deck width33 ft (10.1 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,429 (2023)
Projected traffic2,114 by 2043
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed1.2 mi (2 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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)
NavigationNot applicable (no waterway)

Frequently asked questions

When was Nh 12A over Necrr built?

It was built in 2000, making it 25 years old in 2025.

What condition is Nh 12A over Necrr 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 April 2024.

How much traffic does Nh 12A over Necrr carry?

About 1,429 vehicles per day (2023 count), of which roughly 4% are trucks.

How long is Nh 12A over Necrr?

The structure is 109 ft (33.2 m) long with a longest span of 105 ft (32 m) and a deck 33 ft wide.

Who owns Nh 12A over Necrr?

It is owned by the State Highway Agency.