US Bridges

Rt N N over UP RR

Good

Iron County, Missouri · S 12 T 34 N R 3 E · Structure no. 31890

Built
2007
18 years old
Condition
Good
inspected October 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
217 ft
3 main spans
Daily traffic
3,718
2024 count
Owner
State
State Highway Agency

About this bridge

Rt N N over UP RR is a prestressed concrete continuous stringer/multi-beam or girder carrying Rt N N over UP RR in Iron County, Missouri. It was built in 2007, so it is 18 years old, younger than the Missouri average of 45.1 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 3,718 vehicles a day, roughly 15% of them trucks, projected to reach 5,205 by 2044. The structure is 217 ft (66.1 m) long and 33 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

CarriesRt N N
CrossesUP RR
LocationS 12 T 34 N R 3 E
RouteState Highway 0N
Coordinates37.66716, -90.6503
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
Deck7 GoodSome minor problems.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation8: Equal to present desirable criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment7: Better than present minimum criteria
Operating rating77.4 US tons
Inventory rating46.6 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHL 93
Structure length217 ft (66.1 m)
Longest span81 ft (24.7 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,718 (2024)
Projected traffic5,205 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Rt N N over UP RR built?

It was built in 2007, making it 18 years old in 2025.

What condition is Rt N N over UP RR 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 October 2023.

How much traffic does Rt N N over UP RR carry?

About 3,718 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Rt N N over UP RR?

The structure is 217 ft (66.1 m) long with a longest span of 81 ft (24.7 m) and a deck 33 ft wide.

Who owns Rt N N over UP RR?

It is owned by the State Highway Agency.