US Bridges

Mo 49 S over UP RR Big CR

Fair

Iron County, Missouri · S 35 T 32 N R 3 E · Structure no. 4495

Built
1945
80 years old
Condition
Fair
inspected October 2023
Type
Arch - Deck
Concrete Continuous
Length
496 ft
2 main spans
Daily traffic
1,237
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 49 S over UP RR Big CR is a concrete continuous arch - deck carrying Mo 49 S over UP RR Big CR in Iron County, Missouri. It was built in 1945, so it is 80 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 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 1,237 vehicles a day, roughly 15% of them trucks, projected to reach 1,856 by 2044. The structure is 496 ft (151.2 m) long and 30 ft wide. If it were closed, the detour would be 52.2 mi (84 km).

Location

Open in Google Maps
CarriesMo 49 S
CrossesUP RR Big CR
LocationS 35 T 32 N R 3 E
RouteState Highway 49
CountyIron County
StateMissouri
Coordinates37.41599, -90.69456
Functional classRural 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionOctober 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation2: Basically intolerable, requiring high priority of replacement
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating26.8 US tons
Inventory rating10.9 US tons

Structure

Structure typeArch - Deck
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2 (+6 approach)
Design loadH 15
Structure length496 ft (151.2 m)
Longest span105 ft (32 m)
Deck width30 ft (9.1 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,237 (2024)
Projected traffic1,856 by 2044
Trucks15%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad and waterway
Detour if closed52.2 mi (84 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$4.5 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 49 S over UP RR Big CR built?

It was built in 1945, making it 80 years old in 2025.

What condition is Mo 49 S over UP RR Big CR 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 October 2023.

How much traffic does Mo 49 S over UP RR Big CR carry?

About 1,237 vehicles per day (2024 count), of which roughly 15% are trucks.

How long is Mo 49 S over UP RR Big CR?

The structure is 496 ft (151.2 m) long with a longest span of 105 ft (32 m) and a deck 30 ft wide.

Who owns Mo 49 S over UP RR Big CR?

It is owned by the State Highway Agency.