US Bridges

Mo 3 S over BNSF RR

Fair

Macon County, Missouri · S 20 T 60 N R 15 W · Structure no. 1655

Built
1967
58 years old
Condition
Fair
inspected September 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
255 ft
3 main spans
Daily traffic
326
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 3 S over BNSF RR is a steel continuous stringer/multi-beam or girder carrying Mo 3 S over BNSF RR in Macon County, Missouri. It was built in 1967, so it is 58 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 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 326 vehicles a day, roughly 11% of them trucks, projected to reach 408 by 2044. The structure is 255 ft (77.7 m) long and 29 ft wide. If it were closed, the detour would be 29.2 mi (47 km).

Location

Open in Google Maps
CarriesMo 3 S
CrossesBNSF RR
LocationS 20 T 60 N R 15 W
RouteState Highway 3
CountyMacon County
StateMissouri
Coordinates40.00012, -92.59515
Functional classRural Major Collector

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourBridge not over waterway
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating18.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length255 ft (77.7 m)
Longest span100 ft (30.5 m)
Deck width29 ft (8.8 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic326 (2024)
Projected traffic408 by 2044
Trucks11%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesRailroad
Detour if closed29.2 mi (47 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 proposedNone recorded
Estimated improvement cost—
NavigationNot applicable (no waterway)

Frequently asked questions

When was Mo 3 S over BNSF RR built?

It was built in 1967, making it 58 years old in 2025.

What condition is Mo 3 S over BNSF RR 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 September 2023.

How much traffic does Mo 3 S over BNSF RR carry?

About 326 vehicles per day (2024 count), of which roughly 11% are trucks.

How long is Mo 3 S over BNSF RR?

The structure is 255 ft (77.7 m) long with a longest span of 100 ft (30.5 m) and a deck 29 ft wide.

Who owns Mo 3 S over BNSF RR?

It is owned by the State Highway Agency.