US Bridges

Mo 79 S over Bobs CR

Good

Lincoln County, Missouri · S 36 T 49 N R 2 E · Structure no. 3239

Built
1978
47 years old
Condition
Good
inspected September 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
178 ft
3 main spans
Daily traffic
10,090
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 79 S over Bobs CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 79 S over Bobs CR in Lincoln County, Missouri. It was built in 1978, so it is 47 years old, older 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 10,090 vehicles a day, roughly 12% of them trucks, projected to reach 20,180 by 2044. The structure is 178 ft (54.3 m) long and 47 ft wide. If it were closed, the detour would be 31.7 mi (51 km).

CarriesMo 79 S
CrossesBobs CR
LocationS 36 T 49 N R 2 E
RouteState Highway 79
Coordinates38.96541, -90.7423
Functional classRural Minor Arterial

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.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating87.3 US tons
Inventory rating36.7 US tons

Structure

MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20
Structure length178 ft (54.3 m)
Longest span60 ft (18.2 m)
Deck width47 ft (14.4 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic10,090 (2024)
Projected traffic20,180 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.7 mi (51 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—
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 79 S over Bobs CR built?

It was built in 1978, making it 47 years old in 2025.

What condition is Mo 79 S over Bobs CR 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 September 2024.

How much traffic does Mo 79 S over Bobs CR carry?

About 10,090 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 79 S over Bobs CR?

The structure is 178 ft (54.3 m) long with a longest span of 60 ft (18.2 m) and a deck 47 ft wide.

Who owns Mo 79 S over Bobs CR?

It is owned by the State Highway Agency.