US Bridges

Mo 79 S over Grassy CR

Fair

Pike County, Missouri · S 10 T 54 N R 2 W · Structure no. 3296

Built
1981
44 years old
Condition
Fair
inspected December 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
242 ft
6 main spans
Daily traffic
802
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 79 S over Grassy CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Mo 79 S over Grassy CR in Pike County, Missouri. It was built in 1981, so it is 44 years old, younger 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 802 vehicles a day, roughly 7% of them trucks, projected to reach 1,243 by 2044. The structure is 242 ft (73.8 m) long and 41 ft wide. If it were closed, the detour would be 37.9 mi (61 km).

Location

Open in Google Maps
CarriesMo 79 S
CrossesGrassy CR
LocationS 10 T 54 N R 2 W
RouteState Highway 79
CountyPike County
StateMissouri
Coordinates39.4709, -91.10206
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
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry7: Better than present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating72.4 US tons
Inventory rating28.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans6
Design loadH 20
Structure length242 ft (73.8 m)
Longest span49 ft (14.9 m)
Deck width41 ft (12.4 m)
Roadway width38 ft (11.6 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic802 (2024)
Projected traffic1,243 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed37.9 mi (61 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 Grassy CR built?

It was built in 1981, making it 44 years old in 2025.

What condition is Mo 79 S over Grassy 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 December 2024.

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

About 802 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Mo 79 S over Grassy CR?

The structure is 242 ft (73.8 m) long with a longest span of 49 ft (14.9 m) and a deck 41 ft wide.

Who owns Mo 79 S over Grassy CR?

It is owned by the State Highway Agency.