US Bridges

County RD 158 over Grassy CR

Good

Marion County, Missouri · S 3 T 59 N R 7 W · Structure no. 13542

Built
1987
38 years old
Condition
Good
inspected February 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
70 ft
1 main span
Daily traffic
50
2023 count
Owner
County
County Highway Agency

About this bridge

County RD 158 over Grassy CR is a prestressed concrete box beam or girders - multiple carrying County RD 158 over Grassy CR in Marion County, Missouri. It was built in 1987, so it is 38 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 50 vehicles a day, roughly 10% of them trucks, projected to reach 63 by 2043. The structure is 70 ft (21.3 m) long and 21 ft wide. If it were closed, the detour would be 8.1 mi (13 km).

Location

Open in Google Maps
CarriesCounty RD 158
CrossesGrassy CR
LocationS 3 T 59 N R 7 W
RouteCounty Highway 41
CountyMarion County
StateMissouri
Coordinates39.93742, -91.66028
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating64.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckConcrete, precast panels
Main spans1
Design loadHS 20
Structure length70 ft (21.3 m)
Longest span67 ft (20.4 m)
Deck width21 ft (6.5 m)
Roadway width21 ft (6.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2023)
Projected traffic63 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.1 mi (13 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 County RD 158 over Grassy CR built?

It was built in 1987, making it 38 years old in 2025.

What condition is County RD 158 over Grassy 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 February 2023.

How much traffic does County RD 158 over Grassy CR carry?

About 50 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is County RD 158 over Grassy CR?

The structure is 70 ft (21.3 m) long with a longest span of 67 ft (20.4 m) and a deck 21 ft wide.

Who owns County RD 158 over Grassy CR?

It is owned by the County Highway Agency.