US Bridges

Roberts DR over Br of Petite Salin

Fair

Cooper County, Missouri · S 33 T 46 N R 16 W · Structure no. 31548

Built
2005
20 years old
Condition
Fair
inspected December 2023
Type
Slab
Concrete
Length
21 ft
2 main spans
Daily traffic
5
2024 count
Owner
County
County Highway Agency

About this bridge

Roberts DR over Br of Petite Salin is a concrete slab carrying Roberts DR over Br of Petite Salin in Cooper County, Missouri. It was built in 2005, so it is 20 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 5 vehicles a day, roughly 10% of them trucks, projected to reach 7 by 2044. The structure is 21 ft (6.4 m) long and 28 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesRoberts DR
CrossesBr of Petite Salin
LocationS 33 T 46 N R 16 W
RouteCounty Highway 171
CountyCooper County
StateMissouri
Coordinates38.78781, -92.89733
Functional classRural Local

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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation6: Equal to present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment3: Basically intolerable, requiring high priority of corrective action
Operating rating110.1 US tons
Inventory rating71.4 US tons

Structure

Structure typeSlab
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadUnknown
Structure length21 ft (6.4 m)
Longest span10 ft (3.1 m)
Deck width28 ft (8.4 m)
Roadway width25 ft (7.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5 (2024)
Projected traffic7 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Roberts DR over Br of Petite Salin built?

It was built in 2005, making it 20 years old in 2025.

What condition is Roberts DR over Br of Petite Salin 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 2023.

How much traffic does Roberts DR over Br of Petite Salin carry?

About 5 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is Roberts DR over Br of Petite Salin?

The structure is 21 ft (6.4 m) long with a longest span of 10 ft (3.1 m) and a deck 28 ft wide.

Who owns Roberts DR over Br of Petite Salin?

It is owned by the County Highway Agency.