US Bridges

SW Grindstone RD over Bays Branch

Fair

DeKalb County, Missouri · S 14 T 58 N R 33 W · Structure no. 31607

Built
2006
19 years old
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
52 ft
1 main span
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

SW Grindstone RD over Bays Branch is a steel stringer/multi-beam or girder carrying SW Grindstone RD over Bays Branch in DeKalb County, Missouri. It was built in 2006, so it is 19 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 29 by 2044. The structure is 52 ft (15.8 m) long and 20 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesSW Grindstone RD
CrossesBays Branch
LocationS 14 T 58 N R 33 W
RouteCounty Highway 345
CountyDeKalb County
StateMissouri
Coordinates39.8349, -94.57023
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure7 GoodSome minor problems.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating76.4 US tons
Inventory rating45.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length52 ft (15.8 m)
Longest span51 ft (15.5 m)
Deck width20 ft (6.2 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic29 by 2044
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 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 SW Grindstone RD over Bays Branch built?

It was built in 2006, making it 19 years old in 2025.

What condition is SW Grindstone RD over Bays Branch 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 January 2025.

How much traffic does SW Grindstone RD over Bays Branch carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is SW Grindstone RD over Bays Branch?

The structure is 52 ft (15.8 m) long with a longest span of 51 ft (15.5 m) and a deck 20 ft wide.

Who owns SW Grindstone RD over Bays Branch?

It is owned by the County Highway Agency.