US Bridges

Old HWY 21 S over Sandy CR

Fair

Jefferson County, Missouri · S 13 T 41 N R 4 E · Structure no. 32913

Built
1940
85 years old, rebuilt 2009
Condition
Fair
inspected January 2025
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
158 ft
3 main spans
Daily traffic
3,266
2023 count
Owner
County
County Highway Agency

About this bridge

Old HWY 21 S over Sandy CR is a steel continuous stringer/multi-beam or girder carrying Old HWY 21 S over Sandy CR in Jefferson County, Missouri. It was built in 1940 and reconstructed in 2009, so it is 85 years old, older 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 5 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 3,266 vehicles a day, roughly 10% of them trucks, projected to reach 6,532 by 2043. The structure is 158 ft (48.2 m) long and 29 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesOld HWY 21 S
CrossesSandy CR
LocationS 13 T 41 N R 4 E
RouteCounty Highway 0
CountyJefferson County
StateMissouri
Coordinates38.29475, -90.52897
Functional classRural Major Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 12 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating78.4 US tons
Inventory rating46.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 15
Structure length158 ft (48.2 m)
Longest span52 ft (16 m)
Deck width29 ft (8.8 m)
Roadway width29 ft (8.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic3,266 (2023)
Projected traffic6,532 by 2043
Trucks10%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 Old HWY 21 S over Sandy CR built?

It was built in 1940, making it 85 years old in 2025. It was reconstructed in 2009.

What condition is Old HWY 21 S over Sandy 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 January 2025.

How much traffic does Old HWY 21 S over Sandy CR carry?

About 3,266 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Old HWY 21 S over Sandy CR?

The structure is 158 ft (48.2 m) long with a longest span of 52 ft (16 m) and a deck 29 ft wide.

Who owns Old HWY 21 S over Sandy CR?

It is owned by the County Highway Agency.