US Bridges

SW1000 over Marshall CR

Fair

Henry County, Missouri · S 26 T 40 N R 27 W · Structure no. 24347

Built
1993
32 years old
Condition
Fair
inspected March 2023
Type
Stringer/Multi-beam or Girder
Steel
Length
74 ft
1 main span
Daily traffic
40
2023 count
Owner
County
County Highway Agency

About this bridge

SW1000 over Marshall CR is a steel stringer/multi-beam or girder carrying SW1000 over Marshall CR in Henry County, Missouri. It was built in 1993, so it is 32 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 40 vehicles a day, roughly 10% of them trucks, projected to reach 56 by 2043. The structure is 74 ft (22.6 m) long and 18 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesSW1000
CrossesMarshall CR
LocationS 26 T 40 N R 27 W
RouteCounty Highway 481
CountyHenry County
StateMissouri
Coordinates38.224, -93.87608
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.
Superstructure7 GoodSome minor problems.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating36.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadOther
Structure length74 ft (22.6 m)
Longest span72 ft (21.9 m)
Deck width18 ft (5.6 m)
Roadway width18 ft (5.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic40 (2023)
Projected traffic56 by 2043
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$385,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was SW1000 over Marshall CR built?

It was built in 1993, making it 32 years old in 2025.

What condition is SW1000 over Marshall 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 March 2023.

How much traffic does SW1000 over Marshall CR carry?

About 40 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SW1000 over Marshall CR?

The structure is 74 ft (22.6 m) long with a longest span of 72 ft (21.9 m) and a deck 18 ft wide.

Who owns SW1000 over Marshall CR?

It is owned by the County Highway Agency.