US Bridges

SE400 over Pretty Bob CR

Fair

Henry County, Missouri · S 26 T 41 N R 25 W · Structure no. 22749

Built
1950
75 years old, rebuilt 1987
Condition
Fair
inspected February 2025
Type
Stringer/Multi-beam or Girder
Steel
Length
38 ft
1 main span
Daily traffic
55
2023 count
Owner
County
County Highway Agency

About this bridge

SE400 over Pretty Bob CR is a steel stringer/multi-beam or girder carrying SE400 over Pretty Bob CR in Henry County, Missouri. It was built in 1950 and reconstructed in 1987, so it is 75 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 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 55 vehicles a day, roughly 10% of them trucks, projected to reach 77 by 2043. The structure is 38 ft (11.6 m) long and 19 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesSE400
CrossesPretty Bob CR
LocationS 26 T 41 N R 25 W
RouteCounty Highway 372
CountyHenry County
StateMissouri
Coordinates38.30518, -93.64999
Functional classRural Minor 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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating42.7 US tons
Inventory rating15.9 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans1
Design loadH 10
Structure length38 ft (11.6 m)
Longest span36 ft (11 m)
Deck width19 ft (5.8 m)
Roadway width19 ft (5.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic55 (2023)
Projected traffic77 by 2043
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 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 SE400 over Pretty Bob CR built?

It was built in 1950, making it 75 years old in 2025. It was reconstructed in 1987.

What condition is SE400 over Pretty Bob 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 February 2025.

How much traffic does SE400 over Pretty Bob CR carry?

About 55 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is SE400 over Pretty Bob CR?

The structure is 38 ft (11.6 m) long with a longest span of 36 ft (11 m) and a deck 19 ft wide.

Who owns SE400 over Pretty Bob CR?

It is owned by the County Highway Agency.