US Bridges

Hillsboro House SP over Trib to Belew CR

Good

Jefferson County, Missouri · S 10 T 41 N R 4 E · Structure no. 36483

Built
2020
5 years old
Condition
Good
inspected February 2025
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
54 ft
1 main span
Daily traffic
400
2023 count
Owner
County
County Highway Agency

About this bridge

Hillsboro House SP over Trib to Belew CR is a prestressed concrete stringer/multi-beam or girder carrying Hillsboro House SP over Trib to Belew CR in Jefferson County, Missouri. It was built in 2020, so it is 5 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 400 vehicles a day, roughly 5% of them trucks, projected to reach 800 by 2043. The structure is 54 ft (16.5 m) long and 33 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

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CarriesHillsboro House SP
CrossesTrib to Belew CR
LocationS 10 T 41 N R 4 E
RouteCounty Highway 139
CountyJefferson County
StateMissouri
Coordinates38.30611, -90.56833
Functional classRural Minor Collector

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionFebruary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating77.4 US tons
Inventory rating42.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length54 ft (16.5 m)
Longest span50 ft (15.2 m)
Deck width33 ft (10 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic400 (2023)
Projected traffic800 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 Hillsboro House SP over Trib to Belew CR built?

It was built in 2020, making it 5 years old in 2025.

What condition is Hillsboro House SP over Trib to Belew CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in February 2025.

How much traffic does Hillsboro House SP over Trib to Belew CR carry?

About 400 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Hillsboro House SP over Trib to Belew CR?

The structure is 54 ft (16.5 m) long with a longest span of 50 ft (15.2 m) and a deck 33 ft wide.

Who owns Hillsboro House SP over Trib to Belew CR?

It is owned by the County Highway Agency.