US Bridges

Hilsboro House Spr over Bourne Crk

Good

Jefferson County, Missouri · S 22 T 42 N R 4 E · Structure no. 36810

Built
2022
3 years old
Condition
Good
inspected February 2025
Type
Arch - Deck
Concrete
Length
56 ft
1 main span
Daily traffic
1,503
2023 count
Owner
County
County Highway Agency

About this bridge

Hilsboro House Spr over Bourne Crk is a concrete arch - deck carrying Hilsboro House Spr over Bourne Crk in Jefferson County, Missouri. It was built in 2022, so it is 3 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 1,503 vehicles a day, roughly 5% of them trucks, projected to reach 3,006 by 2043. The structure is 56 ft (17.2 m) long and 96 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesHilsboro House Spr
CrossesBourne Crk
LocationS 22 T 42 N R 4 E
RouteCounty Highway 115
CountyJefferson County
StateMissouri
Coordinates38.36526, -90.5613
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
Superstructure7 GoodSome minor problems.
Substructure8 Very GoodNo problems noted.
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 evaluation7: Better than 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 rating98.2 US tons
Inventory rating71.4 US tons

Structure

Structure typeArch - Deck
MaterialConcrete
DeckNot applicable
Main spans1
Design loadHS 20
Structure length56 ft (17.2 m)
Longest span56 ft (17.2 m)
Deck width96 ft (29.3 m)
Roadway width30 ft (9.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,503 (2023)
Projected traffic3,006 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-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 statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Hilsboro House Spr over Bourne Crk built?

It was built in 2022, making it 3 years old in 2025.

What condition is Hilsboro House Spr over Bourne Crk 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 Hilsboro House Spr over Bourne Crk carry?

About 1,503 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is Hilsboro House Spr over Bourne Crk?

The structure is 56 ft (17.2 m) long with a longest span of 56 ft (17.2 m) and a deck 96 ft wide.

Who owns Hilsboro House Spr over Bourne Crk?

It is owned by the County Highway Agency.