US Bridges

E Walnut ST over Hinkson CR

Fair

Boone County, Missouri · S 8 T 48 N R 12 W · Structure no. 15409

Built
1981
44 years old
Condition
Fair
inspected December 2024
Type
Tee Beam
Prestressed Concrete Continuous
Length
93 ft
2 main spans
Daily traffic
220
2023 count
Owner
City
City or Municipal Highway Agency

About this bridge

E Walnut ST over Hinkson CR is a prestressed concrete continuous tee beam carrying E Walnut ST over Hinkson CR in Boone County, Missouri. It was built in 1981, so it is 44 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 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 220 vehicles a day, roughly 1% of them trucks, projected to reach 385 by 2043. The structure is 93 ft (28.3 m) long and 27 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesE Walnut ST
CrossesHinkson CR
LocationS 8 T 48 N R 12 W
RouteCity Street 0
CountyBoone County
StateMissouri
Coordinates38.95307, -92.30064
Functional classUrban 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
Deck5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
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 inspectionDecember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment7: Better than present minimum criteria
Operating rating59.5 US tons
Inventory rating32.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadHS 20
Structure length93 ft (28.3 m)
Longest span45 ft (13.7 m)
Deck width27 ft (8.3 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic220 (2023)
Projected traffic385 by 2043
Trucks1%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 E Walnut ST over Hinkson CR built?

It was built in 1981, making it 44 years old in 2025.

What condition is E Walnut ST over Hinkson 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 December 2024.

How much traffic does E Walnut ST over Hinkson CR carry?

About 220 vehicles per day (2023 count), of which roughly 1% are trucks.

How long is E Walnut ST over Hinkson CR?

The structure is 93 ft (28.3 m) long with a longest span of 45 ft (13.7 m) and a deck 27 ft wide.

Who owns E Walnut ST over Hinkson CR?

It is owned by the City or Municipal Highway Agency.