US Bridges

Harness RD over Hocum Hollow CR

Fair

Jefferson County, Missouri · S 4 T 39 N R 6 E · Structure no. 22108

Built
1900
125 years old
Condition
Fair
inspected January 2025
Type
Culvert
Concrete Continuous
Length
27 ft
2 main spans
Daily traffic
400
2023 count
Owner
County
County Highway Agency

About this bridge

Harness RD over Hocum Hollow CR is a concrete continuous culvert carrying Harness RD over Hocum Hollow CR in Jefferson County, Missouri. It was built in 1900, so it is 125 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 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 400 vehicles a day, roughly 5% of them trucks, projected to reach 800 by 2043. The structure is 27 ft (8.2 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesHarness RD
CrossesHocum Hollow CR
LocationS 4 T 39 N R 6 E
RouteCounty Highway 340
CountyJefferson County
StateMissouri
Coordinates38.12528, -90.36986
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
Channel and channel protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour within limits of footing or piles
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating54.6 US tons
Inventory rating24.8 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length27 ft (8.2 m)
Longest span12 ft (3.7 m)
Deck width24 ft (7.3 m)
Roadway width22 ft (6.8 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 closed3.7 mi (6 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 Harness RD over Hocum Hollow CR built?

It was built in 1900, making it 125 years old in 2025.

What condition is Harness RD over Hocum Hollow 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 January 2025.

How much traffic does Harness RD over Hocum Hollow CR carry?

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

How long is Harness RD over Hocum Hollow CR?

The structure is 27 ft (8.2 m) long with a longest span of 12 ft (3.7 m) and a deck 24 ft wide.

Who owns Harness RD over Hocum Hollow CR?

It is owned by the County Highway Agency.