US Bridges

County RD 317 over Richland CR

Fair

Howard County, Missouri · S 12 T 50 N R 18 W · Structure no. 17019

Built
1963
62 years old
Condition
Fair
inspected February 2024
Type
Stringer/Multi-beam or Girder
Steel
Length
144 ft
4 main spans
Daily traffic
45
2024 count
Owner
County
County Highway Agency

About this bridge

County RD 317 over Richland CR is a steel stringer/multi-beam or girder carrying County RD 317 over Richland CR in Howard County, Missouri. It was built in 1963, so it is 62 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 45 vehicles a day, roughly 10% of them trucks, projected to reach 50 by 2044. The structure is 144 ft (43.9 m) long and 18 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

Location

Open in Google Maps
CarriesCounty RD 317
CrossesRichland CR
LocationS 12 T 50 N R 18 W
RouteCounty Highway 140
CountyHoward County
StateMissouri
Coordinates39.15616, -92.89239
Functional classRural 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionFebruary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating33.7 US tons
Inventory rating19.8 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel
DeckConcrete, cast-in-place
Main spans4
Design loadOther
Structure length144 ft (43.9 m)
Longest span35 ft (10.8 m)
Deck width18 ft (5.5 m)
Roadway width17 ft (5.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic45 (2024)
Projected traffic50 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 proposedRehabilitation because of general structure deterioration or inadequate strength
Estimated improvement cost$668,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD 317 over Richland CR built?

It was built in 1963, making it 62 years old in 2025.

What condition is County RD 317 over Richland 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 2024.

How much traffic does County RD 317 over Richland CR carry?

About 45 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD 317 over Richland CR?

The structure is 144 ft (43.9 m) long with a longest span of 35 ft (10.8 m) and a deck 18 ft wide.

Who owns County RD 317 over Richland CR?

It is owned by the County Highway Agency.