US Bridges

County RD #313 over Castor Rvr

Fair

Madison County, Missouri · S 30 T 31 N R 8 E · Structure no. 16176

Built
1935
90 years old
Condition
Fair
inspected December 2023
Type
Culvert
Steel
Length
87 ft
30 main spans
Daily traffic
25
2024 count
Owner
County
County Highway Agency

About this bridge

County RD #313 over Castor Rvr is a steel culvert carrying County RD #313 over Castor Rvr in Madison County, Missouri. It was built in 1935, so it is 90 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 25 vehicles a day, roughly 10% of them trucks, projected to reach 33 by 2044. The structure is 87 ft (26.5 m) long and 11 ft wide. If it were closed, the detour would be 11.2 mi (18 km).

Location

Open in Google Maps
CarriesCounty RD #313
CrossesCastor Rvr
LocationS 30 T 31 N R 8 E
RouteCounty Highway 113
CountyMadison County
StateMissouri
Coordinates37.33144, -90.21339
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
Channel and channel protection4 PoorAdvanced section loss, deterioration, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionDecember 2023
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 geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy4: Meets minimum tolerable limits to be left in place as is
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialSteel
DeckConcrete, cast-in-place
Main spans30
Design loadOther
Structure length87 ft (26.5 m)
Longest span3 ft (0.9 m)
Deck width11 ft (3.5 m)
Roadway width11 ft (3.5 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic25 (2024)
Projected traffic33 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.2 mi (18 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$225,000 (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was County RD #313 over Castor Rvr built?

It was built in 1935, making it 90 years old in 2025.

What condition is County RD #313 over Castor Rvr 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 2023.

How much traffic does County RD #313 over Castor Rvr carry?

About 25 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD #313 over Castor Rvr?

The structure is 87 ft (26.5 m) long with a longest span of 3 ft (0.9 m) and a deck 11 ft wide.

Who owns County RD #313 over Castor Rvr?

It is owned by the County Highway Agency.