US Bridges

County RD #208 over Br of Castor Rvr

Fair

Madison County, Missouri · S 16 T 33 N R 8 E · Structure no. 12835

Built
1923
102 years old
Condition
Fair
inspected December 2023
Type
Culvert
Concrete
Length
29 ft
2 main spans
Daily traffic
15
2024 count
Owner
County
County Highway Agency

About this bridge

County RD #208 over Br of Castor Rvr is a concrete culvert carrying County RD #208 over Br of Castor Rvr in Madison County, Missouri. It was built in 1923, so it is 102 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 15 vehicles a day, roughly 10% of them trucks, projected to reach 20 by 2044. The structure is 29 ft (8.8 m) long and 12 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesCounty RD #208
CrossesBr of Castor Rvr
LocationS 16 T 33 N R 8 E
RouteCounty Highway 21
CountyMadison County
StateMissouri
Coordinates37.55317, -90.17294
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 protection6 SatisfactoryStructural elements show some minor deterioration.
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
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry2: Basically intolerable, requiring high priority of replacement
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating54.6 US tons
Inventory rating17.9 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans2
Design loadOther
Structure length29 ft (8.8 m)
Longest span13 ft (4 m)
Deck width12 ft (3.7 m)
Roadway width11 ft (3.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic15 (2024)
Projected traffic20 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed9.9 mi (16 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 #208 over Br of Castor Rvr built?

It was built in 1923, making it 102 years old in 2025.

What condition is County RD #208 over Br of 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 #208 over Br of Castor Rvr carry?

About 15 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is County RD #208 over Br of Castor Rvr?

The structure is 29 ft (8.8 m) long with a longest span of 13 ft (4 m) and a deck 12 ft wide.

Who owns County RD #208 over Br of Castor Rvr?

It is owned by the County Highway Agency.