US Bridges

CR 320 over Castor Rvr

Good

Madison County, Missouri · S 28 T 31 N R 8 E · Structure no. 35400

Built
2016
9 years old
Condition
Good
inspected December 2023
Type
Box Beam or Girders - Multiple
Prestressed Concrete
Length
64 ft
1 main span
Daily traffic
50
2024 count
Owner
County
County Highway Agency

About this bridge

CR 320 over Castor Rvr is a prestressed concrete box beam or girders - multiple carrying CR 320 over Castor Rvr in Madison County, Missouri. It was built in 2016, so it is 9 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 50 vehicles a day, roughly 10% of them trucks, projected to reach 65 by 2044. The structure is 64 ft (19.5 m) long and 12 ft wide. If it were closed, the detour would be 6.8 mi (11 km).

Location

Open in Google Maps
CarriesCR 320
CrossesCastor Rvr
LocationS 28 T 31 N R 8 E
RouteCounty Highway 79
CountyMadison County
StateMissouri
Coordinates37.34153, -90.17397
Functional classRural Local

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure9 ExcellentNo problems noted.
Channel and channel protection7 GoodSome minor problems.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than present minimum criteria
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment4: Meets minimum tolerable limits to be left in place as is
Operating rating95.2 US tons
Inventory rating57.5 US tons

Structure

Structure typeBox Beam or Girders - Multiple
MaterialPrestressed Concrete
DeckOther
Main spans1
Design loadHS 20
Structure length64 ft (19.5 m)
Longest span62 ft (18.9 m)
Deck width12 ft (3.7 m)
Roadway width12 ft (3.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic50 (2024)
Projected traffic65 by 2044
Trucks10%
Lanes on structure1
Traffic directionOne-lane bridge for two-way traffic
CarriesHighway
CrossesWaterway
Detour if closed6.8 mi (11 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 CR 320 over Castor Rvr built?

It was built in 2016, making it 9 years old in 2025.

What condition is CR 320 over Castor Rvr in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in December 2023.

How much traffic does CR 320 over Castor Rvr carry?

About 50 vehicles per day (2024 count), of which roughly 10% are trucks.

How long is CR 320 over Castor Rvr?

The structure is 64 ft (19.5 m) long with a longest span of 62 ft (18.9 m) and a deck 12 ft wide.

Who owns CR 320 over Castor Rvr?

It is owned by the County Highway Agency.