US Bridges

Mo 34 E over Castor Rvr

Fair

Bollinger County, Missouri · S 30 T 30 N R 8 W · Structure no. 3748

Built
1989
36 years old
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Steel Continuous
Length
373 ft
4 main spans
Daily traffic
1,099
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 34 E over Castor Rvr is a steel continuous stringer/multi-beam or girder carrying Mo 34 E over Castor Rvr in Bollinger County, Missouri. It was built in 1989, so it is 36 years old, younger 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 6 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 1,099 vehicles a day, roughly 7% of them trucks, projected to reach 1,923 by 2044. The structure is 373 ft (113.7 m) long and 35 ft wide. If it were closed, the detour would be 47.8 mi (77 km).

Location

Open in Google Maps
CarriesMo 34 E
CrossesCastor Rvr
LocationS 30 T 30 N R 8 W
RouteState Highway 34
CountyBollinger County
StateMissouri
Coordinates37.24676, -90.20475
Functional classRural Principal Arterial - Other

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck6 SatisfactoryStructural elements show some minor deterioration.
Superstructure8 Very GoodNo problems noted.
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 inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourCountermeasures installed to correct a previously existing problem
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating67.5 US tons
Inventory rating40.7 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialSteel Continuous
DeckConcrete, cast-in-place
Main spans4
Design loadHS 20
Structure length373 ft (113.7 m)
Longest span140 ft (42.7 m)
Deck width35 ft (10.8 m)
Roadway width32 ft (9.8 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic1,099 (2024)
Projected traffic1,923 by 2044
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed47.8 mi (77 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerState Highway Agency
Maintained byState 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 Mo 34 E over Castor Rvr built?

It was built in 1989, making it 36 years old in 2025.

What condition is Mo 34 E 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 Mo 34 E over Castor Rvr carry?

About 1,099 vehicles per day (2024 count), of which roughly 7% are trucks.

How long is Mo 34 E over Castor Rvr?

The structure is 373 ft (113.7 m) long with a longest span of 140 ft (42.7 m) and a deck 35 ft wide.

Who owns Mo 34 E over Castor Rvr?

It is owned by the State Highway Agency.