US Bridges

Seminary RD over Boone CR

Fair

Franklin County, Missouri · S 9 T 40 N R 3 W · Structure no. 22882

Built
1989
36 years old
Condition
Fair
inspected March 2023
Type
Tee Beam
Prestressed Concrete
Length
98 ft
3 main spans
Daily traffic
250
2023 count
Owner
County
County Highway Agency

About this bridge

Seminary RD over Boone CR is a prestressed concrete tee beam carrying Seminary RD over Boone CR in Franklin 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 250 vehicles a day, roughly 18% of them trucks, projected to reach 450 by 2043. The structure is 98 ft (29.9 m) long and 27 ft wide. If it were closed, the detour would be 9.9 mi (16 km).

Location

Open in Google Maps
CarriesSeminary RD
CrossesBoone CR
LocationS 9 T 40 N R 3 W
RouteCounty Highway 378
CountyFranklin County
StateMissouri
Coordinates38.21502, -91.2689
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
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionMarch 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
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 alignment5: Somewhat better than minimum adequacy to tolerate being left in place as is
Operating rating54.6 US tons
Inventory rating35.7 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans3
Design loadOther
Structure length98 ft (29.9 m)
Longest span38 ft (11.6 m)
Deck width27 ft (8.1 m)
Roadway width24 ft (7.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic250 (2023)
Projected traffic450 by 2043
Trucks18%
Lanes on structure2
Traffic directionTwo-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 proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Seminary RD over Boone CR built?

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

What condition is Seminary RD over Boone 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 March 2023.

How much traffic does Seminary RD over Boone CR carry?

About 250 vehicles per day (2023 count), of which roughly 18% are trucks.

How long is Seminary RD over Boone CR?

The structure is 98 ft (29.9 m) long with a longest span of 38 ft (11.6 m) and a deck 27 ft wide.

Who owns Seminary RD over Boone CR?

It is owned by the County Highway Agency.