US Bridges

Mo 45 S over Brown Br

Fair

Platte County, Missouri · S 14 T 51 N R 35 W · Structure no. 5627

Built
1932
93 years old
Condition
Fair
inspected December 2024
Type
Culvert
Concrete Continuous
Length
33 ft
2 main spans
Daily traffic
5,048
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 45 S over Brown Br is a concrete continuous culvert carrying Mo 45 S over Brown Br in Platte County, Missouri. It was built in 1932, so it is 93 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 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 5,048 vehicles a day, roughly 12% of them trucks, projected to reach 9,591 by 2044. The structure is 33 ft (10 m) long and 45 ft wide. If it were closed, the detour would be 31.1 mi (50 km).

CarriesMo 45 S
CrossesBrown Br
LocationS 14 T 51 N R 35 W
RouteState Highway 45
Coordinates39.23659, -94.79912
Functional classRural Minor Arterial

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.
Culvert6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2024
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 adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating85.3 US tons
Inventory rating50.6 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckNot applicable
Main spans2
Design loadH 15
Structure length33 ft (10 m)
Longest span10 ft (3 m)
Deck width45 ft (13.7 m)
Roadway width43 ft (13 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,048 (2024)
Projected traffic9,591 by 2044
Trucks12%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed31.1 mi (50 km)
TollOn a free road
National Highway SystemNo

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 45 S over Brown Br built?

It was built in 1932, making it 93 years old in 2025.

What condition is Mo 45 S over Brown Br 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 2024.

How much traffic does Mo 45 S over Brown Br carry?

About 5,048 vehicles per day (2024 count), of which roughly 12% are trucks.

How long is Mo 45 S over Brown Br?

The structure is 33 ft (10 m) long with a longest span of 10 ft (3 m) and a deck 45 ft wide.

Who owns Mo 45 S over Brown Br?

It is owned by the State Highway Agency.