US Bridges

Mo 13 N over Brush CR

Poor

St. Clair County, Missouri · S 34 T 38 N R 25 W · Structure no. 11912

Built
1962
63 years old
Condition
Poor
inspected September 2024
Type
Slab
Concrete Continuous
Length
99 ft
3 main spans
Daily traffic
5,727
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 13 N over Brush CR is a concrete continuous slab carrying Mo 13 N over Brush CR in St. Clair County, Missouri. It was built in 1962, so it is 63 years old, older than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 4 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

It carries about 5,727 vehicles a day, roughly 32% of them trucks, projected to reach 10,022 by 2044. The structure is 99 ft (30.2 m) long and 31 ft wide. If it were closed, the detour would be 11.8 mi (19 km).

CarriesMo 13 N
CrossesBrush CR
LocationS 34 T 38 N R 25 W
RouteState Highway 13
Coordinates38.01827, -93.66538
Functional classRural Principal Arterial - Other

Condition and inspection

Poor

The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.

ComponentRatingMeaning
Deck4 PoorAdvanced section loss, deterioration, spalling or scour.
Superstructure4 PoorAdvanced section loss, deterioration, spalling or scour.
Substructure5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionSeptember 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation4: Meets minimum tolerable limits to be left in place as is
Deck geometry4: Meets minimum tolerable limits to be left in place as is
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating53.6 US tons
Inventory rating31.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadH 20
Structure length99 ft (30.2 m)
Longest span33 ft (10.1 m)
Deck width31 ft (9.6 m)
Roadway width31 ft (9.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic5,727 (2024)
Projected traffic10,022 by 2044
Trucks32%
Lanes on structure2
Traffic directionOne-way traffic
CarriesHighway
CrossesWaterway
Detour if closed11.8 mi (19 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 proposedReplacement because of substandard load-carrying capacity or roadway geometry
Estimated improvement cost$1.2 million (2025 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Mo 13 N over Brush CR built?

It was built in 1962, making it 63 years old in 2025.

What condition is Mo 13 N over Brush CR in?

The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in September 2024.

How much traffic does Mo 13 N over Brush CR carry?

About 5,727 vehicles per day (2024 count), of which roughly 32% are trucks.

How long is Mo 13 N over Brush CR?

The structure is 99 ft (30.2 m) long with a longest span of 33 ft (10.1 m) and a deck 31 ft wide.

Who owns Mo 13 N over Brush CR?

It is owned by the State Highway Agency.