US Bridges

Mexico RD over Spencer CR

Fair

St. Charles County, Missouri · S 32 T 47 N R 4 E · Structure no. 23076

Built
1987
38 years old
Condition
Fair
inspected January 2024
Type
Culvert
Concrete
Length
47 ft
3 main spans
Daily traffic
23,000
2024 count
Owner
City
City or Municipal Highway Agency

About this bridge

Mexico RD over Spencer CR is a concrete culvert carrying Mexico RD over Spencer CR in St. Charles County, Missouri. It was built in 1987, so it is 38 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 5 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 23,000 vehicles a day, roughly 5% of them trucks, projected to reach 35,650 by 2044. The structure is 47 ft (14.3 m) long and 62 ft wide. If it were closed, the detour would be 5 mi (8 km).

Location

Open in Google Maps
CarriesMexico RD
CrossesSpencer CR
LocationS 32 T 47 N R 4 E
RouteCity Street 0
CountySt. Charles County
StateMissouri
Coordinates38.79182, -90.60133
Functional classUrban Other Principal 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 protection5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJanuary 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry9: Superior to present desirable criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating54.6 US tons
Inventory rating24.8 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckNot applicable
Main spans3
Design loadOther
Structure length47 ft (14.3 m)
Longest span15 ft (4.6 m)
Deck width62 ft (18.9 m)
Roadway width62 ft (18.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic23,000 (2024)
Projected traffic35,650 by 2044
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed5 mi (8 km)
TollOn a free road
National Highway SystemYes

Ownership and planned work

OwnerCity or Municipal Highway Agency
Maintained byCity or Municipal 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 Mexico RD over Spencer CR built?

It was built in 1987, making it 38 years old in 2025.

What condition is Mexico RD over Spencer 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 January 2024.

How much traffic does Mexico RD over Spencer CR carry?

About 23,000 vehicles per day (2024 count), of which roughly 5% are trucks.

How long is Mexico RD over Spencer CR?

The structure is 47 ft (14.3 m) long with a longest span of 15 ft (4.6 m) and a deck 62 ft wide.

Who owns Mexico RD over Spencer CR?

It is owned by the City or Municipal Highway Agency.