US Bridges

Mo 100 E over Deer CR

Good

St. Louis County, Missouri · S 29 T 45 N R 6 E · Structure no. 3947

Built
1993
32 years old
Condition
Good
inspected June 2024
Type
Slab
Concrete Continuous
Length
136 ft
3 main spans
Daily traffic
14,968
2024 count
Owner
State
State Highway Agency

About this bridge

Mo 100 E over Deer CR is a concrete continuous slab carrying Mo 100 E over Deer CR in St. Louis County, Missouri. It was built in 1993, so it is 32 years old, younger than the Missouri average of 45.1 years.

The most recent inspection reported to the Federal Highway Administration rates it in good condition with a lowest component rating of 7 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 14,968 vehicles a day, roughly 13% of them trucks, projected to reach 20,955 by 2044. The structure is 136 ft (41.5 m) long and 70 ft wide. If it were closed, the detour would be 14.3 mi (23 km).

CarriesMo 100 E
CrossesDeer CR
LocationS 29 T 45 N R 6 E
RouteState Highway 100
Coordinates38.61081, -90.36002
Functional classUrban Other Principal Arterial

Condition and inspection

Good

All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure7 GoodSome minor problems.
Substructure7 GoodSome minor problems.
Channel and channel protection7 GoodSome minor problems.
Last inspectionJune 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation7: Better than 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 rating63.5 US tons
Inventory rating37.7 US tons

Structure

Structure typeSlab
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length136 ft (41.5 m)
Longest span49 ft (14.9 m)
Deck width70 ft (21.2 m)
Roadway width58 ft (17.7 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic14,968 (2024)
Projected traffic20,955 by 2044
Trucks13%
Lanes on structure4
Traffic directionTwo-way traffic
CarriesHighway and pedestrian
CrossesWaterway
Detour if closed14.3 mi (23 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 100 E over Deer CR built?

It was built in 1993, making it 32 years old in 2025.

What condition is Mo 100 E over Deer CR in?

The National Bridge Inventory rates it in good condition. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted. The last reported inspection was in June 2024.

How much traffic does Mo 100 E over Deer CR carry?

About 14,968 vehicles per day (2024 count), of which roughly 13% are trucks.

How long is Mo 100 E over Deer CR?

The structure is 136 ft (41.5 m) long with a longest span of 49 ft (14.9 m) and a deck 70 ft wide.

Who owns Mo 100 E over Deer CR?

It is owned by the State Highway Agency.