US Bridges

Or 70 E over Spencer CR

Good

St. Charles County, Missouri · S 27 T 47 N R 4 E · Structure no. 4170

Built
1995
30 years old
Condition
Good
inspected September 2023
Type
Stringer/Multi-beam or Girder
Prestressed Concrete Continuous
Length
100 ft
3 main spans
Daily traffic
7,304
2024 count
Owner
State
State Highway Agency

About this bridge

Or 70 E over Spencer CR is a prestressed concrete continuous stringer/multi-beam or girder carrying Or 70 E over Spencer CR in St. Charles County, Missouri. It was built in 1995, so it is 30 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 7,304 vehicles a day, roughly 4% of them trucks, projected to reach 14,243 by 2044. The structure is 100 ft (30.5 m) long and 47 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesOr 70 E
CrossesSpencer CR
LocationS 27 T 47 N R 4 E
RouteState Highway 70
CountySt. Charles County
StateMissouri
Coordinates38.79833, -90.60567
Functional classUrban Collector

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.
Superstructure8 Very GoodNo problems noted.
Substructure8 Very GoodNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionSeptember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry6: Equal to present minimum criteria
Waterway adequacy8: Equal to present desirable criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating88.3 US tons
Inventory rating53.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete Continuous
DeckConcrete, cast-in-place
Main spans3
Design loadHS 20 + Mod
Structure length100 ft (30.5 m)
Longest span33 ft (10.2 m)
Deck width47 ft (14.2 m)
Roadway width44 ft (13.4 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic7,304 (2024)
Projected traffic14,243 by 2044
Trucks4%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed1.9 mi (3 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 Or 70 E over Spencer CR built?

It was built in 1995, making it 30 years old in 2025.

What condition is Or 70 E over Spencer 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 September 2023.

How much traffic does Or 70 E over Spencer CR carry?

About 7,304 vehicles per day (2024 count), of which roughly 4% are trucks.

How long is Or 70 E over Spencer CR?

The structure is 100 ft (30.5 m) long with a longest span of 33 ft (10.2 m) and a deck 47 ft wide.

Who owns Or 70 E over Spencer CR?

It is owned by the State Highway Agency.