US Bridges

Allen Road over Sandy Crk

Good

Jefferson County, Missouri · S 907 T 41 N R 5 E · Structure no. 37039

Built
2023
2 years old
Condition
Good
inspected January 2025
Type
Tee Beam
Prestressed Concrete
Length
98 ft
1 main span
Daily traffic
200
2023 count
Owner
County
County Highway Agency

About this bridge

Allen Road over Sandy Crk is a prestressed concrete tee beam carrying Allen Road over Sandy Crk in Jefferson County, Missouri. It was built in 2023, so it is 2 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 8 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 200 vehicles a day, roughly 10% of them trucks, projected to reach 400 by 2043. The structure is 98 ft (30 m) long and 29 ft wide. If it were closed, the detour would be 1.9 mi (3 km).

Location

Open in Google Maps
CarriesAllen Road
CrossesSandy Crk
LocationS 907 T 41 N R 5 E
RouteCounty Highway 220
CountyJefferson County
StateMissouri
Coordinates38.29307, -90.49692
Functional classRural Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck8 Very GoodNo problems noted.
Superstructure8 Very GoodNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection8 Very GoodNo problems noted.
Last inspectionJanuary 2025
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation8: Equal to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy9: Superior to present desirable criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating110.1 US tons
Inventory rating78.4 US tons

Structure

Structure typeTee Beam
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length98 ft (30 m)
Longest span95 ft (29 m)
Deck width29 ft (8.7 m)
Roadway width26 ft (7.9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic200 (2023)
Projected traffic400 by 2043
Trucks10%
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

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Allen Road over Sandy Crk built?

It was built in 2023, making it 2 years old in 2025.

What condition is Allen Road over Sandy Crk 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 January 2025.

How much traffic does Allen Road over Sandy Crk carry?

About 200 vehicles per day (2023 count), of which roughly 10% are trucks.

How long is Allen Road over Sandy Crk?

The structure is 98 ft (30 m) long with a longest span of 95 ft (29 m) and a deck 29 ft wide.

Who owns Allen Road over Sandy Crk?

It is owned by the County Highway Agency.