US Bridges

New Ballwin Road over Spring Br

Good

St. Louis County, Missouri · S 15 T 44 N R 4 E · Structure no. 36631

Built
2021
4 years old
Condition
Good
inspected April 2024
Type
Stringer/Multi-beam or Girder
Prestressed Concrete
Length
60 ft
1 main span
Daily traffic
772
2023 count
Owner
County
County Highway Agency

About this bridge

New Ballwin Road over Spring Br is a prestressed concrete stringer/multi-beam or girder carrying New Ballwin Road over Spring Br in St. Louis County, Missouri. It was built in 2021, so it is 4 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 9 out of 9. All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.

It carries about 772 vehicles a day, roughly 5% of them trucks, projected to reach 1,042 by 2043. The structure is 60 ft (18.3 m) long and 32 ft wide. If it were closed, the detour would be 123.7 mi (199 km).

Location

Open in Google Maps
CarriesNew Ballwin Road
CrossesSpring Br
LocationS 15 T 44 N R 4 E
RouteCounty Highway 96
CountySt. Louis County
StateMissouri
Coordinates38.55322, -90.55185
Functional classUrban Local

Condition and inspection

Good

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

ComponentRatingMeaning
Deck9 ExcellentNo problems noted.
Superstructure9 ExcellentNo problems noted.
Substructure9 ExcellentNo problems noted.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionApril 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation9: Superior to present desirable criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating68.5 US tons
Inventory rating52.6 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialPrestressed Concrete
DeckConcrete, cast-in-place
Main spans1
Design loadHS 20
Structure length60 ft (18.3 m)
Longest span56 ft (17.2 m)
Deck width32 ft (9.8 m)
Roadway width30 ft (9 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic772 (2023)
Projected traffic1,042 by 2043
Trucks5%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed123.7 mi (199 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty 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 New Ballwin Road over Spring Br built?

It was built in 2021, making it 4 years old in 2025.

What condition is New Ballwin Road over Spring Br 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 April 2024.

How much traffic does New Ballwin Road over Spring Br carry?

About 772 vehicles per day (2023 count), of which roughly 5% are trucks.

How long is New Ballwin Road over Spring Br?

The structure is 60 ft (18.3 m) long with a longest span of 56 ft (17.2 m) and a deck 32 ft wide.

Who owns New Ballwin Road over Spring Br?

It is owned by the County Highway Agency.