US Bridges

Spur 406 over Flat Creek

Good

Val Verde County, Texas · 1.25 MI SE of US 90 · Structure no. 222330002215045

Built
1938
87 years old
Condition
Good
inspected October 2024
Type
Culvert
Concrete
Length
39 ft
6 main spans
Daily traffic
100
2020 count
Owner
State
State Highway Agency

About this bridge

Spur 406 over Flat Creek is a concrete culvert carrying Spur 406 over Flat Creek in Val Verde County, Texas. It was built in 1938, so it is 87 years old, older than the Texas average of 44.4 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 100 vehicles a day, roughly 7% of them trucks, projected to reach 60 by 2036. The structure is 39 ft (11.9 m) long and 37 ft wide. If it were closed, the detour would be 98.8 mi (159 km).

CarriesSpur 406
CrossesFlat Creek
Location1.25 MI SE of US 90
RouteState Highway 406
StateTexas
Coordinates29.58798, -101.05362
Functional classRural Major Collector

Condition and inspection

Good

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

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert7 GoodSome minor problems.
Last inspectionOctober 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation6: Equal to present minimum criteria
Deck geometry9: Superior to present desirable criteria
Waterway adequacy6: Equal to present minimum criteria
Approach roadway alignment8: Equal to present desirable criteria
Operating rating44 US tons
Inventory rating26 US tons

Structure

Structure typeCulvert
MaterialConcrete
DeckConcrete, cast-in-place
Main spans6
Design loadH 15
Structure length39 ft (11.9 m)
Longest span6 ft (1.8 m)
Deck width37 ft (11.3 m)
Roadway width34 ft (10.3 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2020)
Projected traffic60 by 2036
Trucks7%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed98.8 mi (159 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerState Highway Agency
Maintained byState Highway Agency
Historic statusPossibly eligible for the National Register; requires further investigation
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was Spur 406 over Flat Creek built?

It was built in 1938, making it 87 years old in 2025.

What condition is Spur 406 over Flat Creek 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 October 2024.

How much traffic does Spur 406 over Flat Creek carry?

About 100 vehicles per day (2020 count), of which roughly 7% are trucks.

How long is Spur 406 over Flat Creek?

The structure is 39 ft (11.9 m) long with a longest span of 6 ft (1.8 m) and a deck 37 ft wide.

Who owns Spur 406 over Flat Creek?

It is owned by the State Highway Agency.