SP 421 EB over Alazan Creek
GoodBexar County, Texas · 0.8 MI W of IH 10 · Structure no. 150150029111219
- Built
- 2009
- 16 years old
- Condition
- Good
- inspected August 2024
- Type
- Stringer/Multi-beam or Girder
- Prestressed Concrete
- Length
- 138 ft
- 3 main spans
- Daily traffic
- 31,404
- 2019 count
- Owner
- State
- State Highway Agency
About this bridge
SP 421 EB over Alazan Creek is a prestressed concrete stringer/multi-beam or girder carrying SP 421 EB over Alazan Creek in Bexar County, Texas. It was built in 2009, so it is 16 years old, younger 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 31,404 vehicles a day, roughly 7% of them trucks, projected to reach 21,000 by 2036. The structure is 138 ft (42.1 m) long and 49 ft wide. If it were closed, the detour would be 1.2 mi (2 km).
Location
Open in Google MapsCondition and inspection
All primary components (deck, superstructure, substructure, or culvert) are rated 7 or higher. No significant problems were noted.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 7 Good | Some minor problems. |
| Superstructure | 8 Very Good | No problems noted. |
| Substructure | 7 Good | Some minor problems. |
| Channel and channel protection | 7 Good | Some minor problems. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was SP 421 EB over Alazan Creek built?
It was built in 2009, making it 16 years old in 2025.
What condition is SP 421 EB over Alazan 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 August 2024.
How much traffic does SP 421 EB over Alazan Creek carry?
About 31,404 vehicles per day (2019 count), of which roughly 7% are trucks.
How long is SP 421 EB over Alazan Creek?
The structure is 138 ft (42.1 m) long with a longest span of 46 ft (14 m) and a deck 49 ft wide.
Who owns SP 421 EB over Alazan Creek?
It is owned by the State Highway Agency.