SP 421 EB
Carrying SP 421 EB over Alazan Creek
0.8 Mi W of IH 10, Bexar, Texas
Data updated May 2026
FHWA NBI record, refreshed with each annual release.
Bridge Snapshot: SP 421 EB
The SP 421 EB bridge in Bexar, Texas carries SP 421 EB over Alazan Creek. It was built in 2009, making it 17 years old today. The structure is built primarily of prestressed concrete and spans 3 sections, stretching 42.1 meters (138 feet) end to end. Daily traffic averages 31,404 vehicles, placing it in the heavily-trafficked tier of Texas bridges. It is owned and maintained by State Highway Agency.
The latest FHWA inspection records show a deck rating of 7/9, superstructure at 8/9, substructure at 7/9. The weakest component sits in good condition. No reported major component scores in the Poor range under the current federal condition thresholds. Its NBI inventory load rating is 32.7 metric tons.
Sourced from the FHWA National Bridge Inventory. See our methodology for refresh cadence and NBI release vintage.
How SP 421 EB compares
Live comparison across Texas.
Historical Sufficiency Rating
PlainBridge-computedFHWA discontinued this calculated item; it does not determine current condition, funding eligibility, posting, or closure. How the historical reference is calculated.
Condition Ratings
Full 0–9 scale + sufficiency-rating breakdown: how condition ratings work.
Structural Details
- Year Built
- 2009
- Material
- Prestressed Concrete
- Number of Spans
- 3
- Structure Length
- 42.1 m (138 ft)
- Deck Width
- 14.8 m (49 ft)
- Owner
- State Highway Agency
- Avg Daily Traffic
- 31,404 vehicles/day
- Structure Number
- 150150029111219
Location
Data Source
FHWA National Bridge Inventory (NBI).
FHWA NBI Program ↗Condition Analysis
- • At 7/9, the deck (driving surface) is in good shape and shows no significant wear.
- • At 8/9, the superstructure (beams and supports above the deck) is in good shape and shows no significant wear.
- • At 7/9, the substructure (piers and abutments) is in good shape and shows no significant wear.
How to read this record
This page shows what the last federal inspection recorded, not whether SP 421 EB is safe to cross today. Here is how to use it.
- NBI condition ratings reflect the latest record in this annual dataset, not a live status. Current routine inspection intervals are risk-based.
- Learn how the 0–9 condition scale and Good/Fair/Poor categories are defined. How condition ratings work
- Compare SP 421 EB against other structures in Bexar and across Texas. Texas bridges
- Noticed visible damage or a safety concern? Report it to the agency that owns the bridge, or call 911 in an emergency. How to report a bridge
Condition codes come straight from the FHWA National Bridge Inventory and are not a real-time safety judgment. Only the owning agency, a state DOT, county, or other owner, can post, restrict, or close a bridge.
Frequently Asked Questions
What do the condition ratings mean for SP 421 EB?
SP 421 EB in Bexar, Texas has a deck rating of 7/9, superstructure rating of 8/9, and substructure rating of 7/9 on the FHWA's 0–9 scale.
How often is SP 421 EB inspected?
SP 421 EB's responsible agency sets its routine interval under FHWA's risk-based inspection rules; this page does not expose the scheduled interval. It carries about 31,404 vehicles per day.
What does “structurally deficient” mean in older bridge reports?
FHWA retired that reported status beginning with the 2018 archive. SP 421 EB is currently shown as Good condition from its component ratings; that category is not a live closure or safety decision.
What is the inventory load rating for SP 421 EB?
SP 421 EB has an NBI inventory load rating of 32.7 metric tons.
Who is responsible for maintaining SP 421 EB?
SP 421 EB is owned and maintained by State Highway Agency.
How old is SP 421 EB and does age affect safety?
SP 421 EB was built in 2009, making it 17 years old.
Disclaimer: Bridge condition data is from the FHWA NBI and reflects the last reported inspection. A Poor condition rating is not a live declaration that a bridge is closed or unsafe for travel. For current closure, posting, or safety information, contact the responsible transportation agency.
Every figure on PlainBridge is rendered directly from federal source data, no number is typed in by an editor. This page draws directly on federal source data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.