SH 21 over RR & Ayish Byu & City St
San Augustine County, Texas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 21 over RR & Ayish Byu & City St in San Augustine County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the deck, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1984, making it 41 years old at the 2025 inventory.
- It carries about 5,300 vehicles a day (traffic count year 2024).
- Its listed owner is the state highway agency.
- It is one of 49 of the 94 inventoried bridges in San Augustine County rated fair (52.1%); 0 (0.0%) are rated poor.
- Its traffic status in the 2025 inventory is open, no restriction (NBI item 41).
- Its class is unchanged from 2024 (fair), but component ratings moved: deck 5 to 6.
- Its most recent inspection on record is dated May 2024, on a 24-month routine inspection cycle.
- A fair rating means the lowest-rated major component scores 5 or 6 on FHWA's 0-9 scale: some deterioration or minor section loss, but the structure is sound. It is the middle class, not a warning.
View this bridge on a map → (31.53001, -94.11442)
Component ratings
| Component | Rating (2024) | Rating (2025) | FHWA scale meaning |
|---|---|---|---|
| Deck | 5 | 6 | Satisfactory condition |
| Superstructure | 7 | 7 | Good condition |
| Substructure | 6 | 6 | Satisfactory condition |
Bridge details
| Structure | Prestressed concrete stringer or multi-beam girder |
| Length | about 979 ft |
| Location | 0.60 Mi E of US 96 |
| NBI structure number | 112030011810076 |
| Condition class | Fair |
| Traffic status (item 41) | Open, no restriction |
| Last inspection (item 90) | May 2024 |
| Inspection interval (item 91) | 24 months |
| Scour (item 113) | 5: foundations stable, scour within the limits of the footing or piles |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in San Augustine County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 103 over Attoyac Bayou | 1965 | 5,015 | Fair |
| SH 103 over Turkey Creek | 1954 | 4,123 | Good |
| SH 103 over Johnson Creek | 1950 | 3,359 | Fair |
| SH 21 over Perkins Creek | 2017 | 3,341 | Good |
| US 96 over Ayish Bayou | 2017 | 3,299 | Good |
| SH 103 over US 96 | 1971 | 3,095 | Fair |
All bridges nearby: San Augustine County, TX bridge conditions · every bridge in San Augustine County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.