SH 21 over Porters Creek
Burleson County, Texas · rated Fair in the 2025 National Bridge Inventory
United States Bridge Conditions2025 National Bridge Inventory, FHWACompiled
- SH 21 over Porters Creek in Burleson County, Texas, is rated in fair condition in the 2025 National Bridge Inventory (as of ).
- Its lowest-rated component is the culvert, rated 6 (satisfactory condition) on the 0-9 scale.
- It was built in 1968 and reconstructed in 1988, making it 57 years old at the 2025 inventory.
- It carries about 16,349 vehicles a day (traffic count year 2023).
- Its listed owner is the state highway agency.
- It is one of 50 of the 127 inventoried bridges in Burleson County rated fair (39.4%); 2 (1.6%) are rated poor.
- 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 → (30.58224, -96.63483)
Component ratings
| Component | Rating (2025) | FHWA scale meaning |
|---|---|---|
| Culvert | 6 | Satisfactory condition |
Bridge details
| Structure | Concrete culvert |
| Length | about 21 ft |
| Location | 4.7 Mi E of SH 36 |
| NBI structure number | 170260011603038 |
| Condition class | Fair |
Source: FHWA National Bridge Inventory, 2025 data as reported by the Texas department of transportation.
Busiest bridges in Burleson County
| Bridge | Built | Vehicles/day | Condition |
|---|---|---|---|
| SH 21 over Davidson Creek | 1968 | 19,649 | Good |
| SH 21 over Drainage Ditch | 2007 | 15,418 | Good |
| SH 21 over Greens Creek | 1964 | 15,418 | Fair |
| SH 21 over Small Creek | 1936 | 14,244 | Good |
| SH 36 over Thompson Creek | 1937 | 10,403 | Good |
| SH 21 WB over UP RR | 1979 | 8,655 | Good |
All bridges nearby: Burleson County, TX bridge conditions · every bridge in Burleson County · Texas bridges.
Background: how bridge ratings work · what "poor" and "structurally deficient" actually mean · how often bridges are inspected.