SH 21 over Trinity River
Fair Condition67 years old2,868 vehicles/day
Location
| State | Texas |
| County | Houston |
| Location | 3.1 Mi SW Of FM 2498 |
| Carries | SH 21 |
| Crosses | Trinity River |
| Coordinates | 31.08001, -95.69811 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 5 (Fair) |
| Channel/Waterway | 4 (Poor) |
| Scour Critical | 4 — Foundations need monitoring |
Physical Characteristics
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 3667.0 ft (1117.7 m) |
| Max Span | 149.9 ft (45.7 m) |
| Deck Width | 31.2 ft (9.5 m) |
| Deck Area | 10618.1 sq m |
| Main Spans | 3 |
| Year Built | 1959 |
Traffic
| Avg Daily Traffic | 2,868 (2024) |
| Truck Traffic | 20% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 624 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Structure Number | 111140011706067 |