Structure 121020050003229 · Harris County, TX
Carries IH 45 SB Pierce El over US 59 & Rr Misc ST, SW Of Downtown Houston.
7,484 ft end to end, longest span 92 ft: about 21 football fields, or 1.4 miles. Lengths are drawn to scale; at this length a semi-truck would be a speck. Each part is colored by its latest inspection rating. The inventory records lengths but not heights or the layout of the shorter spans, so those are drawn as typical for a multi-beam bridge.
| State | Texas |
| County | Harris |
| Location | SW Of Downtown Houston |
| Carries | IH 45 SB Pierce El |
| Crosses | US 59 & Rr Misc ST |
| Coordinates | 29.74936, -95.37127 |
| Material | Steel |
| Design | Stringer/Multi-beam |
| Total Length | 7483.9 ft (2281.1 m) |
| Max Span | 91.9 ft (28 m) |
| Deck Width | 52.5 ft (16 m) |
| Deck Area | 36497.6 sq m |
| Main Spans | 9 |
| Year Built | 1967 (reconstructed 1997) |
| Avg Daily Traffic | 124,161 (2017) |
| Truck Traffic | 7% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 99 |
| Last Inspection | October 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | Not applicable |
| Structure Number | 121020050003229 |
Inspectors rate each major part of a bridge (the deck you drive on, the superstructure of beams that holds it up, and the substructure of piers and abutments beneath) on a 0–9 scale. A bridge's overall condition is its lowest of those ratings, so one deteriorated component makes the whole bridge "poor."
A poor rating is not a closure. It means the bridge is flagged for priority repair or replacement; bridges judged unsafe are closed or posted with weight limits. The waterway (channel) rating is reported, but it does not count toward the overall classification.