Structure 121020351006129 · Harris County, TX
Carries Sh99eb To IH 45 NB over IH 45 SH 99 Energy DR, At Jct IH 45 And SH 99.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.
How ratings work3,874 ft end to end, longest span 148 ft: about 11 football fields. Lengths and the semi-truck on the deck are drawn to the same scale. 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 | At Jct IH 45 And SH 99 |
| Carries | Sh99eb To IH 45 NB |
| Crosses | IH 45 SH 99 Energy DR |
| Coordinates | 30.09241, -95.43715 |
| Material | Prestressed Concrete |
| Design | Stringer/Multi-beam |
| Total Length | 3874.0 ft (1180.8 m) |
| Max Span | 148.0 ft (45.1 m) |
| Deck Width | 27.9 ft (8.5 m) |
| Deck Area | 10036.8 sq m |
| Main Spans | 29 |
| Year Built | 2016 |
| Avg Daily Traffic | 500 (2016) |
| Truck Traffic | 1% |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 22 |
| Last Inspection | November 2022 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Not applicable |
| Structure Number | 121020351006129 |
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.