Structure 121020005009519 · Harris County, TX
Carries US 290 Hov over Ih610 18th ST Fr, US 290 At IH 610.
Set by its lowest-rated component: Deck and Substructure at 7 of 9.
How ratings work6,448 ft end to end, longest span 248 ft: about 18 football fields, or 1.2 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 box-beam bridge.
| State | Texas |
| County | Harris |
| Location | US 290 At IH 610 |
| Carries | US 290 Hov |
| Crosses | Ih610 18th ST Fr |
| Coordinates | 29.80582, -95.45407 |
| Material | Steel Continuous |
| Design | Box Beam - Multiple |
| Total Length | 6448.2 ft (1965.4 m) |
| Max Span | 248.0 ft (75.6 m) |
| Deck Width | 24.3 ft (7.4 m) |
| Deck Area | 14544.0 sq m |
| Main Spans | 6 |
| Year Built | 2017 |
| Avg Daily Traffic | 10,000 (2016) |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 19 |
| Last Inspection | November 2024 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Not applicable |
| Structure Number | 121020005009519 |
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.