Structure 121020050801079 · Harris County, TX
Carries IH 10 Ebfr & Wbfr over Martin RD Ditch, At John Martin Rd..
A culvert 23 ft across with 4 openings. 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, so those are drawn as typical for a culvert.
| State | Texas |
| County | Harris |
| Location | At John Martin Rd. |
| Carries | IH 10 Ebfr & Wbfr |
| Crosses | Martin RD Ditch |
| Coordinates | 29.80220, -94.99757 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 23.0 ft (7 m) |
| Max Span | 4.9 ft (1.5 m) |
| Deck Width | 315.9 ft (96.3 m) |
| Deck Area | 674.1 sq m |
| Main Spans | 4 |
| Year Built | 1957 (reconstructed 1999) |
| Avg Daily Traffic | 11,160 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 5 |
| Last Inspection | September 2024 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is possibly eligible (requires evaluation) |
| Scour Critical | 6 — Scour calculated, stable |
| Structure Number | 121020050801079 |
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.