Structure 180430036404625 · Collin County, TX
Carries SH 121 N To Dnt N over Dnt & SH 121, Dnt & SH 121 Toll RD.
Set by its lowest-rated component: Deck and Superstructure and Substructure at 7 of 9.
How ratings work4,280 ft end to end, longest span 301 ft: about 12 football fields. 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 | Collin |
| Location | Dnt & SH 121 Toll RD |
| Carries | SH 121 N To Dnt N |
| Crosses | Dnt & SH 121 |
| Coordinates | 33.09096, -96.82354 |
| Material | Steel Continuous |
| Design | Stringer/Multi-beam |
| Total Length | 4279.9 ft (1304.5 m) |
| Max Span | 300.9 ft (91.7 m) |
| Deck Width | 27.9 ft (8.5 m) |
| Deck Area | 11088.2 sq m |
| Main Spans | 6 |
| Year Built | 2011 |
| Avg Daily Traffic | 10,000 (2010) |
| Truck Traffic | 2% |
| Lanes On Bridge | 1 |
| Lanes Under Bridge | 26 |
| Last Inspection | November 2023 |
| Inspection Frequency | Every 24 months |
| Owner | Local Toll Authority |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | Not applicable |
| Structure Number | 180430036404625 |
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.