Structure 9600S · Hennepin County, MN
Carries Mn 77 over Minnesota R ; Black Dog, 1.0 Mi N Of Jct TH 13.
Set by its lowest-rated component: Superstructure and Substructure at 5 of 9.
How ratings work5,185 ft end to end: about 14 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 through arch.
| State | Minnesota |
| County | Hennepin |
| Location | 1.0 Mi N Of Jct TH 13 |
| Carries | Mn 77 |
| Crosses | Minnesota R ; Black Dog |
| Coordinates | 44.82708, -93.23170 |
| Material | Steel |
| Design | Arch - Thru |
| Total Length | 5184.7 ft (1580.3 m) |
| Max Span | 359.9 ft (109.7 m) |
| Deck Width | 59.7 ft (18.2 m) |
| Deck Area | 28761.5 sq m |
| Main Spans | 1 |
| Year Built | 1978 |
| Avg Daily Traffic | 45,951 (2022) |
| Truck Traffic | 3% |
| Lanes On Bridge | 3 |
| Lanes Under Bridge | 2 |
| Last Inspection | July 2024 |
| Inspection Frequency | Every 12 months |
| Owner | State Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 5 — Stable for scour |
| Structure Number | 9600S |
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.