Structure D 360 · Carbon County, UT
Carries Sr-139 over Spring Glen Wash, Spring Glen So. Of Helper.
A culvert 23 ft across. 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 | Utah |
| County | Carbon |
| Location | Spring Glen So. Of Helper |
| Carries | Sr-139 |
| Crosses | Spring Glen Wash |
| Coordinates | 39.66434, -110.85550 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 22.6 ft (6.9 m) |
| Max Span | 20.7 ft (6.3 m) |
| Deck Width | 48.2 ft (14.7 m) |
| Deck Area | 101.4 sq m |
| Main Spans | 1 |
| Year Built | 1938 (reconstructed 1946) |
| Avg Daily Traffic | 1,225 (2014) |
| Truck Traffic | 16% |
| Lanes On Bridge | 2 |
| Last Inspection | August 2023 |
| Inspection Frequency | Every 24 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | 0D 360 |
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.