Structure BC-3-2.3-IDA · Boulder County, CO
Carries N 115th ST over Highland Ditch, 0.95 Mi N Of Vermillion R.
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 | Colorado |
| County | Boulder |
| Location | 0.95 Mi N Of Vermillion R |
| Carries | N 115th ST |
| Crosses | Highland Ditch |
| Coordinates | 40.23126, -105.08355 |
| Material | Concrete |
| Design | Culvert |
| Total Length | 23.0 ft (7 m) |
| Max Span | 23.0 ft (7 m) |
| Deck Width | 34.8 ft (10.6 m) |
| Deck Area | 74.2 sq m |
| Main Spans | 1 |
| Year Built | 2012 |
| Avg Daily Traffic | 435 (2023) |
| Truck Traffic | 16% |
| Lanes On Bridge | 2 |
| Last Inspection | February 2025 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Scour Critical | 8 — Stable, low risk |
| Structure Number | BC-3-2.3-IDA |
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.