Alpine Street over Oligarchy Ditch
Fair Condition51 years old3,757 vehicles/day
Location
| State | Colorado |
| County | Boulder |
| Location | 100 Ft N Of E 9th AVE |
| Carries | Alpine Street |
| Crosses | Oligarchy Ditch |
| Coordinates | 40.17464, -105.08322 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 6 (Satisfactory) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 20.3 ft (6.2 m) |
| Max Span | 8.9 ft (2.7 m) |
| Deck Width | 64.0 ft (19.5 m) |
| Deck Area | 120.9 sq m |
| Main Spans | 2 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 3,757 (2023) |
| Truck Traffic | 9% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 125 |
| Inspection Frequency | Every 24 months |
| Owner | City/Municipal Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | LONG-ALP-E9TH |