15th Avenue over Oligarchy Ditch
Fair Condition37 years old450 vehicles/day
Location
| State | Colorado |
| County | Boulder |
| Location | 100 Ft W Of Lamplighte DR |
| Carries | 15th Avenue |
| Crosses | Oligarchy Ditch |
| Coordinates | 40.18494, -105.09175 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Frame |
| Total Length | 21.7 ft (6.6 m) |
| Max Span | 20.3 ft (6.2 m) |
| Deck Width | 55.4 ft (16.9 m) |
| Deck Area | 111.5 sq m |
| Main Spans | 1 |
| Year Built | 1989 |
Traffic
| Avg Daily Traffic | 450 (2023) |
| Truck Traffic | 6% |
| 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-15TH-LAMP |