Spencer Street over Oligarchy Ditch
Fair Condition51 years old995 vehicles/day
Location
| State | Colorado |
| County | Boulder |
| Location | 50 Ft So Of 20th ST |
| Carries | Spencer Street |
| Crosses | Oligarchy Ditch |
| Coordinates | 40.19311, -105.12577 |
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 | 20.7 ft (6.3 m) |
| Max Span | 9.8 ft (3 m) |
| Deck Width | 51.8 ft (15.8 m) |
| Deck Area | 99.5 sq m |
| Main Spans | 2 |
| Year Built | 1975 |
Traffic
| Avg Daily Traffic | 995 (2023) |
| Truck Traffic | 3% |
| 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-SPEN-21ST |