120th Street over Rock Creek
Fair Condition40 years old3,390 vehicles/day
Location
| State | Colorado |
| County | Boulder |
| Location | 0.5 Mi S Of S. Boulder RD |
| Carries | 120th Street |
| Crosses | Rock Creek |
| Coordinates | 39.97711, -105.07200 |
Condition Ratings
| Overall Condition | Fair |
| Channel/Waterway | 8 (Very Good) |
| Culvert | 6 (Satisfactory) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Concrete |
| Design | Culvert |
| Total Length | 41.3 ft (12.6 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 69.9 ft (21.3 m) |
| Deck Area | 268.4 sq m |
| Main Spans | 2 |
| Year Built | 1986 (reconstructed 2000) |
Traffic
| Avg Daily Traffic | 3,390 (2023) |
| Truck Traffic | 30% |
| Lanes On Bridge | 3 |
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 | LAF-120TH-001B |