N 63rd ST (cr 39) over Lefthand Creek
Good Condition15 years old2,610 vehicles/day
Location
| State | Colorado |
| County | Boulder |
| Location | 0.4 Mi N Of Niwot RD |
| Carries | N 63rd ST (cr 39) |
| Crosses | Lefthand Creek |
| Coordinates | 40.10742, -105.20686 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete Continuous |
| Design | Box Beam - Single/Spread |
| Total Length | 125.0 ft (38.1 m) |
| Max Span | 57.4 ft (17.5 m) |
| Deck Width | 38.1 ft (11.6 m) |
| Deck Area | 442.0 sq m |
| Main Spans | 2 |
| Year Built | 2011 |
Traffic
| Avg Daily Traffic | 2,610 (2021) |
| Truck Traffic | 11% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 225 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | BC-39-4.8-LTA |