Nelson RD (cr 20) over Boulder Feeder Ditch
Fair Condition76 years old2,692 vehicles/day
Location
| State | Colorado |
| County | Boulder |
| Location | 1.0 Mi W Of Co RD 39 |
| Carries | Nelson RD (cr 20) |
| Crosses | Boulder Feeder Ditch |
| Coordinates | 40.15230, -105.22515 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Prestressed Concrete |
| Design | Tee Beam |
| Total Length | 32.2 ft (9.8 m) |
| Max Span | 29.5 ft (9 m) |
| Deck Width | 28.9 ft (8.8 m) |
| Deck Area | 86.2 sq m |
| Main Spans | 1 |
| Year Built | 1950 (reconstructed 1981) |
Traffic
| Avg Daily Traffic | 2,692 (2023) |
| Truck Traffic | 16% |
| 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-20-3.3-ID |