Marshall RD (cr 51 over South Boulder Creek
Fair Condition38 years old318 vehicles/day
Location
| State | Colorado |
| County | Boulder |
| Location | 0.5 Mi N Of ST HWY 170 |
| Carries | Marshall RD (cr 51 |
| Crosses | South Boulder Creek |
| Coordinates | 39.96002, -105.23228 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 6 (Satisfactory) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 7 (Good) |
| Scour Critical | 5 — Stable for scour |
Physical Characteristics
| Material | Wood or Timber |
| Design | Slab |
| Total Length | 38.1 ft (11.6 m) |
| Max Span | 36.1 ft (11 m) |
| Deck Width | 30.2 ft (9.2 m) |
| Deck Area | 106.7 sq m |
| Main Spans | 1 |
| Year Built | 1988 |
Traffic
| Avg Daily Traffic | 318 (2022) |
| Truck Traffic | 4% |
| 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-51-11.0-SB1 |