SH 21 over Canyon Creek
Good Condition62 years old620 vehicles/day
Location
| State | Idaho |
| County | Boise |
| Location | 28 Ne. Lowman |
| Carries | SH 21 |
| Crosses | Canyon Creek |
| Coordinates | 44.24488, -115.21216 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 8 (Very Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Tee Beam |
| Total Length | 115.2 ft (35.1 m) |
| Max Span | 75.1 ft (22.9 m) |
| Deck Width | 30.8 ft (9.4 m) |
| Deck Area | 329.9 sq m |
| Main Spans | 3 |
| Year Built | 1964 |
Traffic
| Avg Daily Traffic | 620 (2023) |
| Truck Traffic | 22% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | October 2024 |
| Inspection Frequency | Every 48 months |
| Owner | State Highway Agency |
| Historical Significance | Historical significance is not determined |
| Structure Number | 000000000012930 |