IRR Co RD 87 over Mamath Slough
Good Condition71 years old255 vehicles/day
Location
| State | California |
| County | Modoc |
| Location | 0.5 Mi NE CR 91 |
| Carries | IRR Co RD 87 |
| Crosses | Mamath Slough |
| Coordinates | 41.21318, -121.13624 |
Condition Ratings
| Overall Condition | Good |
| Deck | 7 (Good) |
| Superstructure | 7 (Good) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 8 — Stable, low risk |
Physical Characteristics
| Material | Concrete |
| Design | Slab |
| Total Length | 23.0 ft (7 m) |
| Max Span | 20.0 ft (6.1 m) |
| Deck Width | 28.9 ft (8.8 m) |
| Deck Area | 61.6 sq m |
| Main Spans | 1 |
| Year Built | 1955 |
Traffic
| Avg Daily Traffic | 255 (2006) |
| Truck Traffic | 10% |
| Lanes On Bridge | 2 |
Inspection & Ownership
| Last Inspection | 423 |
| Inspection Frequency | Every 48 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is not eligible for the National Register |
| Structure Number | 03C0071 |