Mosquito Lk RD over Middle Fork
Fair Condition111 years old117 vehicles/day
Location
| State | Washington |
| County | Whatcom |
| Location | 05.2 SE Mt. Baker HWY |
| Carries | Mosquito Lk RD |
| Crosses | Middle Fork |
| Coordinates | 48.78462, -122.11314 |
Condition Ratings
| Overall Condition | Fair |
| Deck | 8 (Very Good) |
| Superstructure | 6 (Satisfactory) |
| Substructure | 7 (Good) |
| Channel/Waterway | 8 (Very Good) |
| Scour Critical | 7 — Countermeasures installed |
Physical Characteristics
| Material | Steel |
| Design | Truss - Thru |
| Total Length | 431.1 ft (131.4 m) |
| Max Span | 337.9 ft (103 m) |
| Deck Width | 16.1 ft (4.9 m) |
| Deck Area | 643.9 sq m |
| Main Spans | 1 |
| Year Built | 1915 (reconstructed 2010) |
Traffic
| Avg Daily Traffic | 117 (2024) |
| Truck Traffic | 4% |
| Lanes On Bridge | 1 |
Inspection & Ownership
| Last Inspection | 824 |
| Inspection Frequency | Every 24 months |
| Owner | County Highway Agency |
| Historical Significance | Bridge is on the National Register of Historic Places |
| Structure Number | 081574000000000 |