US Highway 101 NB over Mad River

Fair Condition14 years old16,500 vehicles/day

Location

StateCalifornia
CountyHumboldt
Location01-hum-101-89.63
CarriesUS Highway 101 NB
CrossesMad River
Coordinates40.91563, -124.09243

Condition Ratings

Overall ConditionFair
Deck5 (Fair)
Superstructure7 (Good)
Substructure7 (Good)
Channel/Waterway9 (Excellent)
Scour Critical8 — Stable, low risk

Physical Characteristics

MaterialPrestressed Concrete Continuous
DesignBox Beam - Multiple
Total Length750.0 ft (228.6 m)
Max Span225.1 ft (68.6 m)
Deck Width51.2 ft (15.6 m)
Deck Area3566.2 sq m
Main Spans4
Year Built2012

Traffic

Avg Daily Traffic16,500 (2009)
Lanes On Bridge3

Inspection & Ownership

Last InspectionNovember 2023
Inspection FrequencyEvery 24 months
OwnerState Highway Agency
Historical SignificanceBridge is not eligible for the National Register
Structure Number04 0311R

Nearby Bridges

US Highway 101 SB over Mad River 0.0 mi Good U.s. Highway 101 over Boyd Draw 0.2 mi Fair U.s. Highway 101 over Turner Draw 0.4 mi Fair SR 200 (central) over US Highway 101 0.5 mi Good U.s. Highway 101 over Jones Slough 0.8 mi Fair Guintoli Lane over US Highway 101 0.8 mi Fair Guintoli Lane over State Route 299 1.3 mi Good State Route 299 over US Highway 101 1.4 mi Good State Route 299 over Mad River 1.6 mi Poor State Route 299 over Mad River 1.6 mi Good