Road Stream Crossing Site AUS_OS059
Au Sable River Watershed, East Branch Big Creek
M-72
Big Creek Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.61621
, -84.26728
T26N
R01E
Sec 25
Owned by Private
Fish Passability 0.5
Total Erosion: 3.7676 tons/year
Severity: Severe
Year Inventoried: 2013
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Inlet Type: Other
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Good
Dimensions of Structure: Length 27.5 ft.
, Width 123 ft.
, Height 30.7 ft.
Structure Inlet
Water Depth: 2.7 ft.
Water Velocity*: 1.39 ft./sec.
Structure Outlet
Water Depth: 4.5 ft.
Water Velocity*: 2.9 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 31 ft.
, Width 18 ft.
, Depth 4 ft.
Riffle Information
Water Depth: 1.4 ft.
Bankfull Width: 60 ft.
Wetted Width: 30 ft.
Water Velocity: 1.62 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
State Road
Road Condition: Good
Road Width at Culvert: 43.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Slope: Vertical
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.8197 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 2.9479 tons/year
Erosion Information
Total Erosion at Crossing: 3.7676 tons/year
Summary Information
Fish Passability 0.5
These non-native species were observerd at this site: Queen Anne's Lace