Road Stream Crossing Site AUS_OS036
Au Sable River Watershed, West Branch Big Creek
Old 144 (County 490)
Big Creek Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.66023
, -84.06622
T25N
R01E
Sec 4
Owned by Federal
Fish Passability 0.9
Total Erosion: 0.873 tons/year
Severity: Moderate
Year Inventoried: 2013
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Inlet Type: Wingwall 30-70 Degree
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: Mixture
General Conditions: Good
Dimensions of Structure: Length 33.6 ft.
, Width 29 ft.
, Height 8.1 ft.
Structure Inlet
Water Depth: 1.6 ft.
Water Velocity*: 0.51 ft./sec.
Structure Outlet
Water Depth: 2 ft.
Water Velocity*: 0.45 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 81 ft.
Wetted Width: 24.8 ft.
Water Velocity: 1.187 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
Federal Road
Road Condition: Good
Road Width at Culvert: 30.6 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Slope: Vertical
Slope: Vertical
Approaches
Left Approach
Length: 570 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.514
Erosion: 0.2964 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.5766 tons/year
Erosion Information
Total Erosion at Crossing: 0.873 tons/year
Summary Information
Fish Passability 0.9
These non-native species were observerd at this site: Queen Anne's Lace, Spotted Knapweed