Road Stream Crossing Site AUS_CR088
Au Sable River Watershed, Middle Branch Big Creek
Williams Rd
Lovells Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.8217
, -84.33828
T28N
R01W
Sec 13
Owned by State
Fish Passability 1
Structure is NOT Perched
Total Erosion: 9.7647 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: Gravel
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 15.1 ft.
, Width 23.2 ft.
, Height 4 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.67 ft./sec.
Structure Outlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.48 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 17 ft.
Wetted Width: 12.5 ft.
Water Velocity: 2.2 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Sand
County Road
Road Condition: Fair
Road Width at Culvert: 11.5 ft.
Location of Low Point: Other
Runoff Path: Roadway
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Right Approach
Length: 640 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 4.816
Erosion: 9.7647 tons/year
Erosion Information
Total Erosion at Crossing: 9.7647 tons/year
Extent of Erosion: Minor
Notes: Due to cracks on road to stream bed.
Summary Information
Fish Passability 1
These non-native species were observerd at this site: Spotted Knapweed