Road Stream Crossing Site AUS_CR024

Au Sable River Watershed, Tributary of East Branch Au Sable River
Grayling Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.73597 , -84.6618
T27N R03W Sec 15
Owned by State
Fish Passability 0.9
Total Erosion: 0.9886 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: Other
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Apron
Outlet Type: Other
Structure Material: Concrete
Structure Substrate: mixture
General Conditions: Poor
Structure Interior: smooth
Dimensions of Structure: Length 73 ft. , Width 2.2 ft. , Height 1.5 ft.
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 11 ft.
Wetted Width: 4 ft.
Water Velocity: 0 ft./sec. (Measured with Float Test)
Dominant Substrate: Organics
Road Information
Paved State Road
Road Condition: Good
Road Width at Culvert: 46 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 2 ft.
Slope: More than 1:2
Fill Depth: 5 ft.
Slope: More than 1:2
Left Approach
Length: 850 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.763
Erosion: 0.9856 tons/year
Length: 0 ft.
Slope: 0%
Vegetation: Partial
LS Factor: 0
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.9886 tons/year
Extent of Erosion: Minor
Notes: Some gravel erosion onto embankments from road shoulder.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Left Approach
15 ft.
76 ft.
0.2 ft.
Summary Information
Fish Passability 0.9
These non-native species were observerd at this site: Spotted Knapweed