Road Stream Crossing Site AUS_CR026

Au Sable River Watershed, Tributary of East Branch Au Sable River
M-93
Grayling Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.73576 , -84.66634
T27N R03W Sec 16
Owned by State
Fish Passability 0
Total Erosion: 0.2588 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Other
Structure Shape: Ellipse
Inlet Type: Apron
Outlet Type: Outlet Apron
Structure Material: Concrete
Structure Substrate: mixture
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 74 ft. , Width 2.2 ft. , Height 1.1 ft.
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 0 ft./sec.
Water Depth: 0 ft.
Embedded Depth of Structure: 1.6 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Additional Comments
Hartwick Pines
Stream Information
Stream Flow: Less than 1/2 Bankfull
Upstream Pond: Length 18 ft. , Width 7 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 10 ft.
Wetted Width: 7 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: 42 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 4 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 390 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.478
Erosion: 0.2588 tons/year
Length: 0 ft.
Slope: 0%
Vegetation: Heavy
LS Factor: 0
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.2588 tons/year
Extent of Erosion: Minor
Notes: Some gravel erosion from road shoulder.
Summary Information
Fish Passability 0
A future visit to this site is recommended. 100% blocked culvert
These non-native species were observerd at this site: Spotted Knapweed