Road Stream Crossing Site AUS_CR043

Au Sable River Watershed, Tributary of Au Sable River
North Down River Rd
Grayling Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.68449 , -84.67013
T26N R03W Sec 4
Owned by Private
Fish Passability 0.5
Total Erosion: 0.3061 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: Other
Structure Shape: Round
Inlet Type: Apron
Outlet Type: Outlet Apron
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 59 ft. , Width 1.6 ft. , Height 1.6 ft.
Structure Inlet
Water Depth: 0.3 ft.
Water Velocity*: 0.49 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 14 ft. , Width 19 ft. , Depth 0.8 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 19 ft.
Wetted Width: 15.5 ft.
Water Velocity: 0.3 ft./sec. (Measured with Float Test)
Dominant Substrate: Organics
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 42 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 2.1 ft.
Slope: More than 1:2
Fill Depth: 2 ft.
Slope: More than 1:2
Length: 0 ft.
Slope: 0%
Vegetation: Heavy
LS Factor: 0
Erosion: 0 tons/year
Right Approach
Length: 450 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.49
Erosion: 0.3061 tons/year
Erosion Information
Total Erosion at Crossing: 0.3061 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0.5