Road Stream Crossing Site AUS_CR019

Au Sable River Watershed, Tributary of East Branch Au Sable River
Scenic Trail
Grayling Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.7402 , -84.63427
T27N R03W Sec 14
Owned by State
Fish Passability 0.9
Total Erosion: 0.197 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: Good
Multiple Culverts/Spans
1.1 ft.
20 ft.
1.1 ft.
Structure Interior: corrugated
Dimensions of Structure: Length 20.5 ft. , Width 1.7 ft. , Height 1.6 ft.
Structure Inlet
Water Depth: 1.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.17 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.35 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Upstream Pond: Length 100 ft. , Width 100 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 61 ft.
Wetted Width: 49 ft.
Water Velocity: 2.3 ft./sec. (Measured with Float Test)
Dominant Substrate: Organics
Road Information
Gravel County Road
Road Condition: Good
Road Width at Culvert: 12.9 ft.
Location of Low Point: Other
Runoff Path: Roadway
Fill Depth: 1 ft.
Slope: 1:1.5
Fill Depth: 1 ft.
Slope: More than 1:2
Left Approach
Length: 140 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.396
Erosion: 0.197 tons/year
Length: 0 ft.
Slope: 0%
Vegetation: Heavy
LS Factor: 0
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.197 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0.9