Road Stream Crossing Site AUS_CR053

Au Sable River Watershed, Tributary of Au Sable River
Wakely Bridge Rd
Grayling Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.66146 , -84.50713
T26N R02W Sec 12
Owned by Private
Fish Passability 0
Total Erosion: 3.1134 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Outlet Apron
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 62.5 ft. , Width 1.6 ft. , Height 1.6 ft.
Structure Inlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 11 ft. , Width 9 ft. , Depth 1.1 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 9 ft.
Wetted Width: 4.3 ft.
Water Velocity: 2.1 ft./sec. (Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 31.3 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 2.2 ft.
Slope: More than 1:2
Fill Depth: 3 ft.
Slope: More than 1:2
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0 tons/year
Right Approach
Length: 970 ft.
Slope: 6% to 10%
Vegetation: Partial
LS Factor: 3.102
Erosion: 3.1134 tons/year
Erosion Information
Total Erosion at Crossing: 3.1134 tons/year
Extent of Erosion: Minor
Notes: Above right upstream approach.
Summary Information
Fish Passability 0
A future visit to this site is recommended. Upstream side culvert makes a connection to a ditch culvert that is completely rusted through.