Road Stream Crossing Site AUS_CR057

Au Sable River Watershed, Au Sable River
Wakely Bridge Rd
Grayling Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.66 , -84.5072
T26N R02W Sec 12
Owned by Private
Fish Passability 0
Structure is NOT Perched
Total Erosion: 9.1399 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 3
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Other
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Gravel
General Conditions: Fair
Multiple Culverts/Spans
37 ft.
34 ft.
9.7 ft.
37 ft.
34 ft.
9.6 ft.
Structure Interior: smooth
Dimensions of Structure: Length 34 ft. , Width 33.5 ft. , Height 10 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 3.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.48 ft./sec.
Structure Outlet
Water Depth: 3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.3 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 2.2 ft.
Bankfull Width: 73.5 ft.
Wetted Width: 68 ft.
Water Velocity: 4 ft./sec. (Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 30.5 ft.
Location of Low Point: Other
Runoff Path: Ditch
Slope: Vertical
Slope: Vertical
Left Approach
Length: 1000 ft.
Slope: More Than 10%
Vegetation: Partial
LS Factor: 9.065
Erosion: 9.1399 tons/year
Right Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 9.1399 tons/year
Extent of Erosion: Minor
Notes: Minor erosion from bridge/road stream crossing.
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site. Extremely high water velocity at inlet
A future visit to this site is recommended. To check velocity of water/any fish passage problems.