Road Stream Crossing Site AUS_CR082

Au Sable River Watershed, North Branch Au Sable River
County Rd 612
Lovells Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.80388 , -84.48199
T28N R01W Sec 19
Owned by Private
Fish Passability 0
Total Erosion: 1.0877 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Rock
General Conditions: Poor
Structure Interior: smooth
Structure is Rusted through
Dimensions of Structure: Length 42.5 ft. , Width 46 ft. , Height 9.6 ft.
Structure Inlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.7 ft./sec.
Structure Outlet
Water Depth: 1.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.4 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 1.4 ft.
Bankfull Width: 104 ft.
Wetted Width: 93 ft.
Water Velocity: 3.81 ft./sec. (Measured with Float Test)
Dominant Substrate: Cobble
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 26 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0 tons/year
Right Approach
Length: 510 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.644
Erosion: 0.2823 tons/year
Erosion Information
Total Erosion at Crossing: 1.0877 tons/year
Extent of Erosion: Moderate
Notes: Located along downstream bank/man- made walkway on upstream side, man-made drive on downstream side.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Right Downstream
17 ft.
11 ft.
1 ft.
Left Ditch
38 ft.
6 ft.
2 ft.
Gravelly Loam
Right Ditch
82 ft.
15 ft.
0.3 ft.
Summary Information
Fish Passability 0
A future visit to this site is recommended. to remove LWD causing a scour pool on downstream side, rusted out metal parts/splitting concrete columns undre bridge.
These non-native species were observerd at this site: Spotted Knapweed