Road Stream Crossing Site AUS_CR090

Au Sable River Watershed, East Branch Big Creek
Walsh Rd
Lovells Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.73913 , -84.37986
T27N R01W Sec 13
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 53.9869 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Pipe Arch,Open Bottom Arch
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 33 ft. , Width 23 ft. , Height 6.6 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.04 ft./sec.
Structure Outlet
Water Depth: 2.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.22 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 22 ft. , Width 23 ft. , Depth 3.5 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 1.3 ft.
Bankfull Width: 30 ft.
Wetted Width: 25 ft.
Water Velocity: 1.54 ft./sec. (Measured with Float Test)
Dominant Substrate: Cobble
Road Information
Gravel County Road
Road Condition: Good
Road Width at Culvert: 25 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Left Approach
Length: 1000 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 5.785
Erosion: 39.8416 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 14.1185 tons/year
Erosion Information
Total Erosion at Crossing: 53.9869 tons/year
Extent of Erosion: Minor
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Left Upstream
20 ft.
5 ft.
0.8 ft.
Right Downstream
14 ft.
8 ft.
0.6 ft.
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. See if scour pool is increasing in size and spot if any erosion is occuring.
These non-native species were observerd at this site: Spotted Knapweed, Mullein