Road Stream Crossing Site AUS_CR114

Au Sable River Watershed, Kolka Creek
Unnamed Two Track off Kolka Rd
Frederic Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.81936 , -84.76665
T28N R04W Sec 14
Owned by Private
Fish Passability 0.9
Total Erosion: 0.1858 tons/year
Severity: Moderate
Year Inventoried: 2013
Upstream Conditions
Upstream Conditions
Downstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Ford
Inlet Type: Other
Outlet Type: Cascade over Riprap
Structure Substrate: Rock
General Conditions: Good
Dimensions of Structure: Length 12 ft. , Width 22 ft.
Structure Inlet
Water Depth: 1.3 ft.
Water Velocity*: 1.3 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Water Velocity*: 1.78 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 ft.
Bankfull Width: 24 ft.
Wetted Width: 21.5 ft.
Water Velocity: 0.6 ft./sec. (Measured with Float Test)
Dominant Substrate: Sand
Road Information
Gravel County Road
Road Condition: Poor
Road Width at Culvert: 8.2 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Fill Depth: 0 ft.
Fill Depth: 0 ft.
Left Approach
Length: 17.5 ft.
Slope: More Than 10%
Vegetation: Partial
LS Factor: 0.869
Erosion: 0.0343 tons/year
Right Approach
Length: 18.5 ft.
Slope: More Than 10%
Vegetation: Partial
LS Factor: 0.896
Erosion: 0.0375 tons/year
Erosion Information
Total Erosion at Crossing: 0.1858 tons/year
Extent of Erosion: Moderate
Notes: From gravel road entering into stream via ford.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Right Downstream
19.7 ft.
19 ft.
0.5 ft.
Left Downstream
19.5 ft.
10.2 ft.
0.3 ft.
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Trail should be closed. Ford isn't used very much and is contributing to a lot of gravel entering the stream.
These non-native species were observerd at this site: Spotted Knapweed, Burdock