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:
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
Inlet
Inlet
Outlet
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.
Approaches
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 | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Downstream |
19.7 ft. |
19 ft. |
0.5 ft. |
yes |
Gravel |
0.069 |
Left Downstream |
19.5 ft. |
10.2 ft. |
0.3 ft. |
yes |
Sand |
0.045 |
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