Road Stream Crossing Site AUS_CR069

Au Sable River Watershed, Hickey Creek
Old 144 (County 490)
South Branch Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.54034 , -84.46138
T25N R01W Sec 20
Owned by Federal
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 16.1932 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Ellipse
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Gravel
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 30.2 ft. , Width 2.9 ft. , Height 1.7 ft.
Percentage Crushed: Inlet: 0% Outlet: 0% In Pipe: 1% to 25%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.597 ft./sec.
Structure Outlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.968 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 2 ft. , Width 6.5 ft. , Depth 0.8 ft.
Upstream Pond: Length 33 ft. , Width 36 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 12 ft.
Wetted Width: 3.2 ft.
Water Velocity: 1.304 ft./sec. (Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Sand County Road
Road Condition: Fair
Road Width at Culvert: 22 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Fill Depth: 2 ft.
Slope: 1:1.5
Fill Depth: 2 ft.
Slope: 1:2
Left Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 12.4242 tons/year
Right Approach
Length: 405 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.535
Erosion: 3.7683 tons/year
Erosion Information
Total Erosion at Crossing: 16.1932 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Reduce embankment slope and revegetate to help issue.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Right Upstream
2 ft.
31 ft.
0.3 ft.
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Eventually, because culvert is not in the best overall condition
These non-native species were observerd at this site: Spotted Knapweed