Road Stream Crossing Site AUS_OS125
Au Sable River Watershed, Tributary of Cauchy Creek
Cauchy Creek Rd
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.630833
, -84.09493
T26N
R03E
Sec 21
Structure is NOT Perched
Total Erosion: 6.292 tons/year
Severity: Severe
Year Inventoried: 2013
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Trash Rack
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Poor
Structure Interior: corrugated
Dimensions of Structure: Length 67 ft.
, Width 2 ft.
, Height 2 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0.65 ft.
Water Velocity*: 0.2 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 15 ft.
, Width 9 ft.
, Depth 1.5 ft.
Upstream Pond: Length 12 ft.
, Width 15 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 100 ft.
Wetted Width: 2 ft.
Water Velocity: 1.5 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Sand
County Road
Road Condition: Good
Road Width at Culvert: 28 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 5 ft.
Slope: More than 1:2
Downstream
Fill Depth: 4 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 492 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.498
Erosion: 1.8914 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 4.3967 tons/year
Erosion Information
Total Erosion at Crossing: 6.292 tons/year
Extent of Erosion: Moderate
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Upstream Streambank |
5 ft. |
10 ft. |
0.1 ft. |
yes |
Sand |
0.0039 |
Summary Information
Erosion is an area of concern for this site.