Road Stream Crossing Site AUS_OS119
Au Sable River Watershed, Loud Creek
Cauchy Creek Rd
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.63078
, -84.0982
T26N
R03E
Sec 20
Perch Height: 2 ft.
Total Erosion: 6.0992 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: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
2 |
2 ft. |
70 ft. |
2 ft. |
Metal |
Structure Interior: corrugated
Dimensions of Structure: Length 73 ft.
, Width 1.5 ft.
, Height 1.5 ft.
Perch Height: 2 ft.
Structure Inlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.9 ft.
Water Velocity*: 0.5 ft./sec.
Structure Outlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.6 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 18 ft.
, Width 20 ft.
, Depth 2.9 ft.
Upstream Pond: Length 30 ft.
, Width 15 ft.
Riffle Information
Water Depth: 0.4 ft.
Bankfull Width: 28 ft.
Wetted Width: 19 ft.
Water Velocity: 0.5 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 27 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 9 ft.
Slope: 1:1.5
Downstream
Fill Depth: 8 ft.
Slope: 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 4.2397 tons/year
Right Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.5
Erosion: 1.8595 tons/year
Erosion Information
Total Erosion at Crossing: 6.0992 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.