Road Stream Crossing Site AUS_OS123
Au Sable River Watershed, Tributary of Cauchy Creek
Cauchy Creek Rd
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.6309
, -84.088433
T26N
R03E
Sec 21
Perch Height: 3 ft.
Total Erosion: 5.4747 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: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: Gravel
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 74 ft.
, Width 1.5 ft.
, Height 1.5 ft.
Perch Height: 3 ft.
Structure Inlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.5 ft./sec.
Structure Outlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.5 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 20 ft.
, Width 11 ft.
, Depth 3.5 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 75 ft.
Wetted Width: 3 ft.
Water Velocity: 0.6 ft./sec.
(Measured with Float Test)
Dominant Substrate: Bedrock
Road Information
Sand
County Road
Road Condition: Good
Road Width at Culvert: 29 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 15 ft.
Slope: 1:1.5
Downstream
Fill Depth: 12 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 490 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.498
Erosion: 1.9495 tons/year
Right Approach
Length: 802 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.55
Erosion: 3.5252 tons/year
Erosion Information
Total Erosion at Crossing: 5.4747 tons/year
Extent of Erosion: Moderate
Notes:
None noted
Summary Information
Fish Passage is an area of concern for this site.
due to perch height
A future visit to this site is recommended.
to check fish passage problems