Road Stream Crossing Site AUS_RO034
Au Sable River Watershed, South Creek
F-97
AuSable Twp,
Roscommon County
Information collected by:
Site Location
GPS Coordinates: 44.43084
, -84.41044
T24N
R01W
Sec 35
Owned by State
Fish Passability 0.5
Total Erosion: 1.124 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Ellipse
Inlet Type: Apron
Outlet Type: Outlet Apron
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 50 ft.
, Width 3.1 ft.
, Height 2.4 ft.
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.298 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 10 ft.
, Width 7 ft.
, Depth 0.6 ft.
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 7 ft.
Wetted Width: 4 ft.
Water Velocity: 1.071 ft./sec.
(Measured with Float Test)
Dominant Substrate: Silt
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 36 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.8 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: 1:2
Approaches
Left Approach
Length: 700 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.535
Erosion: 0.4457 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.6783 tons/year
Erosion Information
Total Erosion at Crossing: 1.124 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Minor erosion along streambank
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. To remove the canada thistle. There are lots of it.
These non-native species were observerd at this site: Canada Thistle, Spotted Knapweed