Road Stream Crossing Site AUS_PR002

Au Sable River Watershed, Van Etten Creek
Clemens Rd
Harrisville, alcona County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.63467 , -83.37248
T26N R09E Sec 20
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 0.7418 tons/year
Severity: Moderate
Year Inventoried: 2012
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: Ellipse
Inlet Type: Mitered
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 41 ft. , Width 8 ft. , Height 6 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 40 ft. , Width 35 ft. , Depth 2.5 ft.
Upstream Pond: Length 12 ft. , Width 10 ft. , Depth 2 ft.
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 20 ft.
Wetted Width: 10 ft.
Water Velocity: 0.3 ft./sec. (Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 23 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1 ft.
Slope: More than 1:2
Downstream
Fill Depth: 0.8 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.4334 tons/year
Right Approach
Length: 748 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.542
Erosion: 0.3084 tons/year
Erosion Information
Total Erosion at Crossing: 0.7418 tons/year
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Yes, to better evaluate the effects of the cow pasture on the stream because we couldn't measure the erosion there. The culvert itself was okay.
These non-native species were observerd at this site: Sweet Clover, Spotted Knapweed