Road Stream Crossing Site AUS_OS020

Au Sable River Watershed, Beaver Creek
County Rd 489
Greenwood Twp, Oscoda County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.7083 , -84.2925
T27N R01E Sec 26,27
Owned by Private
Fish Passability 0
Structure is NOT Perched
Total Erosion: 6.1615 tons/year
Severity: Severe
Year Inventoried: 2013
Inlet
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: Concrete
Structure Substrate: None
General Conditions: Poor
Structure Interior: smooth
Dimensions of Structure: Length 122 ft. , Width 3.5 ft. , Height 3.5 ft.
Percentage Plugged: Inlet: 51% to 75% Outlet: 0% In Pipe: 0%
Percentage Crushed: Inlet: 51% to 75% Outlet: 0% In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.947 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 5 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 28 ft. , Width 22 ft. , Depth 2 ft.
Riffle Information
Water Depth: 0.9 ft.
Bankfull Width: 11 ft.
Wetted Width: 6.5 ft.
Water Velocity: 1.935 ft./sec. (Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 32 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 25 ft.
Slope: 1:2
Downstream
Fill Depth: 25 ft.
Slope: 1:2
Approaches
Left Approach
Length: 50 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 0.79
Erosion: 0.0418 tons/year
Right Approach
Length: 1000 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 5.785
Erosion: 6.1197 tons/year
Erosion Information
Total Erosion at Crossing: 6.1615 tons/year
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site. Extremely high water velocities at inlet and outlet. Crushed inlet and plugged trash rack
A future visit to this site is recommended. See above
These non-native species were observerd at this site: Spotted Knapweed, Canadian Thistle

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