Road Stream Crossing Site AUS_OS140
Au Sable River Watershed, East Branch Big Creek
Red Oak Rd (County 489)
Greenwood Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.77637
, -84.31248
T28N
R01E
Sec 34
Owned by State
Fish Passability 0
Perch Height: 0.4 ft.
Total Erosion: 1.2813 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)
Structure Shape: Ellipse
Inlet Type: Trash Rack
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 118 ft.
, Width 6.5 ft.
, Height 4.4 ft.
Percentage Plugged:
Inlet: 51% to 75%
Perch Height: 0.4 ft.
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.963 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.381 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 17 ft.
, Width 12 ft.
, Depth 2 ft.
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 16 ft.
Wetted Width: 11 ft.
Water Velocity: 1.825 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 34 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 10 ft.
Slope: 1:2
Downstream
Fill Depth: 10 ft.
Slope: 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.6407 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.6407 tons/year
Erosion Information
Total Erosion at Crossing: 1.2813 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site.
Culvert is plugged at inlet, and outlet is perched and a scour pool exists. Plus, no substrate in culvert.
A future visit to this site is recommended. To realign culvert and treat invasives.
These non-native species were observerd at this site: Oxeye Daisy, Spotted Knapweed, Leafy Spurge, White Sweet Clover, Queen Anne's Lace