Road Stream Crossing Site AUS_OS060
Au Sable River Watershed, Big Creek
Randall Rd (County 489)
Big Creek Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.63755
, -84.26105
T26N
R01E
Sec 13,24
Owned by Private
Total Erosion: 2.8082 tons/year
Severity: Severe
Year Inventoried: 2013
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Dimensions of Structure: Length 42.3 ft.
, Width 35 ft.
, Height 10.8 ft.
Structure Inlet
Water Depth: 2 ft.
Water Velocity*: 2.4 ft./sec.
Structure Outlet
Water Depth: 2.8 ft.
Water Velocity*: 2.86 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Additional Comments
No access to riffle without canoe
Stream Information
Stream Flow: Less than 1/2 Bankfull
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 32.3 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.7 ft.
Slope: Vertical
Downstream
Fill Depth: 1.7 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.6086 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 2.1889 tons/year
Erosion Information
Total Erosion at Crossing: 2.8082 tons/year
Extent of Erosion: Minor
Notes: erosion site (access path-foot traffic)-would watch for increasing erosion.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Downstream Streambank |
24 ft. |
3 ft. |
0.4 ft. |
yes |
Sand |
0.0106 |
Summary Information
These non-native species were observerd at this site: Spotted Knapweed, Queen Anne's Lace, White Sweet grass