Road Stream Crossing Site AUS_OS012
Au Sable River Watershed, Tributary of East Branch of Big Creek
Griffin Rd
Greenwood Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.7393
, -84.34927
T27N
R01E
Sec 17
Owned by Private
Fish Passability 0
Perch Height: 0.1 ft.
Total Erosion: 17.1127 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)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: New
Structure Interior: corrugated
Dimensions of Structure: Length 38 ft.
, Width 2 ft.
, Height 2 ft.
Perch Height: 0.1 ft.
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 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 12 ft.
, Width 13 ft.
, Depth 1.7 ft.
Upstream Pond: Length 13 ft.
, Width 43 ft.
, Depth 2.3 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 11 ft.
Wetted Width: 3 ft.
Water Velocity: 0 ft./sec.
(Measured with Float Test)
Dominant Substrate: Organics
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 17.4 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 387 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 3.928
Erosion: 7.2862 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 9.8264 tons/year
Erosion Information
Total Erosion at Crossing: 17.1127 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site.
Alignment is an issue
A future visit to this site is recommended. Realignment can be done to allow adequate flow passage.
These non-native species were observerd at this site: Bull Thistle, Canada Thistle, Ox-Eye Daisy, Yellow Sweet Clover, St. Johnswort, Mullein, Purple Vetch, Spotted Knapweed, Queen Anne's Lace