Road Stream Crossing Site AUS_CR024
Au Sable River Watershed, Tributary of East Branch Au Sable River
M-93
Grayling Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.73597
, -84.6618
T27N
R03W
Sec 15
Owned by State
Fish Passability 0.9
Total Erosion: 0.9886 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: Other
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Apron
Outlet Type: Other
Structure Material: Concrete
Structure Substrate: mixture
General Conditions: Poor
Structure Interior: smooth
Dimensions of Structure: Length 73 ft.
, Width 2.2 ft.
, Height 1.5 ft.
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 11 ft.
Wetted Width: 4 ft.
Water Velocity: 0 ft./sec.
(Measured with Float Test)
Dominant Substrate: Organics
Road Information
Paved
State Road
Road Condition: Good
Road Width at Culvert: 46 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 5 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 850 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.763
Erosion: 0.9856 tons/year
Length: 0 ft.
Slope: 0%
Vegetation: Partial
LS Factor: 0
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.9886 tons/year
Extent of Erosion: Minor
Notes: Some gravel erosion onto embankments from road shoulder.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Approach |
15 ft. |
76 ft. |
0.2 ft. |
no |
Gravel |
0.003 |
Summary Information
Fish Passability 0.9
These non-native species were observerd at this site: Spotted Knapweed