Road Stream Crossing Site AUS_CR084
Au Sable River Watershed, West Branch Big Creek
County Rd 612
Lovells Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.84137
, -84.43638
T28N
R01W
Sec 9
Owned by Private
State
State
Fish Passability 0
Structure is NOT Perched
Total Erosion: 1.5104 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: Cascade over Riprap
Structure Material: Wood
Structure Substrate: Rock
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 32.5 ft.
, Width 31.2 ft.
, Height 15.2 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.54 ft./sec.
Structure Outlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 5.33 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 23 ft.
, Width 22 ft.
, Depth 1.5 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 36 ft.
Wetted Width: 26 ft.
Water Velocity: 3.08 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Poor
Road Width at Culvert: 28 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.8
Erosion: 0.7405 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.8
Erosion: 0.7405 tons/year
Erosion Information
Total Erosion at Crossing: 1.5104 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Downstream |
30 ft. |
3.5 ft. |
0.5 ft. |
no |
Gravel |
0.015 |
Left Ditch |
10 ft. |
1.8 ft. |
1.5 ft. |
no |
Sandy Loam |
0.0144 |
Summary Information
Fish Passability 0
These non-native species were observerd at this site: Spotted Knapweed, Queen Anne's Lace, Mullein