Road Stream Crossing Site CLHW_BC-032
Big Creek Watershed, Unnamed Drain to Big Creek
S Crawford Rd
Au Gres,
Arenac County
Information collected by:
Site Location
GPS Coordinates: 44.05937
, -83.78633
T19N
R6E
Sec 7
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 3.219 tons/year
Severity: Severe
Year Inventoried: 2016
Site ID
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: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 42 ft.
, Width 6.5 ft.
, Height 5 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.9 ft./sec.
Structure Outlet
Water Depth: 1.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.9 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 43.5 ft.
, Width 19 ft.
, Depth 2.8 ft.
Upstream Pond: Length 1.8 ft.
, Width 16 ft.
, Depth 13 ft.
Riffle Information
Water Depth: 0.9 ft.
Bankfull Width: 33 ft.
Wetted Width: 9 ft.
Water Velocity: 0.7 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Gravel
County Road
Road Condition: Poor
Road Width at Culvert: 20.5 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.3 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2.5 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 3.219 tons/year
Erosion Information
Total Erosion at Crossing: 3.219 tons/year
Extent of Erosion: Very Severe
Notes: Severe Erosion along all banks
Summary Information
Fish Passability 0.5
These non-native species were observerd at this site: Garlic Mustard