Road Stream Crossing Site CLHW_MC-010
Mill Creek Watershed, Unnamed
N Old Mackinaw
Mackinaw Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.73826
, -84.65225
T39N
R3W
Sec 27
Owned by Private
Fish Passability 0
Structure is NOT Perched
Total Erosion: 4.9901 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: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Rock
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 45 ft.
, Width 9 ft.
, Height 4.6 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 3.4 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 3.4 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 1.4 ft.
Bankfull Width: 16 ft.
Wetted Width: 14 ft.
Water Velocity: 2.5 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Gravel
County Road
Road Condition: Fair
Road Width at Culvert: 16 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3 ft.
Slope: More than 1:2
Downstream
Fill Depth: 4 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 300 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.4
Erosion: 1.8512 tons/year
Right Approach
Length: 450 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.583
Erosion: 3.1388 tons/year
Erosion Information
Total Erosion at Crossing: 4.9901 tons/year
Summary Information
Fish Passability 0