Road Stream Crossing Site CLHW_MC-009
Mill Creek Watershed, Unnamed
N Old Mackinaw Rd
Mackinaw Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.73147
, -84.64242
T39N
R3W
Sec 35
Owned by Private
Fish Passability 1
Structure is NOT Perched
Total Erosion: 0.3422 tons/year
Severity: Minor
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: Headwall
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Poor
Structure Interior: smooth
Dimensions of Structure: Length 42 ft.
, Width 4 ft.
, Height 2.6 ft.
Percentage Crushed:
Inlet: 1% to 25%
Outlet: 0%
In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.7 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.7 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 52 ft.
, Width 25 ft.
, Depth 0.6 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 7 ft.
Wetted Width: 3.6 ft.
Water Velocity: 1 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Poor
Road Width at Culvert: 19 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.5 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.0867 tons/year
Right Approach
Length: 750 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.543
Erosion: 0.2556 tons/year
Erosion Information
Total Erosion at Crossing: 0.3422 tons/year
Summary Information
Fish Passability 1