Road Stream Crossing Site CLHW_GCBM-018

Greene Creek-Black Mallard River Watershed, Unnamed stream
Benton Twp, Cheboygan County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.64549 , -84.29668
T38N R1E Sec 27
Owned by Private
Fish Passability 1
Structure is NOT Perched
Total Erosion: 0.1931 tons/year
Severity: Minor
Year Inventoried: 2016
Site ID
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: 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 100 ft. , Width 8 ft. , Height 6 ft.
Percentage Plugged: Inlet: 26% to 50% Outlet: 0% In Pipe: 0%
Percentage Crushed: Inlet: 1% to 25% Outlet: 0% In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.6 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 1.6 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 14 ft.
Wetted Width: 9 ft.
Water Velocity: 1.5 ft./sec. (Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved Federal Road
Road Condition: Good
Road Width at Culvert: 34 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 14 ft.
Slope: 1:2
Fill Depth: 16 ft.
Slope: 1:2
Left Approach
Length: 150 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.4
Erosion: 0.0674 tons/year
Right Approach
Length: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.1236 tons/year
Erosion Information
Total Erosion at Crossing: 0.1931 tons/year
Extent of Erosion: Minor
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Right Upstream Embankment
4 ft.
3 ft.
0.5 ft.
Summary Information
Fish Passability 1