Road Stream Crossing Site CLHW_GCBM-007
Greene Creek-Black Mallard River Watershed, Elliot Creek
US-23
Benton Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.64636
, -84.39495
T38N
R1W
Sec 35
Owned by State
Fish Passability 1
Structure is NOT Perched
Total Erosion: 0.716 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: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 44 ft.
, Width 12 ft.
, Height 4.8 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 1.1 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 1.1 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: 1.2 ft.
Bankfull Width: 23 ft.
Wetted Width: 17 ft.
Water Velocity: 1 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
Federal Road
Road Condition: Fair
Road Width at Culvert: 38 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
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: 0.716 tons/year
Erosion Information
Total Erosion at Crossing: 0.716 tons/year
Summary Information
Fish Passability 1