Road Stream Crossing Site CLHW_DR-003
Devils River Watershed, Holcomb Creek
Behning Rd
Sanborn Twp,
Alpena County
Information collected by:
Site Location
GPS Coordinates: 44.87532
, -83.47555
T29N
R8E
Sec 28
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 0.6061 tons/year
Severity: Moderate
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: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Rock
General Conditions: Fair
Structure Interior: smooth
Structure is Rusted through
Dimensions of Structure: Length 28 ft.
, Width 18 ft.
, Height 7 ft.
Percentage Plugged:
Inlet: 76% to 100%
Outlet: 76% to 100%
In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: None
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: 0 ft.
Bankfull Width: 0 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec.
Road Information
Gravel
County Road
Road Condition: Fair
Road Width at Culvert: 20 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2 ft.
Slope: Vertical
Downstream
Fill Depth: 2 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: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.6061 tons/year
Erosion Information
Total Erosion at Crossing: 0.6061 tons/year
Summary Information
Fish Passability 0.9