Road Stream Crossing Site BEAR_BC062
Bear Creek Watershed, Big Bear Creek
Johnson Rd
Maple Grove Twp,
Manistee County
Information collected by:
Site Location
GPS Coordinates: 44.34169
, -86.04195
T23N
R14W
Sec 31
Owned by Private
Structure is NOT Perched
Total Erosion: 2.0355 tons/year
Severity: Moderate
Year Inventoried: 2011
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 3
Structure Shape: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 75 ft.
, Width 17 ft.
, Height 10 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2.05 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.8 ft./sec.
Structure Outlet
Water Depth: 1.72 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 1.32 ft.
Bankfull Width: 57.4 ft.
Wetted Width: 55.8 ft.
Water Velocity: 2.9 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 30 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3.5 ft.
Slope: 1:1
Downstream
Fill Depth: 3.4 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 2.0331 tons/year
Right Approach
Length: 50 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0025 tons/year
Erosion Information
Total Erosion at Crossing: 2.0355 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.