Road Stream Crossing Site BEAR_BC080

Bear Creek Watershed, Cedar Creek
Creamery Rd
Maple Grove Twp, Manistee County
Information collected by:
Site Location
GPS Coordinates: 44.37582 , -85.97265
T23N R14W Sec 23
Owned by Private
Structure is NOT Perched
Total Erosion: 2.672 tons/year
Severity: Severe
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: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
1
4 ft.
30 ft.
4 ft.
Metal
2
4 ft.
30 ft.
4 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 30 ft. , Width 4 ft. , Height 4 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.8 ft./sec.
Structure Outlet
Water Depth: 0.35 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.8 ft./sec.
*Water Velocities were measured 0.21 ft. below Surface (with Meter)
Additional Comments

Culvert #2 was used for structure data. Culvert #1 is perched by 0.3 feet. The inlets of both culverts are 0.2 feet above stream grade.

Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 25 ft. , Width 25 ft. , Depth 3 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 16.5 ft.
Wetted Width: 13 ft.
Water Velocity: 0.9 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel County Road
Road Condition: Fair
Road Width at Culvert: 15 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.1 ft.
Slope: Vertical
Downstream
Fill Depth: 0.2 ft.
Slope: Vertical
Approaches
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.2066 tons/year
Right Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 2.3554 tons/year
Erosion Information
Total Erosion at Crossing: 2.672 tons/year
Extent of Erosion: Moderate
Notes:

Moderate erosion due to steep vertical embankments that are lacking stabilizing vegetation and receiving direct road runoff.

Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Upstream Embankment
7 ft.
4 ft.
1 ft.
yes
Sandy Loam
0.047
Left Downstream Embankment
6 ft.
4 ft.
1.5 ft.
yes
Gravelly Loam
0.063
Summary Information
Erosion is an area of concern for this site.

As well as fish passage.