Road Stream Crossing Site BEAR_BC078

Bear Creek Watershed, Cedar Creek
Bigge Rd
Maple Grove Twp, Manistee County
Information collected by:
Site Location
GPS Coordinates: 44.38247 , -85.96566
T23N R14W Sec 23
Owned by Private
Structure is NOT Perched
Total Erosion: 0.6265 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: 2
Structure Shape: Ellipse
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 40 ft. , Width 4.5 ft. , Height 3.3 ft.
Percentage Crushed: Inlet: 0% Outlet: 0% In Pipe: 1% to 25%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.21 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.8 ft./sec.
Structure Outlet
Water Depth: 0.52 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.2 ft./sec.
*Water Velocities were measured 0.31 ft. below Surface (with Meter)
Additional Comments

Culvert #2 was used to collect structure data. Culvert #1 had no stream flow.

Stream Information
Stream Flow: Less than Bankfull
Upstream Pond: Length 4 ft. , Width 3.6 ft. , Depth 1.33 ft.
Riffle Information
Water Depth: 0.54 ft.
Bankfull Width: 10.5 ft.
Wetted Width: 7.7 ft.
Water Velocity: 1.4 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel County Road
Road Condition: Good
Road Width at Culvert: 20 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2.4 ft.
Slope: 1:1
Downstream
Fill Depth: 1.5 ft.
Slope: 1:1
Approaches
Left Approach
Length: 1000 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.2755 tons/year
Right Approach
Length: 996 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.2744 tons/year
Erosion Information
Total Erosion at Crossing: 0.6265 tons/year
Extent of Erosion: Moderate
Erosion is occurring and corrective actions can be installed to address the problem.
Notes:

Embankments lack stabilizing vegetation and show signs of 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
5 ft.
4 ft.
1 ft.
yes
Sandy Loam
0.0336
Right Downstream Embankment
8 ft.
4 ft.
0.8 ft.
yes
Sandy Loam
0.043
Summary Information
Erosion is an area of concern for this site.
A future visit to this site is recommended.

To further assess extent of erosion and determine appropriate corrective action.

These non-native species were observerd at this site: Knapweed