Road Stream Crossing Site PM_L063

Pere Marquette River Watershed, Sanborn Creek tributary
US-10
Cherry Valley Twp, Lake County
Information collected by:
Site Location
GPS Coordinates: 43.9010465346601 , -85.7870288193226
T18N R12W Sec 31
Owned by Private
State
Total Erosion: 0.0246 tons/year
Severity: Moderate
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 58 ft. , Width 6 ft. , Height 6 ft.
Structure Inlet
Water Depth: 2.1 ft.
Embedded Depth of Structure: 1 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 2.2 ft.
Embedded Depth of Structure: 1.5 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured 0.5 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.4 ft.
Bankfull Width: 12 ft.
Wetted Width: 3.5 ft.
Water Velocity: 1.2 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved Federal Road
Road Condition: Good
Road Width at Culvert: 45 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4 ft.
Slope: 1:1.5
Downstream
Fill Depth: 3.5 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 140 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0104 tons/year
Right Approach
Length: 150 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0112 tons/year
Erosion Information
Total Erosion at Crossing: 0.0246 tons/year
Extent of Erosion: Minor
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Right Downstream Embankment
6 ft.
2 ft.
0.5 ft.
yes
Gravel
0.003
Summary Information
Erosion is an area of concern for this site.