Road Stream Crossing Site PM_L074
Pere Marquette River Watershed, Pere Marquette tributary
W 40th Ave
Sweetwater Twp,
Lake County
Information collected by:
Site Location
GPS Coordinates: 43.90123
, -85.96863
T18N
R14W
Sec 34
Owned by Private
Total Erosion: 2.2306 tons/year
Severity: Severe
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: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 40 ft.
, Width 1.5 ft.
, Height 1.5 ft.
Structure Inlet
Water Depth: 0.2 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.25 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured 0.1 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 4 ft.
Wetted Width: 2 ft.
Water Velocity: 0.1 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 18 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 4 ft.
Slope: 1:1.5
Downstream
Fill Depth: 8 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 220 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.434
Erosion: 0.4735 tons/year
Right Approach
Length: 275 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.45
Erosion: 0.6136 tons/year
Erosion Information
Total Erosion at Crossing: 2.2306 tons/year
Extent of Erosion: Moderate
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Approach |
275 ft. |
4 ft. |
0.2 ft. |
no |
Sand |
0.4235 |
Right Approach |
275 ft. |
2 ft. |
0.1 ft. |
yes |
Sand |
0.2118 |
Left Approach |
220 ft. |
4 ft. |
0.2 ft. |
no |
Sand |
0.3388 |
Left Approach |
220 ft. |
2 ft. |
0.1 ft. |
yes |
Sand |
0.1694 |
Summary Information
Erosion is an area of concern for this site.