Road Stream Crossing Site PM_M144
Pere Marquette River Watershed, Mosquito Creek
6th St
Amber Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 43.94168
, -86.39422
T18N
R17W
Sec 19
Owned by Private
Total Erosion: 1.9875 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: Ellipse
Inlet Type: Mitered
Outlet Type: Cascade over Riprap
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 55 ft.
, Width 8 ft.
, Height 5 ft.
Structure Inlet
Water Depth: 0.3 ft.
Water Velocity*: 3.2 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Water Velocity*: 3 ft./sec.
*Water Velocities were measured 0.2 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 22 ft.
, Width 12 ft.
, Depth 3 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 12 ft.
Wetted Width: 5 ft.
Water Velocity: 0.9 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel
County Road
Road Condition: Poor
Road Width at Culvert: 20 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 0.5 ft.
Slope: 1:2
Downstream
Fill Depth: 0.8 ft.
Slope: 1:2
Approaches
Left Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.7603 tons/year
Right Approach
Length: 180 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.186
Erosion: 1.1762 tons/year
Erosion Information
Total Erosion at Crossing: 1.9875 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 Approach |
180 ft. |
2 ft. |
0.1 ft. |
yes |
Gravel |
0.018 |
Left Approach |
300 ft. |
2 ft. |
0.1 ft. |
yes |
Sand |
0.033 |
Summary Information
Erosion is an area of concern for this site.