Road Stream Crossing Site PM_M113

Pere Marquette River Watershed, Swan Creek
Scottville Rd
Riverton Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 43.88701 , -86.27866
T17N R17W Sec 12
Owned by Private
Fish Passability 0.9
Total Erosion: 0.6345 tons/year
Severity: Moderate
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Good
Dimensions of Structure: Length 30 ft. , Width 20 ft. , Height 17 ft.
Structure Inlet
Water Depth: 0.3 ft.
Water Velocity*: 0.6 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Water Velocity*: 0.8 ft./sec.
*Water Velocities were measured 0.2 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.25 ft.
Bankfull Width: 14 ft.
Wetted Width: 9 ft.
Water Velocity: 1 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 26 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Approaches
Left Approach
Length: 270 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.352
Erosion: 0.3138 tons/year
Right Approach
Length: 270 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.352
Erosion: 0.3138 tons/year
Erosion Information
Total Erosion at Crossing: 0.6345 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 Upstream Streambank
8 ft.
1 ft.
1 ft.
yes
Loam
0.007
Summary Information
Fish Passability 0.9