Road Stream Crossing Site PM_M103

Pere Marquette River Watershed, Swan Creek tributary
Hawley Rd
Riverton Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 43.87601 , -86.30266
T17N R17W Sec 11
Owned by Private
Fish Passability 0.5
Total Erosion: 0.1883 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: Apron
Outlet Type: Outlet Apron
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 85 ft. , Width 6 ft. , Height 6 ft.
Structure Inlet
Water Depth: 0.2 ft.
Water Velocity*: 2.1 ft./sec.
Structure Outlet
Water Depth: 0.3 ft.
Water Velocity*: 2.4 ft./sec.
*Water Velocities were measured at the Surface (with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 14 ft.
Wetted Width: 7 ft.
Water Velocity: 1.4 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 23 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 20 ft.
Slope: 1:1.5
Downstream
Fill Depth: 22 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 160 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.406
Erosion: 0.0494 tons/year
Right Approach
Length: 160 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.142
Erosion: 0.1389 tons/year
Erosion Information
Total Erosion at Crossing: 0.1883 tons/year
Summary Information
Fish Passability 0.5