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
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