Road Stream Crossing Site BSAB_BS70

Big Sable River Watershed, Tributary of Big Sable River
Freesoil Rd
Grant Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 44.10856 , -86.28883
T20N R17W Sec 24
Owned by Private
Fish Passability 0
Perch Height: 0.5 ft.
Total Erosion: 1.0005 tons/year
Severity: Severe
Year Inventoried: 2011
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: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 60 ft. , Width 3 ft. , Height 3 ft.
Perch Height: 0.5 ft.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Meter)
Additional Comments
1) Intermittent stream dry at the time of data collection 2) evidence of upstream and downstream scour erosion 3) the center of the culvert is at a higher elevation than the inlet and outlet
Stream Information
Stream Flow: None
Riffle Information
Water Depth: 0 ft.
Bankfull Width: 6.5 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 25 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 5.3 ft.
Slope: 1:1
Downstream
Fill Depth: 5.6 ft.
Slope: Vertical
Approaches
Left Approach
Length: 861 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.556
Erosion: 0.3957 tons/year
Right Approach
Length: 438 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.57
Erosion: 0.5683 tons/year
Erosion Information
Total Erosion at Crossing: 1.0005 tons/year
Extent of Erosion: Minor
Notes: Minor embankment erosion due to lack of stabilizing vegetation and a mispositioned tube resulting in scour erosion upstream and downstream
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Downstream Embankment
12 ft.
2 ft.
1.5 ft.
yes
Sandy Loam
0.0173
Right Downstream Embankment
20 ft.
2.5 ft.
1 ft.
yes
Sandy Loam
0.0192
Summary Information
Fish Passability 0