Road Stream Crossing Site BSAB_BS50

Big Sable River Watershed, Tributary of Big Sable River
Freesoil Rd
Freesoil Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 44.10735 , -86.22821
T20N R16W Sec 21
Owned by Private
Fish Passability 1
Structure is NOT Perched
Total Erosion: 0.494 tons/year
Severity: Minor
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: 2
Structure Shape: Round
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Fair
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
1
3.5 ft.
40 ft.
3.5 ft.
Metal
2
3.5 ft.
40 ft.
3.5 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 40 ft. , Width 3.5 ft. , Height 3.5 ft.
Percentage Plugged: Outlet: 1% to 25%
Structure is NOT Perched
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 1 ft.
Water Velocity*: 0.05 ft./sec.
Structure Outlet
Water Depth: 0.28 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 0.3 ft./sec.
*Water Velocities were measured 0.17 ft. below Surface (with Meter)
Additional Comments
The left culvert (#1) is 50% plugged at outlet and did not have flow at the time of data collection. Culvert #2 was used to collect structure data
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.13 ft.
Bankfull Width: 6 ft.
Wetted Width: 3.8 ft.
Water Velocity: 1 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 25 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3 ft.
Slope: Vertical
Downstream
Fill Depth: 3.1 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.4711 tons/year
Right Approach
Length: 555 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0229 tons/year
Erosion Information
Total Erosion at Crossing: 0.494 tons/year
Summary Information
Fish Passability 1
These non-native species were observerd at this site: Knapweed