Road Stream Crossing Site BSAB_BS82
Big Sable River Watershed, Tributary of Big Sable River
Townline Rd
Grant Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 44.08067
, -86.34669
T20N
R17W
Sec 33
Owned by Private
Fish Passability 0
Perch Height: 1.5 ft.
Total Erosion: 7.6496 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: Pipe Arch
Inlet Type: Projecting
Outlet Type: Cascade over Riprap
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 90 ft.
, Width 10.6 ft.
, Height 6.5 ft.
Perch Height: 1.5 ft.
Structure Inlet
Water Depth: 0.13 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.05 ft./sec.
Structure Outlet
Water Depth: 0.19 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.05 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Additional Comments
1) Riprap placed at inlet and outlet
2) 210 ft of the left approach and 97 ft of the right approach is paved the remaining lengths are gravel
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 12 ft.
, Width 12 ft.
, Depth 1.75 ft.
Riffle Information
Water Depth: 0.49 ft.
Bankfull Width: 7.5 ft.
Wetted Width: 5.7 ft.
Water Velocity: 0.05 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 20 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 10 ft.
Slope: 1:1
Downstream
Fill Depth: 9.6 ft.
Slope: 1:1
Approaches
Left Approach
Length: 1000 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 5.785
Erosion: 3.8248 tons/year
Right Approach
Length: 1000 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 5.785
Erosion: 3.8248 tons/year
Erosion Information
Total Erosion at Crossing: 7.6496 tons/year
Summary Information
Fish Passability 0