Road Stream Crossing Site BSAB_BS43
Big Sable River Watershed, Tributary of Big Sable River
Democrat St
Freesoil Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 44.11135
, -86.21265
T20N
R16W
Sec 22
Owned by Private
Fish Passability 0
Perch Height: 1.3 ft.
Total Erosion: 4.4176 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: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 40 ft.
, Width 6 ft.
, Height 6 ft.
Perch Height: 1.3 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
Intermittent stream dry at the time of data collection
Stream Information
Stream Flow: None
Scour Pool: Length 6 ft.
, Width 7 ft.
, Depth 2 ft.
Riffle Information
Water Depth: 0 ft.
Bankfull Width: 9 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Sand
Town Road
(Seasonal)
Road Condition: Poor
Road Width at Culvert: 14 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2.2 ft.
Slope: Vertical
Downstream
Fill Depth: 4 ft.
Slope: Vertical
Approaches
Left Approach
Length: 171 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.413
Erosion: 0.2721 tons/year
Right Approach
Length: 213 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.433
Erosion: 0.3554 tons/year
Erosion Information
Total Erosion at Crossing: 4.4176 tons/year
Extent of Erosion: Moderate
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Gully erosion present due to road runoff
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Upstream Embankment |
12 ft. |
3 ft. |
3 ft. |
yes |
Sandy Loam |
0.2419 |
Left Downstream Embankment |
20 ft. |
5 ft. |
25 ft. |
yes |
Sandy Loam |
3.36 |
Right Downstream Embankment |
14 ft. |
3 ft. |
2 ft. |
yes |
Sandy Loam |
0.1882 |
Summary Information
Fish Passability 0