Road Stream Crossing Site BSAB_BS79
Big Sable River Watershed, Tributary of Big Sable River
Townline Rd
Grant Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 44.08
, -86.32137
T20N
R17W
Sec 34
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 2.8939 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: Open Bottom Arch
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Metal
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 90 ft.
, Width 18 ft.
, Height 4 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.18 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.7 ft./sec.
Structure Outlet
Water Depth: 2.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured 0.71 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 15 ft.
, Width 20 ft.
, Depth 3 ft.
Riffle Information
Water Depth: 0.56 ft.
Bankfull Width: 10.2 ft.
Wetted Width: 6.3 ft.
Water Velocity: 0.6 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 23 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 5.3 ft.
Slope: 1:1.5
Downstream
Fill Depth: 5.3 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 1.5587 tons/year
Right Approach
Length: 426 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 4.078
Erosion: 1.3209 tons/year
Erosion Information
Total Erosion at Crossing: 2.8939 tons/year
Extent of Erosion: Minor
Notes: Minor embankment erosion due to runoff
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Upstream Embankment |
10 ft. |
3 ft. |
1.5 ft. |
yes |
Sandy Loam |
0.0144 |
Summary Information
Fish Passability 0.9
These non-native species were observerd at this site: Knapweed