Road Stream Crossing Site BSAB_BS69
Big Sable River Watershed, Tributary of Big Sable River
Forest Trail Rd
Grant Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 44.126
, -86.28959
T20N
R17W
Sec 13
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.5075 tons/year
Severity: Moderate
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: Mitered
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 170 ft.
, Width 5 ft.
, Height 5 ft.
Percentage Plugged:
Inlet: 26% to 50%
Outlet: 26% to 50%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.5 ft./sec.
Structure Outlet
Water Depth: 1.04 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.8 ft./sec.
*Water Velocities were measured 0.36 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 10 ft.
, Width 12 ft.
, Depth 1.91 ft.
Riffle Information
Water Depth: 0.65 ft.
Bankfull Width: 8.5 ft.
Wetted Width: 7.1 ft.
Water Velocity: 0.8 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 26 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 10 ft.
Slope: 1:1.5
Downstream
Fill Depth: 10 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.4899 tons/year
Right Approach
Length: 408 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0175 tons/year
Erosion Information
Total Erosion at Crossing: 0.5075 tons/year
Summary Information
Fish Passability 0.5
These non-native species were observerd at this site: Knapweed