Road Stream Crossing Site BSAB_BS72

Big Sable River Watershed, Tributary of Big Sable River
Freeman Rd
Grant Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 44.09415 , -86.28761
T20N R17W Sec 25
Owned by Private
Structure is NOT Perched
Total Erosion: 3.7705 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: Ellipse
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Fair
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 20 ft. , Width 6.5 ft. , Height 4.7 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.76 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 with the exception of stagnant water at the inlet and in the culvert.

Stream Information
Stream Flow: None
Riffle Information
Water Depth: 0 ft.
Bankfull Width: 7 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel County Road
Road Condition: Fair
Road Width at Culvert: 20 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.9 ft.
Slope: 1:1
Downstream
Fill Depth: 4.1 ft.
Slope: 1:1
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 3.1405 tons/year
Right Approach
Length: 258 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.443
Erosion: 0.63 tons/year
Erosion Information
Total Erosion at Crossing: 3.7705 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.
A future visit to this site is recommended.

To treat phragmites stand

These non-native species were observerd at this site: Large Phragmites stand established on left downstream side