Road Stream Crossing Site AUS_CR074

Au Sable River Watershed, Thayer Creek
Mason Track Trail
South Branch Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.56839 , -84.508
T25N R02W Sec 13
Owned by State
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 1.2539 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Trash Rack
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 23 ft. , Width 4 ft. , Height 3.7 ft.
Percentage Plugged: Inlet: 51% to 75% Outlet: 0% In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.246 ft./sec.
Structure Outlet
Water Depth: 1.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.397 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 21 ft.
Wetted Width: 13 ft.
Water Velocity: 0.71 ft./sec. (Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Gravel County Road
Road Condition: Fair
Road Width at Culvert: 11.5 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 1 ft.
Slope: Vertical
Fill Depth: 2 ft.
Slope: Vertical
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Right Approach
Length: 733 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.54
Erosion: 1.2539 tons/year
Erosion Information
Total Erosion at Crossing: 1.2539 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0.9
Fish Passage is an area of concern for this site. Culvert is plugged.
A future visit to this site is recommended. To unplug culvert
These non-native species were observerd at this site: Spotted Knapweed, Mullein, Burdock