Road Stream Crossing Site AUS_CR080

Au Sable River Watershed, Au Sable River
McMaster's Bridge Rd
South Branch Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.66523 , -84.697291
T26N R01W Sec 11
Owned by Private
Fish Passability 0
Structure is NOT Perched
Total Erosion: 3.173 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Rock
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 33.3 ft. , Width 102 ft. , Height 10.8 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 3.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 5 ft./sec.
Structure Outlet
Water Depth: 3.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 5.7 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 4.1 ft.
Bankfull Width: 83.5 ft.
Wetted Width: 66 ft.
Water Velocity: 3.25 ft./sec. (Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 30 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Left Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Partial
LS Factor: 3.15
Erosion: 3.124 tons/year
Right Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 3.173 tons/year
Extent of Erosion: Moderate
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Left Ditch
35 ft.
14 ft.
0.2 ft.
Summary Information
Fish Passability 0
A future visit to this site is recommended. Invasives
These non-native species were observerd at this site: Autumn Olive, Leafy Spurge, Spotted Knapweed, Queen Anne's Lace