Road Stream Crossing Site AUS_CR091
Au Sable River Watershed, Big Creek
North Down River Rd
Lovells Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.71559
, -84.40911
T27N
R01W
Sec 23
Owned by Private
Fish Passability 0
Structure is NOT Perched
Total Erosion: 6.3751 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: Concrete
Structure Substrate: Rock
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 55 ft.
, Width 49.7 ft.
, Height 7 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.57 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.1 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 1.2 ft.
Bankfull Width: 39 ft.
Wetted Width: 35 ft.
Water Velocity: 3.52 ft./sec.
(Measured with Float Test)
Dominant Substrate: Cobble
Road Information
Paved
County Road
Road Condition: Poor
Road Width at Culvert: 27 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 565 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 4.575
Erosion: 2.3071 tons/year
Right Approach
Length: 845 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 5.394
Erosion: 4.068 tons/year
Erosion Information
Total Erosion at Crossing: 6.3751 tons/year
Extent of Erosion: Moderate
Notes: Undercut bank on upstream and downstream side
Summary Information
Fish Passability 0
Erosion is an area of concern for this site.
Undercut bank on downstream side that needs to checked out.
A future visit to this site is recommended. To check out bank erosion
These non-native species were observerd at this site: Queen Anne's Lace, Bull Thistle, Mullein