Road Stream Crossing Site AUS_CR090
Au Sable River Watershed, East Branch Big Creek
Walsh Rd
Lovells Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.73913
, -84.37986
T27N
R01W
Sec 13
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 53.9869 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Pipe Arch,Open Bottom Arch
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 33 ft.
, Width 23 ft.
, Height 6.6 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.04 ft./sec.
Structure Outlet
Water Depth: 2.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.22 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 22 ft.
, Width 23 ft.
, Depth 3.5 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 1.3 ft.
Bankfull Width: 30 ft.
Wetted Width: 25 ft.
Water Velocity: 1.54 ft./sec.
(Measured with Float Test)
Dominant Substrate: Cobble
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 25 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: 1000 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 5.785
Erosion: 39.8416 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 14.1185 tons/year
Erosion Information
Total Erosion at Crossing: 53.9869 tons/year
Extent of Erosion: Minor
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Upstream |
20 ft. |
5 ft. |
0.8 ft. |
yes |
Sand |
0.0176 |
Right Downstream |
14 ft. |
8 ft. |
0.6 ft. |
yes |
Sand |
0.0092 |
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. See if scour pool is increasing in size and spot if any erosion is occuring.
These non-native species were observerd at this site: Spotted Knapweed, Mullein