Road Stream Crossing Site AUS_PR132
Au Sable River Watershed, Backus Creek
M-72
Millen Twp,
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.65488
, -83.56297
T26N
R07E
Sec 11,14
Owned by Private
Structure is NOT Perched
Total Erosion: 1.4698 tons/year
Severity: Moderate
Year Inventoried: 2013
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: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 63 ft.
, Width 11.3 ft.
, Height 6 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.2 ft./sec.
Structure Outlet
Water Depth: 1.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.3 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 11.5 ft.
, Width 11.2 ft.
, Depth 1.1 ft.
Upstream Pond: Length 17 ft.
, Width 10 ft.
, Depth 0.9 ft.
Riffle Information
Water Depth: 1.8 ft.
Bankfull Width: 9.5 ft.
Wetted Width: 7.3 ft.
Water Velocity: 0.7 ft./sec.
(Measured with Float Test)
Dominant Substrate: Silt
Road Information
Paved
State Road
Road Condition: Good
Road Width at Culvert: 39 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.7 ft.
Slope: 1:2
Downstream
Fill Depth: 4.7 ft.
Slope: 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.7349 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.7349 tons/year
Erosion Information
Total Erosion at Crossing: 1.4698 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.
No, there are no fish passage barriers orerosion.
A future visit to this site is recommended.
The scour pool is undercutting the left bank. Evaluation of a plan of action for this is necessary.
These non-native species were observerd at this site: Sweet Clover, Reed Canarygrass?