Road Stream Crossing Site AUS_PR135
Au Sable River Watershed, Tributary of Backus Creek
M-72
Millen Twp,
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.65545
, -83.52843
T26N
R07E
Sec 12,13
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.6046 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: Round
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: None
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 175 ft.
, Width 8 ft.
, Height 8 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1 ft./sec.
Structure Outlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.9 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Additional Comments
Outlet also is wingwall 10-30 degree.
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: 0.2 ft.
Bankfull Width: 6.7 ft.
Wetted Width: 4.7 ft.
Water Velocity: 0.7 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
State Road
Road Condition: Good
Road Width at Culvert: 37 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 35 ft.
Slope: More than 1:2
Downstream
Fill Depth: 30 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 885 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.559
Erosion: 0.6046 tons/year
Right Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.6046 tons/year
Summary Information
Fish Passability 0.5
Fish Passage is an area of concern for this site.
The culvert is very long, possibly posing a barrier to fish passage.
A future visit to this site is recommended. To evaluate whether the culvert is too long and definitly posing a barrier to fish passage.
These non-native species were observerd at this site: Autumn Olive, Mullein, Spotted Knapweed, Sweet Clover