Road Stream Crossing Site EUP_CHRW56
Charlotte River Watershed, Unnamed
S Mackinac Trail
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.3878998,-84.4005147
T 046N R 001 Sec 14
Fish Passability: Potential Behavioral Barrier
Structure is NOT Perched
Total Erosion: 1.62 tons/year
Overall Score: 15
Severity: Moderate
Date Inventoried: 8/3/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Headwall and Wingwall
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: None
General Conditions: Light superficial corrosion or abrasion or chipping or spalling or cracking. No shape changes (described above).
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 42 ft. Width 18 ft. Height 9 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 5.4 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 3.5 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the surface (via Flow Meter).
Stream Information
Stream Flow: = Bankfull – Water has completely filled the stream channel, but is not flowing onto the floodplain.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? No
Is Upstream Ponding Present? Yes
Pond: Length 20 ft., Width 25 ft.
Riffle Information
Water Depth: 2.8 ft.
Bankfull Width: 6 ft.
Wetted Width: 6 ft.
Dominant Substrate: Organics – decomposing plant material
Road Information
Road Surface: Paved
Owner: County
Road Condition: Broken Pavement or Rilled/Gullied, Multiple patches, cracks, rilling, or gullies at crossing.
Road Core Integrity: Fair (some of the symptoms may be present, but not to an extent posing high risk to the crossing)
Road Width at Culvert: 28 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 0 ft.
Slope: Vertical, 0:1, or 90°
Downstream
Fill Depth: 0 ft.
Slope: Vertical, 0:1, or 90°
Approaches
Left Approach
Length: 700 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.18 tons/year
Right Approach
Length: 850 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.44 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.62 tons/year
Summary Information
Fish Passability: Potential Behavioral Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, white sweet clover, birds foot trefoil, wild parsnip, canada thistle.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.