Road Stream Crossing Site EUP_CHRW11
Charlotte River Watershed, Unnamed
12 Mile Rd
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.331258,-84.352993
T 046N R 001 Sec 31
Fish Passability: Potential Behavioral Barrier
Structure is NOT Perched
Total Erosion: 0.09 tons/year
Overall Score: 19
Severity: Moderate
Date Inventoried: 6/9/2021
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: Ellipse
Inlet Type: Mitered
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 64 ft. Width 8 ft. Height 7 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 3.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the surface (via Flow Meter).
Stream Information
Stream Flow: < Bankfull – The stream channel is more than half filled with water, but is not full.
Stream Flow Type: Intermittent (if channel is dry but has obviously flowed recently, appears to flow annually).
Is Scour Pool Present? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 2 ft.
Bankfull Width: 13 ft.
Wetted Width: 10.5 ft.
Water Velocity: 0 ft./sec. (measured via Float Test)
Dominant Substrate: Silt – very fine particles that don't stick together
Road Information
Road Surface: Paved
Owner: County
Road Condition: Old Pavement or Rutted, Minor cracking or rutting/ponding at crossing all or part of crossing length.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 33 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 7 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 7 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 300 ft.
Slope: < 1%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.02 tons/year
Right Approach
Length: 1000 ft.
Slope: < 1%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.07 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.09 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, Leafy spurge, reed canary grass, birds foot treefoil.
Site Comments: Beaver dam blocking all flow upstream of crossing.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.