Road Stream Crossing Site EUP_SI05
Saint Marys River Watershed, Wilmar Creek
E 2 1/4 Mile Road
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.4738848,-84.1936817
T 047N R 002 Sec 16
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 1.07 tons/year
Overall Score: 15
Severity: Moderate
Date Inventoried: 6/30/2021
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: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 90 ft. Width 12 ft. Height 7.3 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.2 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured 0.2 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < 1/2 Bankfull – The stream channel is less than half filled with water.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 9.5 ft.
Wetted Width: 4 ft.
Water Velocity: 0.2 ft./sec. (measured via Flow Meter)
Dominant Substrate: Clay – very fine particles that stick together
Road Information
Road Surface: Gravel
Owner: County
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 27 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 5.3 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 5.5 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 270 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 1.07 tons/year
Right Approach
Length: 0 ft.
Slope: 1-5%
Vegetation: None, Ditch has been recently graded and is bare of vegetation.
Erosion Estimate: 0 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.07 tons/year
Summary Information
Fish Passability: Barrier at Most Flows
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? No
Site Comments: Culvert replaced in spring of 2021
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.