Road Stream Crossing Site EUP_SI17
Saint Marys River Watershed, Unnamed
E Seppi Road
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.5061058,-84.2295698
T 047N R 002 Sec 06
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 2.38 tons/year
Overall Score: 15
Severity: Moderate
Date Inventoried: 7/1/2021
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: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Rock
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 46 ft. Width 8 ft. Height 8 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
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: 0.2 ft.
Bankfull Width: 7 ft.
Wetted Width: 3 ft.
Water Velocity: 0.1 ft./sec. (measured via Float Test)
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: 18.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 8.1 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 8 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 250 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.68 tons/year
Right Approach
Length: 300 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.7 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 2.38 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? Yes, Burdock, birds-foot trefoil, leafy spurge, wild parsnip.
Site Comments: Downstream culvert photo not taken due to steep slopes and wild parsnip
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.