Road Stream Crossing Site EUP_6337505764
Pine River Watershed, Bear creek
S. Dryburg rd
Chippewa County
Information collected by:
Superior Watershed Partnership
Site Location
GPS Coordinates: 46.20512397,-84.677172303
T 044NN R 003W Sec 16
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 1.72 tons/year
Date Inventoried: 6/23/2020
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Square/Rectangle
Inlet Type: Wingwall 30 to 70 degrees
Outlet Type: Other
Structure Material: Concrete
Structure Substrate: None
General Conditions: Moderate deterioration from corrosion or abrasion (small rust flakes or indication that rust is slightly deeper than the surface level) or cracking or spalling or chipping (few minor cracks or localized chipping in the concrete). OR minor shape changes (described above).
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 36 ft. Width 7.5 ft. Height 7 ft.
Percentage Plugged: 21% - 40%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.667 ft./sec.
Structure Outlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
Stream Information
Stream Flow: > Bankfull – Water has filled the stream channel and is flowing onto the floodplain.
Is Scour Pool Present? Yes
Scour Pool: Length 51 ft., Width 32 ft., Depth 0 ft.
Is Upstream Ponding Present? Yes
Pond: Length 13 ft., Width 6 ft.
Riffle Information
Water Depth: 5 ft.
Bankfull Width: 15 ft.
Wetted Width: 15 ft.
Water Velocity: 1 ft./sec. (measured via Float Test)
Dominant Substrate: Clay – very fine particles that 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 Width at Culvert: 24 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 15 ft.
Slope: Vertical, 0:1, or 90°
Downstream
Fill Depth: 14 ft.
Slope: Vertical, 0:1, or 90°
Approaches
Left Approach
Length: 390 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.47 tons/year
Right Approach
Length: 385 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.46 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.72 tons/year
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Extent of Erosion | Estimated Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | ||
Left Downstream Embankment1 | 4.5 ft. | 9 ft. | 4 ft. | Yes | Clay | Moderate (corrective actions recommended) | 0.79 |
1Erosion directly above culvert outlet.
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, Fish passage + erosion.
Were any non-native species observerd at this site? No
Site Comments: Deep scour 4+ ft by inlets. Outlets may be perched at lower water levels. Data recorded after 10+ hours of heavy rain.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.