Road Stream Crossing Site EUP_6337703480
Pine River Watershed, S Chub Creek
S chub creek rd
Chippewa County
Information collected by:
Superior Watershed Partnership
Site Location
GPS Coordinates: 46.170684029,-84.634388471
T 044NN R 003W Sec 35
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 22.72 tons/year
Date Inventoried: 6/17/2020
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: Sand
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: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 52 ft. Width 7 ft. Height 7 ft.
Percentage Plugged: 1% - 20%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.43 ft./sec.
Structure Outlet
Water Depth: 2.2 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
Stream Information
Stream Flow: < Bankfull – The stream channel is more than half filled with water, but is not full.
Is Scour Pool Present? Yes
Scour Pool: Length 90 ft., Width 70 ft., Depth 3 ft.
Is Upstream Ponding Present? Yes
Pond: Length 40 ft., Width 40 ft.
Riffle Information
Water Depth: 1.3 ft.
Bankfull Width: 24 ft.
Wetted Width: 23 ft.
Water Velocity: 0.25 ft./sec. (measured via Float Test)
Dominant Substrate: Clay – very fine particles that stick together
Road Information
Road Surface: Gravel
Owner: Township
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Width at Culvert: 22 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 8 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 10 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 317 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.89 tons/year
Right Approach
Length: 143 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.95 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 22.72 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 | 13 ft. | 7.5 ft. | 10 ft. | Yes | Gravel | Severe (corrective actions recommended) | 19.5 |
Left Downstream Streambank2 | 24 ft. | 3 ft. | 2.5 ft. | Yes | Clay | Moderate (corrective actions recommended) | 0.88 |
Left Downstream Ditch3 | 4 ft. | 6 ft. | 3 ft. | No | Gravel | Moderate (corrective actions recommended) | 0.5 |
1Directly above culvert upstream.
2From scour pool.
3About 3 areas of the same dimensions.
2From scour pool.
3About 3 areas of the same dimensions.
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, Erosion.
Were any non-native species observerd at this site? No
Site Comments: Velocity taken thru structure.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.