Road Stream Crossing Site EUP_6337781088
Pine River Watershed, Hiawatha Run
Bay Rd
Mackinac County
Information collected by:
Superior Watershed Partnership
Site Location
GPS Coordinates: 46.143516898,-84.581937287
T 043NN R 002W Sec 05
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 0.55 tons/year
Date Inventoried: 6/23/2020
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: 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: Corrugated
Is Structure Rusted through? Yes
Dimensions of Structure: Length 56.4 ft. Width 3 ft. Height 3 ft.
Percentage Plugged: 81% - 100%
Percentage Crushed: 81% - 100%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.5 ft./sec.
Structure Outlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.5 ft./sec.
*Water Velocities were measured 2 ft. below 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 20 ft., Width 6 ft., Depth 3.5 ft.
Is Upstream Ponding Present? Yes
Pond: Length 24 ft., Width 12 ft.
Riffle Information
Water Depth: 1.8 ft.
Bankfull Width: 5.2 ft.
Wetted Width: 5 ft.
Water Velocity: 0.7 ft./sec. (measured via Float Test)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
Road Information
Road Surface: Paved
Owner: Township
Road Condition: Broken Pavement or Rilled/Gullied, Multiple patches, cracks, rilling, or gullies at crossing.
Road Width at Culvert: 26.2 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 6 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 1000 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.49 tons/year
Right Approach
Length: 75 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.02 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.55 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) | ||
Right Downstream Embankment1 | 5 ft. | 2.8 ft. | 3 ft. | Yes | Gravelly Loam | Minor (corrective actions recommended) | 0.04 |
1Most likely from the discontinuous culvert parts
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, To assess discontinuous culvert parts.
Were any non-native species observerd at this site? No
Site Comments: Lots of rain recently
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.