Road Stream Crossing Site EUP_6336653859
Carp River Watershed, Taylor creek
Unnamed (FR 3329)
Mackinac County
Information collected by:
Superior Watershed Partnership
Site Location
GPS Coordinates: 46.1320812160001,-84.9019797239999
T 043NN R 005W Sec 11
Owned by Federal
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 0.63 tons/year
Date Inventoried: 6/9/2020
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Ellipse
Inlet Type: Apron
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 64 ft. Width 4.5 ft. Height 3.5 ft.
Percentage Plugged: 1% - 20%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 1.4 ft./sec.
Structure Outlet
Water Depth: 0.7 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 – The stream channel is more than half filled with water, but is not full.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? Yes
Scour Pool: Length 24 ft., Width 20 ft., Depth 3.5 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 10 ft.
Wetted Width: 7 ft.
Water Velocity: 0.6 ft./sec. (measured via Float Test)
Dominant Substrate: Cobble – baseball-sized or larger rocks (10in)
Road Information
Road Surface: Gravel
Owner: Other
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Width at Culvert: 9.8 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 25 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 20 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 300 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.37 tons/year
Right Approach
Length: 200 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.23 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.63 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 Embankment | 5.5 ft. | 2.2 ft. | 2.5 ft. | Yes | Gravelly Loam | Minor (corrective actions recommended) | 0.02 |
Left Upstream Embankment | 5 ft. | 2.5 ft. | 1.5 ft. | Yes | Gravelly Loam | Minor (corrective actions recommended) | 0.01 |
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? No
Site Comments: Velocity taken thru culvert. Erosion is not priority for stream or road. Scour pool is quite significant
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.