Road Stream Crossing Site EUP_42N4W16_001
Carp River Watershed, South Tributary Flat Creek
East Lake Road (FR 3119)
Mackinac County
Information collected by:
USFS
Site Location
GPS Coordinates: 46.038947867,-84.803517202
T 042NN R 004W Sec 16
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 0.32 tons/year
Overall Score: 25
Severity: Moderate
Date Inventoried: 6/20/2016
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Severe deterioration from corrosion or abrasion (more than 50% of the structure is rusted through) or cracking or spalling or chipping (more than 50% of the structure is compromised). Or Major shape changes (described above) reducing the capacity of the structure by greater than 50%. OR Segment disconnect causing major subsurface erosion/piping and/or partial fill failure and/or sink holes in the fill.
Additional (Multiple) Structures | ||||
Structure | Width | Length | Height | Material |
2 | 2 ft. | 61 ft. | 2 ft. | Plastic |
Structure Interior: Corrugated
Is Structure Rusted through? Yes
Dimensions of Structure: Length 61 ft. Width 3.5 ft. Height 3.5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 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.
Is Scour Pool Present? Yes
Scour Pool: Length 46 ft., Width 22 ft., Depth 3.4 ft.
Is Upstream Ponding Present? Yes
Pond: Length 60 ft., Width 60 ft.
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 5.5 ft.
Wetted Width: 3.3 ft.
Water Velocity: 0.5 ft./sec. (measured via Float Test)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
Road Information
Road Surface: Gravel
Owner: Federal
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: 30.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.6 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 4.9 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 100 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.04 tons/year
Right Approach
Length: 100 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.04 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.32 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 Embankment | 4.5 ft. | 10 ft. | 5.5 ft. | Yes | Sandy Loam | Minor (corrective actions recommended) | 0.24 |
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, Floods road frequently by beaver. Emergency repair condition.
Were any non-native species observerd at this site? Yes, Spotted Knapweed, Oxe-eye Daisy.
Site Comments: Undersized structure. Fish Passage Barrier
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.