Road Stream Crossing Site EUP_43N5W6_001
Carp River Watershed, Unnamed Tributary to Ozark Creek
St. Ignace to Trout Lake Trl
Mackinac County
Information collected by:
USFS
Site Location
GPS Coordinates: 46.1527100000001,-84.97451
T 043NN R 005W Sec 06
Owned by Federal
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 0.02 tons/year
Overall Score: 15
Severity: Moderate
Date Inventoried: 7/13/2016
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: None
General Conditions: Not new, but no noticeable corrosion, abrasion, chipping, spalling, or cracking. No shape changes such as barrel distortion (bowing, bending, warping), bulging, inlet or outlet damaged.
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 25 ft. Width 3 ft. Height 3 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 1.7 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: < 1/2 Bankfull – The stream channel is less than half filled with water.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? Yes
Scour Pool: Length 20 ft., Width 8 ft., Depth 1.7 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 5 ft.
Wetted Width: 4 ft.
Water Velocity: 0 ft./sec. (measured via Float Test)
Dominant Substrate: Organics – decomposing plant material
Road Information
Road Surface: Gravel
Owner: County
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: 10.5 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 1 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 100 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.01 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: 0.01 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.02 tons/year
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? Yes, Spotted Knapweed, Oxe-eye Daisy, St. Johns Wort, Wild Parsnip.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.