Road Stream Crossing Site EUP_Trout lake 7
Carp River Watershed, Ozark Creek
N Ozark Rd
Mackinac County
Information collected by:
MiDNR
Site Location
GPS Coordinates: 46.130909,-84.9901047
T 043N R 006 Sec 12
Owned by Federal
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 0 tons/year
Overall Score: 35
Severity: Severe
Date Inventoried: 10/13/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Site Sketch
Crossing Information*
Type of Crossing: Bridge
Number of Structures: 1
Structure Shape: Square/Rectangle
Inlet Type: Headwall and Wingwall
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: Mixture
General Conditions: Deterioration, shape changes, or segment disconnection more severe than the previous category to the extent that the road manager should be contacted to determine if the road should be closed.
Structure Interior: Smooth
Dimensions of Structure: Length 11 ft. Width 19 ft. Height 4 ft.
Percentage Plugged: 1% - 20% Inlet
Percentage Crushed: 41% - 60%
Structure is NOT Perched
Structure Inlet
Water Depth: 4.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 5 ft./sec.
Structure Outlet
Water Depth: 3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 5 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
Stream Information
Stream Flow: > Bankfull – Water has filled the stream channel and is flowing onto the floodplain.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? No
Is Upstream Ponding Present? Yes
Pond: Length 300 ft., Width 200 ft.
Riffle Information
Water Depth: 3 ft.
Bankfull Width: 30 ft.
Wetted Width: 30 ft.
Water Velocity: 5 ft./sec. (measured via Float Test)
Dominant Substrate: Organics – decomposing plant material
Road Information
Road Surface: Native Surface
Owner: State
Manager: DNR Forest Resources Division
Road Condition: Old Pavement or Rutted, Minor cracking or rutting/ponding at crossing all or part of crossing length.
Road Core Integrity: Fair (some of the symptoms may be present, but not to an extent posing high risk to the crossing)
Road Width at Culvert: 7 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 0 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 0 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 0 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Right Approach
Length: 0 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0 tons/year
Summary Information
Fish Passability: Barrier
Site Comments: Road
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.