Road Stream Crossing Site AUS_OS001
Au Sable River Watershed, Middle Branch Big Creek
Pickerel Lake Rd
Greenwood Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.8408000000001,-84.37096
T 028N R 001 Sec 06
Owned by State
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Overall Score: 11
Severity: Minor
Date Inventoried: 4/15/2022
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Other
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 60 ft. Width 8 ft. Height 6 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.2 ft./sec.
Structure Outlet
Water Depth: 3 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.4 ft./sec.
*Water Velocities were measured 2.3 ft. below the surface (via Flow Meter).
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? No
Is Upstream Ponding Present? Yes
Pond: Length 5 ft., Width 16 ft.
Riffle Information
Water Depth: 2.1 ft.
Bankfull Width: 16 ft.
Wetted Width: 15 ft.
Water Velocity: 1.2 ft./sec. (measured via Flow Meter)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
Road Information
Road Surface: Gravel
Owner: County
Road Condition: Old Pavement or Rutted, Minor cracking or rutting/ponding at crossing all or part of crossing length.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 15 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.3 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 1.8 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 457 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 3 tons/year
Right Approach
Length: 330 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.64 tons/year
Erosion Information
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, Mullein, knapweed.
Site Comments: Lots of beaver activity. Very braided channel downstream. Most of the issues identified in this inventorycan be attributed to culvert that was present prior to replacement. Scor pool has filled in and pondingis smaller than before.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.