Road Stream Crossing Site PIGN_PR39
Pigeon River Watershed, Unnamed
Webber Rd
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.2761768,-84.4566379
T 033N R 001 Sec 05
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 0.72 tons/year
Overall Score: 16
Severity: Moderate
Date Inventoried: 10/8/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Light superficial corrosion or abrasion or chipping or spalling or cracking. No shape changes (described above).
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 26 ft. Width 2 ft. Height 2 ft.
Percentage Plugged: 1% - 20% Inlet
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0.4 ft.
Water Velocity*: 0.4 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 0.5 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? Yes
Scour Pool: Length 8 ft., Width 6 ft., Depth 0.9 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 5 ft.
Wetted Width: 3.5 ft.
Water Velocity: 0.1 ft./sec. (measured via Flow Meter)
Dominant Substrate: Organics – decomposing plant material
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: 19 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 1.3 ft.
Slope: Vertical, 0:1, or 90°
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: 0.72 tons/year
Right Approach
Length: 0 ft.
Slope: 1-5%
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: 0.72 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, White sweet clover.
Site Comments: Road
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.