Road Stream Crossing Site AUS_AL017
Au Sable River Watershed, Wilbur Creek
Brodie Rd
Curtis Twp,
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.5628082,-83.8466432
T 025N R 005 Sec 16
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 1.53 tons/year
Overall Score: 11
Severity: Minor
Date Inventoried: 4/14/2022
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: Mitered
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 90 ft. Width 11 ft. Height 8 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 1.1 ft./sec.
Structure Outlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 0.6 ft./sec.
*Water Velocities were measured 2.4 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < Bankfull – The stream channel is more than half filled with water, but is not full.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1.7 ft.
Bankfull Width: 13.2 ft.
Wetted Width: 12 ft.
Water Velocity: 0.6 ft./sec. (measured via Flow Meter)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
Road Information
Road Surface: Paved
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: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 3.5 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 700 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.24 tons/year
Right Approach
Length: 1000 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.29 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.53 tons/year
Summary Information
Fish Passability: Not a Barrier
Is a future visit to this site recommended? Yes, Beaver fell trees on thepowerline.
Were any non-native species observerd at this site? No
Site Comments: Beaver dam downstream of culvert recently washed out
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.