Road Stream Crossing Site AUS_OS156
Au Sable River Watershed, Joshlin Creek
Perry Creek Rd
Comins Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.72241,-84.0910699999999
T Comins TwpN R 03E Sec 20,21
Owned by Private
Fish Passability: Barrier
Perch Height: 0.5 ft.
Total Erosion: 0.33 tons/year
Overall Score: 30
Severity: Severe
Date Inventoried: 4/15/2022
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Representative Reach
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Pipe Arch
Inlet Type: Projecting
Outlet Type: Freefall into Pool
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 70 ft. Width 6 ft. Height 4 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Perch Height: 0.5 ft.
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.9 ft./sec.
Structure Outlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.6 ft./sec.
*Water Velocities were measured 0.2 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 6 ft., Width 8 ft., Depth 0.9 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 7.4 ft.
Wetted Width: 5.2 ft.
Water Velocity: 1.3 ft./sec. (measured via Flow Meter)
Dominant Substrate: Gravel – rocks between the size of a pinhead and a baseball
Road Information
Road Surface: Paved
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: 25 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3.7 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 3.7 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 380 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.15 tons/year
Right Approach
Length: 450 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.18 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.33 tons/year
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? Yes, Site visit needed to assess next steps.
Were any non-native species observerd at this site? No
Site Comments: Culvert was not buried enough.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.