Road Stream Crossing Site AUS_OS158
Au Sable River Watershed, Perry Creek
Helmer Lake Rd
Comins Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.7394661902898,-84.08321
T Comins TwpN R 03E Sec 9,16
Owned by Private
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 0.4 tons/year
Overall Score: 8
Severity: Minor
Date Inventoried: 4/15/2022
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: Sand
General Conditions: Not new, but no noticeable corrosion, abrasion, chipping, spalling, or cracking. No shape changes such as barrel distortion (bowing, bending, warping), bulging, inlet or outlet damaged.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 60 ft. Width 4 ft. Height 4 ft.
Percentage Plugged: 1% - 20% Inlet
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.7 ft./sec.
Structure Outlet
Water Depth: 2.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.4 ft./sec.
*Water Velocities were measured 2 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: = Bankfull – Water has completely filled the stream channel, but is not 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 30 ft., Width 30 ft.
Riffle Information
Water Depth: 1.5 ft.
Bankfull Width: 3.6 ft.
Wetted Width: 3.6 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: 21 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3.7 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 3.7 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
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: 1000 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.4 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.4 tons/year
Summary Information
Fish Passability: Not a Barrier
Is a future visit to this site recommended? No, No, because there is no erosion or fish barriers.
Were any non-native species observerd at this site? No
Site Comments: Wetland upstream
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.