Road Stream Crossing Site AUS-CGAS09
Au Sable River Watershed, Wetland
W Lewiston Grade
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.723188,-84.670113
T 027N R 003 Sec 21
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 0.28 tons/year
Overall Score: 10
Severity: Minor
Date Inventoried: 5/31/2022
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: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Plastic
Structure Substrate: Mixture
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.
Additional (Multiple) Structures | ||||
Structure | Width | Length | Height | Material |
1 | 1.5 ft. | 30 ft. | 1.5 ft. | Plastic |
2 | 1.5 ft. | 30 ft. | 1.5 ft. | Plastic |
Is Structure Rusted through? No
Dimensions of Structure: Length 30 ft. Width 1.5 ft. Height 1.5 ft.
Percentage Plugged: 61% - 80% Inlet
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured 0.8 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: Concentrated Wetland Flow.
Is Scour Pool Present? No
Is Upstream Ponding Present? Yes
Pond: Length 30 ft., Width 30 ft.
Riffle Information
Water Depth: 0.4 ft.
Bankfull Width: 3 ft.
Wetted Width: 3 ft.
Water Velocity: 0.1 ft./sec. (measured via Flow Meter)
Dominant Substrate: Organics – decomposing plant material
Road Information
Road Surface: Sand
Owner: State
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: 20.2 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.2 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 2.1 ft.
Slope: Gentle, 3:1, 15°, or 33%
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: 0.28 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.28 tons/year
Summary Information
Fish Passability: Not a Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? No
Site Comments: Beaver Activity. Wetland.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.