Road Stream Crossing Site AUS-CGAS09

Au Sable River Watershed, Wetland
W Lewiston Grade
Crawford County
Information collected by:
Huron Pines
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 - Left
Road Approach - Right
Road Approach - Right
Inlet
Inlet
Upstream Conditions
Upstream Conditions
Outlet
Outlet
Downstream Conditions
Downstream Conditions
Representative Reach
Representative Reach
Site Sketch
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.