Road Stream Crossing Site EBIO052
Au Gres River Watershed, Smith Creek
Webb Rd
Plainfield Twp,
Iosco County
Information collected by:
Site Location
GPS Coordinates: 44.3925695309178,-83.7754903251266
T 023N R 005 Sec 12
Fish Passability: Potential Behavioral Barrier
Structure is NOT Perched
Total Erosion: 3.5 tons/year
Overall Score: 7
Severity: Minor
Date Inventoried: 4/14/2022
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: Native Bottom Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
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 58 ft. Width 16 ft. Height 5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.2 ft./sec.
Structure Outlet
Water Depth: 2.9 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1 ft./sec.
*Water Velocities were measured 1.2 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 5 ft., Width 20 ft.
Riffle Information
Water Depth: 2.2 ft.
Bankfull Width: 13.4 ft.
Wetted Width: 13.4 ft.
Water Velocity: 0.9 ft./sec. (measured via Flow Meter)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
Road Information
Road Surface: Gravel
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: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.7 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 1.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 250 ft.
Slope: 6-10%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 2.34 tons/year
Right Approach
Length: 350 ft.
Slope: 6-10%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 1.16 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 3.5 tons/year
Summary Information
Fish Passability: Potential Behavioral Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? No
Site Comments: Unknown cause of ponding. Changed to not a barrier, measurements taken at bankfull elevation. Flow at the outlet, inlet and rep reach remained consistent.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.