Road Stream Crossing Site AB36
Alcona-Black River Watershed, Black River
Trask Lake Rd
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.6851987,-83.3554414
T 027N R 009 Sec 33
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 2.83 tons/year
Overall Score: 36
Severity: Severe
Date Inventoried: 4/13/2022
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Other
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Pipe Arch
Inlet Type: Mitered
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Gravel
General Conditions: Light superficial corrosion or abrasion or chipping or spalling or cracking. No shape changes (described above).
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 54 ft. Width 5 ft. Height 4 ft.
Percentage Plugged: 81% - 100% Outlet
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured 4.8 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: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 9 ft.
Wetted Width: 7.9 ft.
Water Velocity: 0.6 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: 18 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 2 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 1000 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 2.83 tons/year
Right Approach
Length: 0 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 2.83 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: Road fill entering stream. Changed to Barrier due to beaver dam.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.