Road Stream Crossing Site AB30
Alcona-Black River Watershed, Black River
Beaton Rd
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.7289634,-83.3312938
T 027N R 009 Sec 15
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 35.02 tons/year
Overall Score: 22
Severity: Moderate
Date Inventoried: 4/13/2022
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: Pipe Arch
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
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 41 ft. Width 11 ft. Height 7.5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 2.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.7 ft./sec.
Structure Outlet
Water Depth: 1.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.4 ft./sec.
*Water Velocities were measured 2 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < Bankfull – The stream channel is more than half filled with water, but is not full.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? Yes
Scour Pool: Length 50 ft., Width 40 ft., Depth 5 ft.
Is Upstream Ponding Present? Yes
Pond: Length 20 ft., Width 20 ft.
Riffle Information
Water Depth: 3.1 ft.
Bankfull Width: 16 ft.
Wetted Width: 15 ft.
Water Velocity: 1.2 ft./sec. (measured via Flow Meter)
Dominant Substrate: Organics – decomposing plant material
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: 31 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.1 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 1.2 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 1000 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 17.51 tons/year
Right Approach
Length: 1000 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 17.51 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 35.02 tons/year
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Spotted knapweed.
Site Comments: Poor alignment, beaver activity downstream, landowner said he has caught steelhead in this stretch of river before.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.