Road Stream Crossing Site AB02
Alcona-Black River Watershed, Butternut Creek
US 23
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.8383732,-83.39002107
T 028N R 009 Sec 07
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 35.98 tons/year
Overall Score: 13
Severity: Minor
Date Inventoried: 10/5/2022
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: Square/Rectangle
Inlet Type: Wingwall 10 to 30 degrees
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Light superficial corrosion or abrasion or chipping or spalling or cracking. No shape changes (described above).
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 110 ft. Width 7.5 ft. Height 7.5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.5 ft./sec.
Structure Outlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured 0.3 ft. below the surface (via Flow Meter).
Stream Information
Stream Flow: < 1/2 Bankfull – The stream channel is less than half filled with water.
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: 0.7 ft.
Bankfull Width: 12.5 ft.
Wetted Width: 9.4 ft.
Water Velocity: 0.7 ft./sec. (measured via Flow Meter)
Dominant Substrate: Gravel – rocks between the size of a pinhead and a baseball
Road Information
Road Surface: Paved
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: 60 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 8 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 8 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 1000 ft.
Slope: > 10%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 17.99 tons/year
Right Approach
Length: 1000 ft.
Slope: > 10%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 17.99 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 35.98 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
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.