Road Stream Crossing Site EUP_PRW24
Pine River Watershed
FR 3113
Mackinac County
Information collected by:
Site Location
GPS Coordinates: 46.1232154,-84.6968703
T 043N R 003 Sec 16
Fish Passability: Barrier
Perch Height: 0.7 ft.
Total Erosion: 1.88 tons/year
Overall Score: 21
Severity: Severe
Date Inventoried: 4/29/2021
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: Round
Inlet Type: Apron
Outlet Type: Freefall into Pool
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 60 ft. Width 4 ft. Height 4 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Perch Height: 0.7 ft.
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.4 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.8 ft./sec.
*Water Velocities were measured 0.1 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 14 ft., Width 9 ft., Depth 0.4 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 7.5 ft.
Wetted Width: 3.6 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: Gravel
Owner: Federal
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: 27 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3.8 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 3.8 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 484 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.79 tons/year
Right Approach
Length: 240 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.09 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.88 tons/year
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Spotted knapweed.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.