Road Stream Crossing Site EUP_PRW07
Pine River Watershed
S Tromblay Rd
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.2298592,-84.6346868
T 044N R 003 Sec 11
Owned by One private landowner
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 17.85 tons/year
Overall Score: 30
Severity: Severe
Date Inventoried: 4/13/2021
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: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Plastic
Structure Substrate: None
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Dimensions of Structure: Length 120 ft. Width 5 ft. Height 5 ft.
Percentage Plugged: 21% - 40% Inlet
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.8 ft./sec.
Structure Outlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured 1.1 ft. below the surface (via Flow Meter).
Additional Comments
Looks relatively new. Silt fences still visible
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 20 ft., Width 13 ft., Depth 3 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 12 ft.
Wetted Width: 5 ft.
Water Velocity: 0.3 ft./sec. (measured via Flow Meter)
Dominant Substrate: Clay – very fine particles that stick together
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: 26 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 13 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 15 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 245 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.77 tons/year
Right Approach
Length: 534 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 17.08 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 17.85 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, Thistle, knapweed, mullein.
Site Comments: New culvert, inlet plugged causing high velocity at inlet
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.