Road Stream Crossing Site EUP_PRW12
Pine River Watershed, Unnamed
Chub Creek Road
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.1666918,-84.6343821
T 044N R 003 Sec 35
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 1.9 tons/year
Overall Score: 31
Severity: Severe
Date Inventoried: 4/14/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Other
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: Concrete
Structure Substrate: Mixture
General Conditions: Severe deterioration from corrosion or abrasion (more than 50% of the structure is rusted through) or cracking or spalling or chipping (more than 50% of the structure is compromised). Or Major shape changes (described above) reducing the capacity of the structure by greater than 50%. OR Segment disconnect causing major subsurface erosion/piping and/or partial fill failure and/or sink holes in the fill.
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 44 ft. Width 2.5 ft. Height 2.5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: 21% - 40%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.1 ft./sec.
Structure Outlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.9 ft./sec.
*Water Velocities were measured 0.6 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 20 ft., Width 8 ft., Depth 2.2 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 3.5 ft.
Wetted Width: 2.8 ft.
Water Velocity: 0.6 ft./sec. (measured via Flow Meter)
Dominant Substrate: Silt – very fine particles that don't stick together
Road Information
Road Surface: Gravel
Owner: County
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Core Integrity: Poor (one or more symptoms are present and are compromising the integrity of the crossing)
Road Width at Culvert: 15 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 5 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 6 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 240 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.43 tons/year
Right Approach
Length: 265 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.47 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.9 tons/year
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, Replace culvert. Culvert is failing. Segments disconnected. Severe erosion on top of culvert. Might start eroding road soon.
Were any non-native species observerd at this site? No
Site Comments: Not priority for fish passage but the culvert should be replaced.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.