Road Stream Crossing Site EUP_PRW30
Pine River Watershed
W Sawyer Rd
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.2594986,-84.6922556
T 045N R 003 Sec 33
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 0.41 tons/year
Overall Score: 48
Severity: Severe
Date Inventoried: 5/11/2021
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: Other
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Major deterioration from corrosion or abrasion (10-50% of the length of structure is rusted through) or cracking or spalling or chipping (large chunks sloughing off, large cracks, exposed metal reinforcement). OR Major shape changes (described above) reducing the capacity of the structure by up to 50%. OR segment disconnection with evidence of water piping under or around the culvert.
Structure Interior: Other
Is Structure Rusted through? Yes
Dimensions of Structure: Length 30 ft. Width 2 ft. Height 2 ft.
Percentage Plugged: 81% - 100% Inside
Percentage Crushed: 81% - 100%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
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? Yes
Scour Pool: Length 9 ft., Width 9 ft., Depth 3.2 ft.
Is Upstream Ponding Present? Yes
Pond: Length 9.5 ft., Width 6 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 7 ft.
Wetted Width: 4 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: Federal
Road Condition: Old Pavement or Rutted, Minor cracking or rutting/ponding at crossing all or part of crossing length.
Road Core Integrity: Fair (some of the symptoms may be present, but not to an extent posing high risk to the crossing)
Road Width at Culvert: 10 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 2.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 120 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.13 tons/year
Right Approach
Length: 230 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.28 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.41 tons/year
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, Culvert is crushed and minimal flow is occuring.
Were any non-native species observerd at this site? No
Site Comments: Crushed culvert
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.