Road Stream Crossing Site EUP_WRW12
Waishkey River Watershed, South Branch East Branch Waiska River
W 11 Mile Rd
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.3461399,-84.4521081
T 046N R 001 Sec 29
Fish Passability: Barrier
Perch Height: 0.5 ft.
Total Erosion: 1.67 tons/year
Overall Score: 33
Severity: Severe
Date Inventoried: 8/25/2021
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: Projecting
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: None
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: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 50 ft. Width 4 ft. Height 4 ft.
Percentage Plugged: 1% - 20% Outlet
Percentage Crushed: 41% - 60%
Perch Height: 0.5 ft.
Structure Inlet
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.2 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.6 ft./sec.
*Water Velocities were measured 0.1 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? Yes
Scour Pool: Length 30 ft., Width 30 ft., Depth 3 ft.
Is Upstream Ponding Present? Yes
Pond: Length 25 ft., Width 8 ft.
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 7 ft.
Wetted Width: 3.2 ft.
Water Velocity: 0.1 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: Good (no symptoms of lack of integrity)
Road Width at Culvert: 18 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 12 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 13 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 250 ft.
Slope: 1-5%
Vegetation: Partial, Ditch has some vegetation and some bare, eroding places.
Erosion Estimate: 0.64 tons/year
Right Approach
Length: 300 ft.
Slope: 1-5%
Erosion Estimate: 1.03 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.67 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? No
Site Comments: clogged and disconnected culvert with piping on inlet.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.