Road Stream Crossing Site EUP_CHRW68
Charlotte River Watershed, Frechette Creek
S Ridge Rd
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.4542876,-84.3009779
T 047N R 001 Sec 21
Fish Passability: Barrier
Perch Height: 0.7 ft.
Total Erosion: 24.25 tons/year
Overall Score: 33
Severity: Severe
Date Inventoried: 8/24/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Other
Site Sketch
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Ellipse
Inlet Type: Projecting
Outlet Type: At Stream Grade
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: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 74.5 ft. Width 6.5 ft. Height 6 ft.
Percentage Plugged: None or 0%
Percentage Crushed: 1% - 20%
Perch Height: 0.7 ft.
Structure Inlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.2 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 25 ft., Width 12 ft., Depth 0.6 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0 ft.
Bankfull Width: 0 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec. (measured via Flow Meter)
Dominant Substrate: Clay – very fine particles that stick together
Road Information
Road Surface: Paved
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: 22 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 10 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 10 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 800 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.32 tons/year
Right Approach
Length: 1000 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.41 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 24.25 tons/year
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Extent of Erosion | Estimated Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | ||
Right Downstream Streambank | 35 ft. | 15 ft. | 16 ft. | Yes | Clay | Severe | 23.52 |
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Wild parsnip, wild carrot.
Site Comments: Representative reach not taken due to beaver dam immediately upstream of inlet. Downstream innaccessible due to debris, steep banks, and private property. Downstream is very scoured and there is major erosion downsream of outlet.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.