Road Stream Crossing Site EUP_CHRW20
Charlotte River Watershed, Unnamed
S. Ridge Road
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.3762293,-84.3009236
T 046N R 001 Sec 21
Fish Passability: Not a Barrier
Structure is NOT Perched
Total Erosion: 0.56 tons/year
Overall Score: 17
Severity: Moderate
Date Inventoried: 6/22/2021
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: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Moderate to major deterioration from corrosion or abrasion (less than 5% of the structure has small holes or is nearly rusted through) or cracking or spalling or chipping (several small cracks or moderate chipping in the concrete). OR Moderate shape changes (described above).
Additional (Multiple) Structures | ||||
Structure | Width | Length | Height | Material |
1 | 3.5 ft. | 30 ft. | 3 ft. | Metal |
2 | 4 ft. | 30 ft. | 4 ft. | Metal |
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 30 ft. Width 3 ft. Height 3.5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 1.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
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? No
Is Upstream Ponding Present? Yes
Pond: Length 5 ft., Width 5 ft.
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 6 ft.
Wetted Width: 3 ft.
Water Velocity: 0 ft./sec. (measured via Float Test)
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: Fair (some of the symptoms may be present, but not to an extent posing high risk to the crossing)
Road Width at Culvert: 13 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3.2 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 2.5 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 50 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.06 tons/year
Right Approach
Length: 300 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.49 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.56 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) | ||
Left Upstream Embankment | 2 ft. | 2 ft. | 2.5 ft. | Yes | Gravel | Minor (corrective actions recommended) | 0.01 |
Summary Information
Fish Passability: Not a Barrier
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? Yes, Reed canary grass, birds-foot trefoil, thistle.
Site Comments: Unknown
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.