Road Stream Crossing Site EUP_PRW17
Pine River Watershed, Unnamed
FR 3137
Chippewa County
Information collected by:
Site Location
GPS Coordinates: 46.2469414,-84.7634202
T 045NN R 004W Sec 35
Fish Passability: Barrier
Perch Height: 1.2 ft.
Total Erosion: 2.56 tons/year
Overall Score: 52
Severity: Severe
Date Inventoried: 4/23/2021
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: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
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: Corrugated
Is Structure Rusted through? Yes
Dimensions of Structure: Length 36 ft. Width 3.8 ft. Height 4.2 ft.
Percentage Plugged: 61% - 80% Inlet
Percentage Crushed: None or 0%
Perch Height: 1.2 ft.
Structure Inlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.6 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.8 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 16 ft., Width 9 ft., Depth 0.6 ft.
Is Upstream Ponding Present? Yes
Pond: Length 12 ft., Width 10 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 5.5 ft.
Wetted Width: 2.6 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: Sand
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: 9 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 4.6 ft.
Slope: Steep, 1:1, 45°, or 100%
Downstream
Fill Depth: 5 ft.
Slope: Steep, 1:1, 45°, or 100%
Approaches
Left Approach
Length: 361 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 1.32 tons/year
Right Approach
Length: 457 ft.
Slope: 6-10%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.56 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 2.56 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) | ||
Right Downstream Embankment | 12 ft. | 1 ft. | 1 ft. | Yes | Gravelly Loam | Moderate (corrective actions recommended) | 0.02 |
Right Upstream Embankment2 | 7 ft. | 8 ft. | 4 ft. | Yes | Loam | Severe (corrective actions recommended) | 0.66 |
2Entire embankment slope eroding, from thr road edge to the culvert
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? Yes, Replace culvert and fix embankment.
Were any non-native species observerd at this site? No
Site Comments: Plugged culvert Embankment erosion
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.