Road Stream Crossing Site EUP_North Rutledge Road
Munuscong River Watershed, Unnamed
North Rutledge Road
Mackinac County
Information collected by:
CLMCD
Site Location
GPS Coordinates: 46.1440479,-84.4050221
T 43NN R 01W Sec 11
Owned by Richard Hanna
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 0.94 tons/year
Overall Score: 48
Severity: Severe
Date Inventoried: 8/24/2021
Road Approach - Left
Road Approach - Right
Inlet
Upstream Conditions
Outlet
Downstream Conditions
Representative Reach
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Rock
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 40.5 ft. Width 9.6 ft. Height 6.9 ft.
Percentage Plugged: 21% - 40% Inside
Percentage Crushed: 1% - 20%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
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? No
Is Upstream Ponding Present? Yes
Pond: Length 13 ft., Width 18 ft.
Riffle Information
Water Depth: 1.8 ft.
Bankfull Width: 17 ft.
Wetted Width: 15 ft.
Dominant Substrate: Clay – very fine particles that stick together
Road Information
Road Surface: Gravel
Owner: County
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: 16.8 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3.5 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 3 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 350 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.76 tons/year
Right Approach
Length: 100 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.18 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.94 tons/year
Summary Information
Fish Passability: Barrier
Is a future visit to this site recommended? Yes, replace culvert. risk to road failure and sedimentation.
Were any non-native species observerd at this site? Yes, trefoil, queen annes lace.
Site Comments: perched culvert
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.