Road Stream Crossing Site EUP_MRW24
Munuscong River Watershed, Taylor Creek
3 Mile Rd
Mackinac County
Information collected by:
Site Location
GPS Coordinates: 46.1003434,-84.4254498
T 043N R 001 Sec 27
Fish Passability: Barrier
Structure is NOT Perched
Total Erosion: 5.05 tons/year
Overall Score: 25
Severity: Severe
Date Inventoried: 8/5/2021
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: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: No deficiencies. New structure or nearly new condition.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 126 ft. Width 10 ft. Height 5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.7 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.1 ft./sec.
*Water Velocities were measured 0.2 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 18 ft., Width 15 ft., Depth 3 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1.4 ft.
Bankfull Width: 24 ft.
Wetted Width: 22 ft.
Water Velocity: 0.6 ft./sec. (measured via Flow Meter)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
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: 28 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 3.5 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 275 ft.
Slope: 1-5%
Vegetation: None, Ditch has been recently graded and is bare of vegetation.
Erosion Estimate: 1.41 tons/year
Right Approach
Length: 850 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 3.64 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 5.05 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? Yes, Wild parsnip, queen anne's lace, birds-foot trefoil, spotted knapweed.
Site Comments: Road. Newly replaced culvert but placed too high above streambed. Beaver dam upstream of culvert.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.