Road Stream Crossing Site EUP_CRW_BC02
Carp River Watershed
FR 3332
Mackinac County
Information collected by:
Site Location
GPS Coordinates: 46.0932559,-84.9389094
T 043N R 005 Sec 28
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 0.31 tons/year
Overall Score: 19
Severity: Moderate
Date Inventoried: 4/2/2021
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: Apron
Outlet Type: Outlet Apron
Structure Material: Metal
Structure Substrate: None
General Conditions: Not new, but no noticeable corrosion, abrasion, chipping, spalling, or cracking. No shape changes such as barrel distortion (bowing, bending, warping), bulging, inlet or outlet damaged.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 54 ft. Width 5 ft. Height 3.6 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 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.1 ft./sec.
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? Yes
Scour Pool: Length 20.3 ft., Width 18 ft., Depth 2.2 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 1.1 ft.
Bankfull Width: 11.3 ft.
Wetted Width: 9.7 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: Federal
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: 17.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.9 ft.
Slope: Gentle, 3:1, 15°, or 33%
Downstream
Fill Depth: 2.9 ft.
Slope: Gentle, 3:1, 15°, or 33%
Approaches
Left Approach
Length: 300 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.07 tons/year
Right Approach
Length: 1000 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.24 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.31 tons/year
Summary Information
Fish Passability: Barrier at Most Flows
Is a future visit to this site recommended? No
Were any non-native species observerd at this site? No
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.