Road Stream Crossing Site EUP_6336742766
Carp River Watershed, Bissel Creek
St ignace to trout creek trl
Mackinac County
Information collected by:
Superior Watershed Partnership
Site Location
GPS Coordinates: 46.079561846,-84.918334074
T 043NN R 005W Sec 34
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 1.51 tons/year
Date Inventoried: 6/11/2020
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: Sand
General Conditions: Major deterioration from corrosion or abrasion (5-10% of the structure is rusted through) or cracking or spalling or chipping (medium sized cracks, widespread chipping, exposed metal reinforcement). OR Major shape changes (described above) reducing the capacity of the structure by less than 30%. OR segment disconnection (segments of concrete or metal culvert disconnecting internally) but no evidence of water piping.
Structure Interior: Corrugated
Is Structure Rusted through? No
Dimensions of Structure: Length 42 ft. Width 5 ft. Height 5 ft.
Percentage Plugged: 41% - 60%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 3.5 ft.
Embedded Depth of Structure: 2.5 ft.
Water Velocity*: 1.7 ft./sec.
Structure Outlet
Water Depth: 3 ft.
Embedded Depth of Structure: 1 ft.
Water Velocity*: 1.7 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
Additional Comments
Culvert failing and being replaced May 2023. -kjk
Stream Information
Stream Flow: = Bankfull – Water has completely filled the stream channel, but is not flowing onto the floodplain.
Stream Flow Type: Perennial (if flowing during the time of assessment.)
Is Scour Pool Present? Yes
Scour Pool: Length 30 ft., Width 24 ft., Depth 4 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0 ft.
Bankfull Width: 0 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec.
Road Information
Road Surface: Gravel
Owner: State
Manager: DNR Parks Division
Road Condition: New Pavement or Well Graded, Same condition as initial placement.
Road Width at Culvert: 11 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 7 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 6 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 0 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Right Approach
Length: 0 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 1.51 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 Downstream Embankment | 5 ft. | 3.5 ft. | 4.5 ft. | Yes | Sandy Loam | Severe (corrective actions recommended) | 1.51 |
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, Erosion present and blocked inlet and tree roots encroaching on outlet.
Were any non-native species observerd at this site? No
Site Comments: Above
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.