Road Stream Crossing Site EUP_42N3W17_001
Carp River Watershed, Platz Creek
Carp River Road (FR 3308)
Mackinac County
Information collected by:
USFS
Site Location
GPS Coordinates: 46.0404300000001,-84.71602
T 042NN R 003W Sec 17
Owned by Federal
Fish Passability: Barrier at High Flows
Structure is NOT Perched
Total Erosion: 0.28 tons/year
Overall Score: 25
Severity: Moderate
Date Inventoried: 6/20/2016
Crossing Information*
Type of Crossing: Culvert(s)
Number of Structures: 2
Structure Shape: Round
Inlet Type: Mitered
Outlet Type: At Stream Grade
Structure Material: Concrete
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.
Additional (Multiple) Structures | ||||
Structure | Width | Length | Height | Material |
2 | 5 ft. | 40 ft. | 5 ft. | Concrete |
Structure Interior: Smooth
Is Structure Rusted through? No
Dimensions of Structure: Length 40 ft. Width 5 ft. Height 5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.35 ft./sec.
Structure Outlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.35 ft./sec.
*Water Velocities were measured at the surface (via Float Test).
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 28 ft., Width 23 ft., Depth 2.8 ft.
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.4 ft.
Bankfull Width: 13.5 ft.
Wetted Width: 9.5 ft.
Water Velocity: 0.89 ft./sec. (measured via Float Test)
Dominant Substrate: Sand – particles are smaller than a pinhead and feel gritty between fingers
Road Information
Road Surface: Gravel
Owner: Federal
Road Condition: Old Pavement or Rutted, Minor cracking or rutting/ponding at crossing all or part of crossing length.
Road Core Integrity: Good (no symptoms of lack of integrity)
Road Width at Culvert: 13.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3.1 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Downstream
Fill Depth: 3.4 ft.
Slope: Moderate, 2:1, 22.5°, or 41%
Approaches
Left Approach
Length: 100 ft.
Slope: 1-5%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.14 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: 0.14 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.28 tons/year
Summary Information
Fish Passability: Barrier at High Flows
Is a future visit to this site recommended? Yes, Undersized and Misaligned.
Were any non-native species observerd at this site? Yes, Spotted Knapweed.
Site Comments: High spring runoff, potentially backed up by Carp River in high flows. Large sediment wedge on upstream right side.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.