Road Stream Crossing Site EUP_42N5W11_001
Carp River Watershed, Unnamed Tributary to Carp River
Carp Lake to St. Ignace Trail
Mackinac County
Information collected by:
USFS
Site Location
GPS Coordinates: 46.0517090000001,-84.8890269999999
T 042NN R 005W Sec 11
Owned by Federal
Fish Passability: Barrier at Most Flows
Structure is NOT Perched
Total Erosion: 0.04 tons/year
Overall Score: 12
Severity: Minor
Date Inventoried: 7/13/2016
Crossing Information*
Type of Crossing: Bridge
Number of Structures: 1
Structure Shape: Square/Rectangle
Inlet Type: Other
Outlet Type: Other
Structure Material: Wood
Structure Substrate: Mixture
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: Other
Is Structure Rusted through? No
Dimensions of Structure: Length 16 ft. Width 13.3 ft. Height 8.5 ft.
Percentage Plugged: None or 0%
Percentage Crushed: None or 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 2 ft.
Water Velocity*: 0 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? No
Is Upstream Ponding Present? No
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 12 ft.
Wetted Width: 6.5 ft.
Water Velocity: 0 ft./sec. (measured via Float Test)
Dominant Substrate: Organics – decomposing plant material
Road Information
Road Surface: Gravel
Owner: State
Manager: DNR Parks Division
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: 12.1 ft.
Location of Low Point: Other
Runoff Path: Roadway
Approaches
Left Approach
Length: 100 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.02 tons/year
Right Approach
Length: 100 ft.
Slope: < 1%
Vegetation: Heavy, Ditch is fully vegetated or rip-rapped with no signs of erosion.
Erosion Estimate: 0.02 tons/year
Erosion Information
Estimate of Total Erosion at Crossing: 0.04 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? Yes, Spotted Knapweed, Oxeye Daisy, St. Johns Wort.
*These data are maintained in the Michigan DNR Road Stream Crossing Inventory.