Road Stream Crossing Site PLT-P-11

Platte River Watershed
Skinner Rd
Platte Twp, Benzie County
Information collected by:
Site Location
GPS Coordinates: 44.72658 , -86.00865
T27N R14W Sec 21
Owned by Private
Structure is NOT Perched
Total Erosion: 0.7025 tons/year
Severity: Restored
Year Inventoried: 2015
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Open Bottom Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: New
Structure Interior: corrugated
, Width 5.5 ft. , Height 3 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 4.5 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 0.9 ft./sec.
*Water Velocities were measured 0.5 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 0.9 ft.
Bankfull Width: 3.5 ft.
Wetted Width: 2.5 ft.
Water Velocity: 1.2 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Native Surface County Road (Seasonal)
Road Condition: Good
Road Width at Culvert: 10 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0.2 ft.
Slope: More than 1:2
Fill Depth: 0.2 ft.
Slope: More than 1:2
Left Approach
Length: 100 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0138 tons/year
Right Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.5
Erosion: 0.6887 tons/year
Erosion Information
Total Erosion at Crossing: 0.7025 tons/year
Extent of Erosion: Stabilized
Summary Information