Road Stream Crossing Site PG011

Pigeon River Watershed, Inlet to Little Pigeon River
South Branch Trail
Koehler Twp, Cheboygan County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.41213 , -84.50853
T35N R02W Sec 2,3
Owned by State
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 1.2346 tons/year
7.25 Upstream Miles
Severity: Severe
Year Inventoried: 2012
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Other
Outlet Type: Other
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Structure Interior: corrugated
Dimensions of Structure: Length 16 ft. , Width 1.2 ft. , Height 1.2 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.6 ft./sec.
*Water Velocities were measured at the 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: 0.3 ft.
Bankfull Width: 4 ft.
Wetted Width: 15 ft.
Water Velocity: 0.1 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Sand Other Road (Seasonal)
Road Condition: Poor
Road Width at Culvert: 5 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.8 ft.
Slope: Vertical
Downstream
Fill Depth: 1.8 ft.
Slope: Vertical
Approaches
Left Approach
Length: 200 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 3.005
Erosion: 0.8278 tons/year
Right Approach
Length: 230 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.284
Erosion: 0.4068 tons/year
Erosion Information
Total Erosion at Crossing: 1.2346 tons/year
Extent of Erosion: Very Severe
Notes: Culvert has collapsted, lots of sediment entering the stream.
Summary Information
Fish Passability 0.5
7.25 Upstream Miles
Erosion is an area of concern for this site. Culvert is crushed, blocked and off center. Likely from bad erosion and falling in.
A future visit to this site is recommended. Terrible condition of the crossing, it is impassible. People have put pallets to try and make is across on atv's.