Road Stream Crossing Site GTBAY_LEE047
West Bay Shoreline & Tributaries Watershed, Unnamed
M-22
Suttons Bay Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 45.00125217
, -85.63305569
T30N
R11W
Sec 15
Owned by Private
Fish Passability 0.9
Total Erosion: 0.0729 tons/year
Severity: Minor
Year Inventoried: 2020
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: Open Bottom Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 45.6 ft.
, Width 3.8 ft.
, Height 2.2 ft.
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.8 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.2 ft./sec.
*Water Velocities were measured 0.1 ft. below Surface
(with Meter)
Additional Comments
Man-made downstream channel
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 8 ft.
Wetted Width: 2.6 ft.
Water Velocity: 5 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
State Road
Road Condition: Fair
Road Width at Culvert: 36 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.5 ft.
Slope: 1:1.5
Downstream
Fill Depth: 1.6 ft.
Slope: Vertical
Approaches
Left Approach
Length: 150 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.4
Erosion: 0.0714 tons/year
Right Approach
Length: 25 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0.0015 tons/year
Erosion Information
Total Erosion at Crossing: 0.0729 tons/year
Summary Information
Fish Passability 0.9