Road Stream Crossing Site GTBAY_LEE087

West Bay Shoreline & Tributaries Watershed, Cedar Creek
Cherry Bend Rd
Elmwood Twp, Leelanau County
Information collected by:
Site Location
GPS Coordinates: 44.802241 , -85.651276
T28N R11W Sec 28
Owned by Private
Fish Passability 1
Total Erosion: 0.9901 tons/year
Severity: Moderate
Year Inventoried: 2020
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 36.1 ft. , Width 5.8 ft. , Height 3.2 ft.
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.6 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.2 ft./sec.
*Water Velocities were measured 0.3 ft. below Surface (with Meter)
Additional Comments
High structure velocities consistent with riffle velocity. Possible velocimeter error. Based on double check, change velocites to Inlet: 1.6 ft/sec, Outlet: 1.2. change to moderate.
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 15.4 ft.
Wetted Width: 7.8 ft.
Water Velocity: 5.2 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 31.2 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.2 ft.
Slope: 1:1
Downstream
Fill Depth: 2.4 ft.
Slope: Vertical
Approaches
Left Approach
Length: 897.6 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.774
Erosion: 0.7169 tons/year
Right Approach
Length: 432.2 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.613
Erosion: 0.2732 tons/year
Erosion Information
Total Erosion at Crossing: 0.9901 tons/year
Extent of Erosion: Moderate
Summary Information
Fish Passability 1
Erosion is an area of concern for this site.