Road Stream Crossing Site GTBAY_LEE082

West Bay Shoreline & Tributaries Watershed, Unnamed
Dalzell
Elmwood Twp, Leelanau County
Information collected by:
Site Location
GPS Coordinates: 44.8193471 , -85.66412154
T28N R11W Sec 17
Owned by Private
Fish Passability 0.5
Total Erosion: 0.2199 tons/year
Severity: Moderate
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: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
1
2 ft.
47.7 ft.
2 ft.
Metal
2
2 ft.
47.9 ft.
2 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 47.7 ft. , Width 2 ft. , Height 2 ft.
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.8 ft./sec.
*Water Velocities were measured 0.3 ft. below Surface (with Meter)
Additional Comments
Water depth and velocity recorded for culvert #2
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 7.1 ft.
Wetted Width: 4.2 ft.
Water Velocity: 0.8 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved Town Road
Road Condition: Fair
Road Width at Culvert: 22.5 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1.6 ft.
Slope: 1:2
Downstream
Fill Depth: 1.7 ft.
Slope: Less than 1:2
Approaches
Left Approach
Length: 25 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0009 tons/year
Right Approach
Length: 544.5 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.509
Erosion: 0.2061 tons/year
Erosion Information
Total Erosion at Crossing: 0.2199 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Upstream Embankment
2.4 ft.
1.6 ft.
1.5 ft.
yes
Sand
0.004
Right Upstream Embankment
2.3 ft.
1.4 ft.
3.5 ft.
yes
Sand
0.0089
Summary Information
Fish Passability 0.5