Road Stream Crossing Site GTBAY_LEE102
West Bay Shoreline & Tributaries Watershed, Ennis Creek
Across from Lee Mann Rd
Leelanau Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 45.10019786
, -85.60373001
T31N
R11W
Sec 11
Owned by Private
Fish Passability 0.5
Total Erosion: 0.1251 tons/year
Severity: Moderate
Year Inventoried: 2020
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Ellipse
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Fair
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
3.5 ft. |
40 ft. |
2.4 ft. |
Metal |
2 |
3.5 ft. |
40 ft. |
2.4 ft. |
Metal |
Structure Interior: corrugated
Dimensions of Structure: Length 40 ft.
, Width 3.5 ft.
, Height 2.4 ft.
Structure Inlet
Water Depth: 0.35 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.7 ft./sec.
Structure Outlet
Water Depth: 0.25 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.1 ft./sec.
*Water Velocities were measured 0.125 ft. below Surface
(with Meter)
Additional Comments
Bank owned development
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 12.6 ft.
Wetted Width: 7.4 ft.
Water Velocity: 2.7 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Sand
Private Road
Road Condition: Fair
Road Width at Culvert: 6.7 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.3 ft.
Slope: Less than 1:2
Downstream
Fill Depth: 1.3 ft.
Slope: Less than 1:2
Approaches
Left Approach
Length: 99 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.379
Erosion: 0.0693 tons/year
Right Approach
Length: 62.7 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.345
Erosion: 0.04 tons/year
Erosion Information
Total Erosion at Crossing: 0.1251 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 |
2.5 ft. |
2.4 ft. |
3.9 ft. |
yes |
Sandy Loam |
0.0094 |
Right Upstream Embankment |
3.1 ft. |
2.3 ft. |
2.2 ft. |
yes |
Sandy Loam |
0.0065 |
Summary Information
Fish Passability 0.5
Erosion is an area of concern for this site.
Minor erosion upstream