Road Stream Crossing Site GTBAY_LEE044
West Bay Shoreline & Tributaries Watershed, Weaver Creek
M-22
Leelanau Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 45.04712935
, -85.59404086
T31N
R11W
Sec 35
Owned by Private
Fish Passability 0
Perch Height: 2.4 ft.
Total Erosion: 2.0218 tons/year
Severity: Severe
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: Ellipse
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 127 ft.
, Width 5.8 ft.
, Height 3.6 ft.
Perch Height: 2.4 ft.
Structure Inlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.3 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4 ft./sec.
*Water Velocities were measured 0.1 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 17.1 ft.
, Width 14.1 ft.
, Depth 2.7 ft.
Riffle Information
Water Depth: 0.1 ft.
Bankfull Width: 28.7 ft.
Wetted Width: 9.7 ft.
Water Velocity: 0.6 ft./sec.
Dominant Substrate: Gravel
Road Information
Paved
State Road
Road Condition: Fair
Road Width at Culvert: 28.6 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 5.95 ft.
Slope: 1:1
Downstream
Fill Depth: 6.4 ft.
Slope: 1:1
Approaches
Left Approach
Length: 792 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.549
Erosion: 0.4109 tons/year
Right Approach
Length: 50 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0024 tons/year
Erosion Information
Total Erosion at Crossing: 2.0218 tons/year
Extent of Erosion: Very Severe
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 Downstream Embankment |
8.7 ft. |
8.9 ft. |
4.9 ft. |
yes |
Sand |
1.1723 |
Right Downstream Embankment |
6.1 ft. |
4.4 ft. |
2.6 ft. |
yes |
Sand |
0.4362 |
Summary Information
Fish Passability 0
Erosion is an area of concern for this site.
Major downstream erosion