Road Stream Crossing Site GTBAY_LEE090
West Bay Shoreline & Tributaries Watershed, Unnamed
Avondale
Elmwood Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 44.79542281
, -85.65007556
T28N
R11W
Sec 28
Owned by Local Government
Private
Private
Fish Passability 0.5
Total Erosion: 0.1749 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: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 48.4 ft.
, Width 1.8 ft.
, Height 1.9 ft.
Structure Inlet
Water Depth: 0.65 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 2.1 ft./sec.
Structure Outlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 2.4 ft./sec.
*Water Velocities were measured 0.4 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 12.3 ft.
, Width 6.9 ft.
, Depth 0.5 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 5.1 ft.
Wetted Width: 4.2 ft.
Water Velocity: 0.7 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
Town Road
Road Condition: Good
Road Width at Culvert: 36.5 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.9 ft.
Slope: Vertical
Downstream
Fill Depth: 2.1 ft.
Slope: Vertical
Approaches
Left Approach
Length: 25 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0.0015 tons/year
Right Approach
Length: 49.5 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.319
Erosion: 0.019 tons/year
Erosion Information
Total Erosion at Crossing: 0.1749 tons/year
Extent of Erosion: 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) | |
Right Upstream Embankment |
2.7 ft. |
3 ft. |
2.6 ft. |
yes |
Sand |
0.1544 |
Summary Information
Fish Passability 0.5
Erosion is an area of concern for this site.
Drainage from road causing lots of erosion