Road Stream Crossing Site GTBAY_LEE057

West Bay Shoreline & Tributaries Watershed, Unnamed
Davis Rd
Leelanau Twp, Leelanau County
Information collected by:
Site Location
GPS Coordinates: 45.076793823 , -85.600573719
T31N R11W Sec 23
Owned by Private
Perch Height: 1.6 ft.
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: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 17.9 ft. , Width 2.2 ft. , Height 2.2 ft.
Perch Height: 1.6 ft.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface
Stream Information
Stream Flow: None
Scour Pool: Length 8.7 ft. , Width 7.1 ft. , Depth 1.2 ft.
Road Information
Gravel County Road (Seasonal)
Road Condition: Fair
Road Width at Culvert: 8.7 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3.5 ft.
Slope: Vertical
Downstream
Fill Depth: 2.8 ft.
Slope: Vertical
Length: 236.8 ft.
Slope: 6% to 10%
Vegetation: Heavy
Length: 455.4 ft.
Slope: > 10%
Vegetation: Heavy
Erosion Information
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)
Left Downstream Embankment
3.3 ft.
4.6 ft.
5.6 ft.
yes
Sand
Right Downstream Embankment
4.6 ft.
2.2 ft.
5.6 ft.
yes
Sand
Left Upstream Embankment
3.2 ft.
2.6 ft.
2.7 ft.
yes
Sand
Summary Information
Fish Passage and Erosion is an area of concern for this site. Streambed dry, perched culvert, and extreme erosion