Road Stream Crossing Site GTBAY_LEE021
West Bay Shoreline & Tributaries Watershed, Belanger's Creek
Pobuda
Suttons Bay Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 45.04032416
, -85.63001557
T30N
R11W
Sec 03
Owned by Private
Fish Passability 0.5
Total Erosion: 0.499 tons/year
Severity: Moderate
Year Inventoried: 2020
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: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 66.7 ft.
, Width 3.8 ft.
, Height 4.2 ft.
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.8 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.6 ft./sec.
*Water Velocities were measured 0.4 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 7.4 ft.
Wetted Width: 5.6 ft.
Water Velocity: 1 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
Town Road
Road Condition: Fair
Road Width at Culvert: 29.5 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.7 ft.
Slope: 1:2
Downstream
Fill Depth: 5.4 ft.
Slope: Vertical
Approaches
Left Approach
Length: 897.6 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.56
Erosion: 0.49 tons/year
Right Approach
Length: 25 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0012 tons/year
Erosion Information
Total Erosion at Crossing: 0.499 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 |
2.3 ft. |
2.4 ft. |
3.1 ft. |
yes |
Sand |
0.0078 |
Summary Information
Fish Passability 0.5
These non-native species were observerd at this site: Autumn Olive, Purple Loosestrife, Spotted Knapweed, Queen Anne's Lace