Road Stream Crossing Site GTBAY_LEE059
West Bay Shoreline & Tributaries Watershed, Belanger's Creek
Tatch
Leelanau Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 45.05506131
, -85.59951441
T31N
R11W
Sec 26
Owned by Private
Fish Passability 0
Perch Height: 1.4 ft.
Total Erosion: 0.7192 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: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: New
Structure Interior: corrugated
Dimensions of Structure: Length 72.4 ft.
, Width 2.5 ft.
, Height 2.6 ft.
Perch Height: 1.4 ft.
Structure Inlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.6 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.4 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 19.7 ft.
, Width 16.7 ft.
, Depth 3.45 ft.
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 12.3 ft.
Wetted Width: 7.1 ft.
Water Velocity: 0.9 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 28.7 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 9.6 ft.
Slope: 1:1
Downstream
Fill Depth: 8.3 ft.
Slope: 1:1
Approaches
Left Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.1309 tons/year
Right Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.5
Erosion: 0.2372 tons/year
Erosion Information
Total Erosion at Crossing: 0.7192 tons/year
Extent of Erosion: Severe
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Both sides and underneath culvert eroded
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Downstream Embankment |
2.7 ft. |
4.3 ft. |
2.8 ft. |
yes |
Sand |
0.1663 |
Left Downstream Embankment |
3.5 ft. |
4.2 ft. |
2.4 ft. |
yes |
Sand |
0.1848 |
Summary Information
Fish Passability 0
Erosion is an area of concern for this site.
Perched culvert and severe erosion