Road Stream Crossing Site GTBAY_LEE096
West Bay Shoreline & Tributaries Watershed, Unnamed
Twin Creek Rd
Elmwood Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 44.79077152
, -85.65094678
T28N
R11W
Sec 28
Fish Passability 0
Perch Height: 0.35 ft.
Total Erosion: 0.1685 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: Concrete
Structure Substrate: None
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 60.1 ft.
, Width 2.2 ft.
, Height 2.3 ft.
Perch Height: 0.35 ft.
Structure Inlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 5 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 14 ft./sec.
*Water Velocities were measured 0.05 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 8.6 ft.
, Width 9.1 ft.
, Depth 1.1 ft.
Riffle Information
Water Depth: 0.4 ft.
Bankfull Width: 3.1 ft.
Wetted Width: 2 ft.
Water Velocity: 3.8 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
Private Road
Road Condition: Fair
Road Width at Culvert: 31.4 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2 ft.
Slope: 1:1
Downstream
Fill Depth: 2.4 ft.
Slope: 1:1
Approaches
Left Approach
Length: 70.4 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.353
Erosion: 0.0258 tons/year
Right Approach
Length: 243.2 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.515
Erosion: 0.1299 tons/year
Erosion Information
Total Erosion at Crossing: 0.1685 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) | |
Right Downstream Embankment |
2.9 ft. |
3.7 ft. |
3 ft. |
yes |
Sandy Loam |
0.0084 |
Right Downstream Embankment |
3.3 ft. |
2.6 ft. |
1.4 ft. |
yes |
Sandy Loam |
0.0044 |
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site.
Perched culvert + erosion
These non-native species were observerd at this site: Forget-me-nots