Road Stream Crossing Site GTBAY_MC021

Mitchell Creek Watershed, Mitchell Creek
Emerson Rd
Garfield Twp, Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.70794499 , -85.59122664
T27N R11W Sec 25
Owned by Local Government
Private
Fish Passability 0
Perch Height: 0.1 ft.
Total Erosion: 0.9118 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: Fair
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 68.5 ft. , Width 3 ft. , Height 3 ft.
Perch Height: 0.1 ft.
Structure Inlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.1 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.2 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 18.4 ft. , Width 8 ft. , Depth 1 ft.
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 8.9 ft.
Wetted Width: 3.7 ft.
Water Velocity: 1 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 22.8 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 5.5 ft.
Slope: 1:2
Downstream
Fill Depth: 5.5 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 999 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.4291 tons/year
Right Approach
Length: 946 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.565
Erosion: 0.4026 tons/year
Erosion Information
Total Erosion at Crossing: 0.9118 tons/year
Extent of Erosion: Moderate
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
2.5 ft.
3.3 ft.
2.5 ft.
yes
Sandy Loam
0.042
Right Downstream Embankment
2.7 ft.
2.4 ft.
2.1 ft.
yes
Sandy Loam
0.0381
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site. Perched culvert
These non-native species were observerd at this site: Queen Anne's Lace, Spotted Knapweed, Autumn Olive