Road Stream Crossing Site GTBAY_MC011
Mitchell Creek Watershed, Mitchell Creek
N 3 Mile Rd
East Bay Twp,
Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.734882
, -85.556422
T27N
R10W
Sec 18
Owned by Private
Fish Passability 1
Total Erosion: 0.5342 tons/year
Severity: Minor
Year Inventoried: 2020
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Square/Rectangle
Inlet Type: Wingwall 30-70 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 101 ft.
, Width 32 ft.
, Height 5.3 ft.
Structure Inlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.7 ft./sec.
Structure Outlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.5 ft./sec.
*Water Velocities were measured 1.5 ft. below Surface
(with Meter)
Additional Comments
Change Passability to 1 and severity to minor. Low water velocity causing heavy sedimentation but easily passable by fish. Large concrete bridge with natural stream bottom and low velocities through structure.
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.9 ft.
Bankfull Width: 18 ft.
Wetted Width: 17.4 ft.
Water Velocity: 0.4 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 64 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.5 ft.
Slope: Vertical
Downstream
Fill Depth: 1.5 ft.
Slope: Vertical
Approaches
Left Approach
Length: 50 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0053 tons/year
Right Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.5
Erosion: 0.5289 tons/year
Erosion Information
Total Erosion at Crossing: 0.5342 tons/year
Summary Information
Fish Passability 1
These non-native species were observerd at this site: Spotted Knapweed