Road Stream Crossing Site GTBAY_S846
Boardman River Watershed, Boardman River Tributary
Cottageview Dr
Garfield Twp,
Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.75735
, -85.64494
T27N
R11W
Sec 09
Owned by Local Government
Private
Private
Fish Passability 0.9
Total Erosion: 0.0049 tons/year
Severity: Minor
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: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 46 ft.
, Width 2 ft.
, Height 2 ft.
Structure Inlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0.6 ft.
Water Velocity*: 0.6 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0.7 ft.
Water Velocity*: 0.2 ft./sec.
*Water Velocities were measured 0.5 ft. below Surface
(with Meter)
Additional Comments
parking lot entrance
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 3.5 ft.
Wetted Width: 2.5 ft.
Water Velocity: 0.2 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
Private Road
Road Condition: Good
Road Width at Culvert: 26 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 20 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.235
Erosion: 0.004 tons/year
Right Approach
Length: 20 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0.0009 tons/year
Erosion Information
Total Erosion at Crossing: 0.0049 tons/year
Summary Information
Fish Passability 0.9