Road Stream Crossing Site GTBAY_BRD016
Boardman River Watershed, Boardman River
Boardman Acre Drive
Blair Twp,
Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.650056
, -85.590199
T26N
R11W
Sec 13
Owned by State
Private
Private
Fish Passability 1
Total Erosion: 0.2877 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: Open Bottom Square/Rectangle
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: Sand
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 70 ft.
, Width 12 ft.
, Height 7 ft.
Structure Inlet
Water Depth: 3.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.3 ft./sec.
Structure Outlet
Water Depth: 3.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.3 ft./sec.
*Water Velocities were measured 1.8 ft. below Surface
(with Meter)
Additional Comments
Structure width greater than bank full and structure water velocity in line with riffle water velocity. Severity score equals 14 so considered minor.
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 2 ft.
Bankfull Width: 64 ft.
Wetted Width: 60 ft.
Water Velocity: 2.8 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Gravel
County Road
Road Condition: Fair
Road Width at Culvert: 11 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 200 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.43
Erosion: 0.2606 tons/year
Right Approach
Length: 30 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.298
Erosion: 0.0271 tons/year
Erosion Information
Total Erosion at Crossing: 0.2877 tons/year
Summary Information
Fish Passability 1
These non-native species were observerd at this site: Purple Loosestrife, Sweet White Clover