Road Stream Crossing Site GTBAY_S709

Boardman River Watershed, Twenty-Two Creek
ORV Trail/ Lake Rd
Union Twp, Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.62402 , -85.37351
T26N R9W Sec 26
Owned by State
Private
Fish Passability 1
Total Erosion: 0.432 tons/year
Severity: Severe
Year Inventoried: 2020
Inlet
Inlet
Inlet
Outlet
Upstream Conditions
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Other
Outlet Type: At Stream Grade
Structure Material: Wood
Structure Substrate: Mixture
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 14 ft. , Width 14 ft. , Height 3.5 ft.
Percentage Plugged: Inlet: 26% to 50%
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.2 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.3 ft./sec.
*Water Velocities were measured 0.6 ft. below Surface (with Meter)
Additional Comments
Changed passability to 1. Beaver dam is obstruction and they are passable when not supported by structure. Structure is 14 feet wide, so does not support dam.
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 12.7 ft.
Wetted Width: 11 ft.
Water Velocity: 0.9 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Sand Other Road
Road Condition: Poor
Road Width at Culvert: 8 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 0.5 ft.
Slope: Vertical
Downstream
Fill Depth: 0.5 ft.
Slope: Vertical
Approaches
Left Approach
Length: 200 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.43
Erosion: 0.1895 tons/year
Right Approach
Length: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.2424 tons/year
Erosion Information
Total Erosion at Crossing: 0.432 tons/year
Summary Information
Fish Passability 1

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