Road Stream Crossing Site TBW_TBAP104

Thunder Bay River Watershed, Thunder Bay River
M 32
Green Twp, Alpena County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 45.05911 , -83.78206
T31N R5E Sec 26
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.1397 tons/year
Severity: Moderate
Year Inventoried: 2017
Site ID
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: Concrete
Structure Substrate: Rock
General Conditions: New
Structure Interior: smooth
Dimensions of Structure: Length 42 ft. , Width 37 ft. , Height 10.2 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.6 ft./sec.
Structure Outlet
Water Depth: 3.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.5 ft./sec.
*Water Velocities were measured 1.3 ft. below Surface (with Meter)
Stream Information
Stream Flow: More than Bankfull
Riffle Information
Water Depth: 3 ft.
Bankfull Width: 55 ft.
Wetted Width: 60 ft.
Water Velocity: 1.8 ft./sec. (Measured with Meter)
Dominant Substrate: Cobble
Road Information
Paved State Road
Road Condition: Good
Road Width at Culvert: 40 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: 1000 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0661 tons/year
Right Approach
Length: 1000 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0661 tons/year
Erosion Information
Total Erosion at Crossing: 0.1397 tons/year
Extent of Erosion: Minor
Notes: EROSION FROM FOOT TRAFFIC ACCESS TO THE RIVER
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Right Upstream Streambank
5 ft.
5 ft.
1.5 ft.
yes
Gravelly Loam
0.0075
Summary Information
Fish Passability 0.5
These non-native species were observerd at this site: Autumn Olive and Spotted Knapweed