Road Stream Crossing Site TBW_TBAP104
Thunder Bay River Watershed, Thunder Bay River
M 32
Green Twp,
Alpena County
Information collected by:
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