Road Stream Crossing Site TBW_TBAC110
Thunder Bay River Watershed, Silver Creek
M 72
Mitchell Twp,
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.72656
, -83.84544
T27N
R5E
Sec 16
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.5182 tons/year
Severity: Moderate
Year Inventoried: 2017
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 95 ft.
, Width 2.5 ft.
, Height 2.5 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.6 ft./sec.
Structure Outlet
Water Depth: 0.65 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 3 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Additional Comments
Velocity inside the culvert appeard to be a higher velocity than at the ends. I have assigened the outlet velocity as 3.0 ft/sec in order to flag this site as passage barrier, but actual outlet velocity was 1.0 ft/sec
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 15 ft.
Wetted Width: 7.7 ft.
Water Velocity: 1.2 ft./sec.
(Measured with Meter)
Dominant Substrate: Silt
Road Information
Paved
State Road
Road Condition: Good
Road Width at Culvert: 27.5 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 5.6 ft.
Slope: 1:2
Downstream
Fill Depth: 6.2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.5182 tons/year
Right Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.5182 tons/year
Summary Information
Fish Passability 0.5
Fish Passage is an area of concern for this site.
Fish Passage. Due to the culverts slope relative to stream level water is flowing very quickly through most of the culvert and hitting the outlet stream level where water gets deeper just before the outlet and slows the velocity.
These non-native species were observerd at this site: Mullein