Road Stream Crossing Site UBR_MB24
Upper Black River Watershed, Main Branch Black River
Barclay Ave
Forest Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.36422
, -84.298382
T34N
R1E
Sec 3
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.8067 tons/year
Severity: Moderate
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Right
Road Approach - Left
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: Gravel
General Conditions: Fair
Dimensions of Structure: Length 30 ft.
, Width 103 ft.
, Height 10.2 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 5.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.1 ft./sec.
Structure Outlet
Water Depth: 4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.1 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Additional Comments
Did 1 float test for all three (inlet, outlet and riffle) velocities; no major differences in river flow for these three
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 4 ft.
Bankfull Width: 79 ft.
Wetted Width: 77 ft.
Water Velocity: 2.1 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 23 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: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.4334 tons/year
Right Approach
Length: 880 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.558
Erosion: 0.3734 tons/year
Erosion Information
Total Erosion at Crossing: 0.8067 tons/year
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. The bridge itself is a little rough, it has areas crumbling on either edge and exposed rebar.