Road Stream Crossing Site CLHW_LBR-020
Little Black River Watershed, South Branch Little Black River
W Court St
Beaugrand Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.64372
, -84.49652
T38N
R2W
Sec 36
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 0.4136 tons/year
Severity: Minor
Year Inventoried: 2016
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Fair
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
9 ft. |
57 ft. |
5.3 ft. |
Metal |
2 |
9 ft. |
53.5 ft. |
6.3 ft. |
Metal |
Structure Interior: corrugated
Dimensions of Structure: Length 53.5 ft.
, Width 9 ft.
, Height 6.3 ft.
Percentage Plugged:
Inlet: 26% to 50%
Outlet: 0%
In Pipe: 0%
Percentage Crushed:
Inlet: 1% to 25%
Outlet: 0%
In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 1.5 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0.4 ft.
Water Velocity*: 1.5 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 34 ft.
, Width 14 ft.
, Depth 2.2 ft.
Riffle Information
Water Depth: 2.8 ft.
Bankfull Width: 19 ft.
Wetted Width: 13 ft.
Water Velocity: 1 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Poor
Road Width at Culvert: 23 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.3 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 689 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.533
Erosion: 0.2794 tons/year
Right Approach
Length: 372 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.474
Erosion: 0.1342 tons/year
Erosion Information
Total Erosion at Crossing: 0.4136 tons/year
Summary Information
Fish Passability 0.9