Road Stream Crossing Site CLHW_LBR-014
Little Black River Watershed, Unnamed Branch of Little Black River
Riggsville Rd
Inverness Twp,
Cheboygan County
Information collected by:
Site Location
GPS Coordinates: 45.62891
, -84.50872
T37N
R2W
Sec 1
Owned by Private
Fish Passability 0
Perch Height: 1 ft.
Total Erosion: 0.7119 tons/year
Severity: Severe
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: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Concrete
Structure Substrate: None
General Conditions: Poor
Structure Interior: smooth
Dimensions of Structure: Length 72 ft.
, Width 4 ft.
, Height 4 ft.
Percentage Plugged:
Inlet: 1% to 25%
Outlet: 0%
In Pipe: 0%
Perch Height: 1 ft.
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.5 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.5 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 32 ft.
, Width 14 ft.
, Depth 1.5 ft.
Riffle Information
Water Depth: 0.9 ft.
Bankfull Width: 5.6 ft.
Wetted Width: 4.6 ft.
Water Velocity: 0.2 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 22.8 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4.5 ft.
Slope: More than 1:2
Downstream
Fill Depth: 3.4 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 700 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.535
Erosion: 0.2823 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.4296 tons/year
Erosion Information
Total Erosion at Crossing: 0.7119 tons/year
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site.
Very shallow water depth in culvert, fish unable to pass
A future visit to this site is recommended. Yes, but this isn't necessarily a priority; stream may be seasonal