Road Stream Crossing Site AUS_CR115
Au Sable River Watershed, Tributary of East Branch Au Sable River
Roberts Rd
Grayling Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.68852
, -84.70741
T27N
R03W
Sec 32
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 0.6695 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Apron
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 49 ft.
, Width 1.5 ft.
, Height 1.5 ft.
Percentage Plugged:
Inlet: 26% to 50%
Outlet: 26% to 50%
In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
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: 0.5 ft.
Bankfull Width: 8.5 ft.
Wetted Width: 3.8 ft.
Water Velocity: 0.84 ft./sec.
(Measured with Float Test)
Dominant Substrate: Organics
Road Information
Gravel
County Road
Road Condition: Poor
Road Width at Culvert: 25.5 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.7 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 125 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.39
Erosion: 0.3425 tons/year
Right Approach
Length: 120 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.388
Erosion: 0.3271 tons/year
Erosion Information
Total Erosion at Crossing: 0.6695 tons/year
Extent of Erosion: Minor
Notes: None
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Yes, to assess plugged inlet/outlet of culvert