Road Stream Crossing Site AUS_OS134
Au Sable River Watershed, North Branch Au Sable River
South River Rd
Mentor Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.628066
, -83.925321
T26N
R04E
Sec 23
Owned by Federal
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 2.8463 tons/year
Severity: Severe
Year Inventoried: 2012
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: Apron
Outlet Type: Outlet Apron
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Structure Interior: corrugated
Dimensions of Structure: Length 95 ft.
, Width 4.5 ft.
, Height 3 ft.
Percentage Plugged:
Inlet: 76% to 100%
Outlet: 0%
In Pipe: 0%
Percentage Crushed:
Inlet: 1% to 25%
Outlet: 0%
In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.5 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 0.5 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
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: 0.9 ft.
Bankfull Width: 10 ft.
Wetted Width: 6 ft.
Water Velocity: 0.7 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 21 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 8 ft.
Slope: More than 1:2
Downstream
Fill Depth: 7.5 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 1.4231 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 1.4231 tons/year
Erosion Information
Total Erosion at Crossing: 2.8463 tons/year
Summary Information
Fish Passability 0.5
Fish Passage is an area of concern for this site.
Culvert is damaged and plugged at the inlet. Lots of sand running down both approaches toward rsx, likely during and after heavy rainfall.
A future visit to this site is recommended. Condition of culvert