Road Stream Crossing Site AUS_RO012
Au Sable River Watershed, Tributary of South Creek
Pine Dr
AuSable Twp,
Roscommon County
Information collected by:
Site Location
GPS Coordinates: 44.43736
, -84.44755
T24N
R01W
Sec 27
Owned by State
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 5.0384 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Gravel
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 40 ft.
, Width 1.5 ft.
, Height 1.4 ft.
Percentage Crushed:
Inlet: 0%
Outlet: 0%
In Pipe: 1% to 25%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.9 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
Upstream Pond: Length 125 ft.
, Width 100 ft.
Riffle Information
Water Depth: 1.5 ft.
Bankfull Width: 144 ft.
Wetted Width: 129 ft.
Water Velocity: 0 ft./sec.
(Measured with Float Test)
Dominant Substrate: Silt
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 18.5 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.8 ft.
Slope: 1:2
Downstream
Fill Depth: 2 ft.
Slope: 1:2
Approaches
Left Approach
Length: 420 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.484
Erosion: 1.036 tons/year
Right Approach
Length: 485 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.619
Erosion: 4.0024 tons/year
Erosion Information
Total Erosion at Crossing: 5.0384 tons/year
Extent of Erosion: Minor
Notes: Around culverts
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. A larger culvert may be needed to allow for more water passage and halt the deposition of silt upstream and downstream
These non-native species were observerd at this site: European Swamp Thistle, Bull Thistle, Spotted Knapweed, Queen Anne's Lace