Road Stream Crossing Site AUS_OT108
Au Sable River Watershed, North Branch Au Sable River
Old State Rd
Chester Twp,
Otsego County
Information collected by:
Site Location
GPS Coordinates: 44.91497
, -84.59849
T29N
R02W
Sec 18
Owned by Private
Fish Passability 0.9
Total Erosion: 1.319 tons/year
Severity: Moderate
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: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 90 ft.
, Width 12.5 ft.
, Height 9 ft.
Structure Inlet
Water Depth: 3.1 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 0.308 ft./sec.
Structure Outlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0.6 ft.
Water Velocity*: 0.526 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 65 ft.
, Width 110 ft.
, Depth 3.5 ft.
Riffle Information
Water Depth: 1.6 ft.
Bankfull Width: 80 ft.
Wetted Width: 60 ft.
Water Velocity: 0.18 ft./sec.
(Measured with Float Test)
Dominant Substrate: Silt
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 35 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3.3 ft.
Slope: More than 1:2
Downstream
Fill Depth: 3 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.6595 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.6595 tons/year
Erosion Information
Total Erosion at Crossing: 1.319 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Minor erosion over culvert near roadway
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Silt fences need to be installed
These non-native species were observerd at this site: Leafy Spurge, Mullein, Bladder Campion, Spotted Knapweed, Queen Anne's Lace, Canada Thistle