Road Stream Crossing Site AUS_OS180
Au Sable River Watershed, Perry Creek
Helmer Lake Rd
Comins Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.73941
, -84.0759
T27N
R03E
Sec 9,16
Owned by Private
Fish Passability 0
Perch Height: 0.1 ft.
Total Erosion: 0.3684 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: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 58 ft.
, Width 2.6 ft.
, Height 2.6 ft.
Perch Height: 0.1 ft.
Structure Inlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 2.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 25 ft.
, Width 15 ft.
, Depth 3 ft.
Upstream Pond: Length 5.6 ft.
, Width 5 ft.
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 3.7 ft.
Wetted Width: 3 ft.
Water Velocity: 0.4 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 26.3 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 5 ft.
Slope: 1:2
Downstream
Fill Depth: 5.8 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0 tons/year
Right Approach
Length: 556.8 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.511
Erosion: 0.2475 tons/year
Erosion Information
Total Erosion at Crossing: 0.3684 tons/year
Extent of Erosion: Moderate
Erosion is occurring and corrective actions can be installed to address the problem.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Downstream Ditch |
6 ft. |
1.5 ft. |
2 ft. |
yes |
Sandy Loam |
0.0806 |
Right Downtream Ditch |
4 ft. |
2 ft. |
1.5 ft. |
yes |
Sandy Loam |
0.0403 |
Summary Information
Fish Passability 0
Erosion is an area of concern for this site.
Yes, moderate erosion and culvert doesn't line up with the stream very well.
A future visit to this site is recommended. To check on culvert quality. Also there is moderate erosion.
These non-native species were observerd at this site: Autumn Olive, Spotted Knapweed, Sweet Clover