Road Stream Crossing Site AUS_OS170
Au Sable River Watershed, Tributary of Comins Creek
Weaver Rd
Comins Twp,
Oscoda County
Information collected by:
Site Location
GPS Coordinates: 44.69607
, -84.03022
T27N
R03E
Sec 25,26
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 1.7262 tons/year
Severity: Moderate
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: 2
Structure Shape: Ellipse
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
4 ft. |
65 ft. |
2.5 ft. |
Metal |
2 |
2.5 ft. |
64 ft. |
2.5 ft. |
Metal |
Structure Interior: corrugated
Dimensions of Structure: Length 64 ft.
, Width 4 ft.
, Height 2.5 ft.
Percentage Crushed:
Inlet: 1% to 25%
Outlet: 0%
In Pipe: 0%
Structure is NOT Perched
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Additional Comments
Culvert 2 is set slightly above stream grade and isn't carrying water through. The scour pool is very large and deep. The whole stream below the pool is full of one species of grass (possible reed canary grass) and nothing else.
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 21 ft.
, Width 15 ft.
, Depth 3.7 ft.
Upstream Pond: Length 9 ft.
, Width 8.5 ft.
, Depth 1.3 ft.
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 18.5 ft.
Wetted Width: 7.4 ft.
Water Velocity: 0.1 ft./sec.
(Measured with Meter)
Dominant Substrate: Organics
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 22 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 5.5 ft.
Slope: 1:2
Downstream
Fill Depth: 6.6 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 618.8 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.523
Erosion: 0.2353 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 1.4909 tons/year
Erosion Information
Total Erosion at Crossing: 1.7262 tons/year
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. To evaluate whether the scour pool could be fixed and whether having all the stream flow going through just one of the culverts is a problem.
These non-native species were observerd at this site: Spotted Knapweed, Autumn Olive