Road Stream Crossing Site AUS_RO030
Au Sable River Watershed, Tributary of Lake St. Helen
F-97
Richfield Twp,
Roscommon County
Information collected by:
Site Location
GPS Coordinates: 44.37861
, -84.41028
T23N
R01W
Sec 14
Owned by State
Fish Passability 0.5
Total Erosion: 1.4169 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: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 58 ft.
, Width 2 ft.
, Height 2 ft.
Percentage Plugged:
Outlet: 26% to 50%
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.43 ft./sec.
Structure Outlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 0.68 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 5.5 ft.
Wetted Width: 3 ft.
Water Velocity: 1.52 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 37.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 0.5 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.7066 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.7066 tons/year
Erosion Information
Total Erosion at Crossing: 1.4169 tons/year
Extent of Erosion: Minor
Notes: Road shoulder erosion
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Ditch |
10 ft. |
15 ft. |
0.2 ft. |
no |
Gravel |
0.002 |
Right Ditch |
8.5 ft. |
13 ft. |
0.2 ft. |
no |
Gravel |
0.0017 |
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. Plugged by vegetation at outlet
These non-native species were observerd at this site: Spotted Knapweed