Road Stream Crossing Site AUS_RO035
Au Sable River Watershed, Tributary of South Branch Au Sable River
F-97
AuSable Twp,
Roscommon County
Information collected by:
Site Location
GPS Coordinates: 44.44713
, -84.4109
T24N
R01W
Sec 26
Owned by State
Total Erosion: 6.9674 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: Plastic
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 61 ft.
, Width 2.5 ft.
, Height 1.3 ft.
Percentage Plugged:
Inlet: 76% to 100%
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 1.2 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.6 ft.
Embedded Depth of Structure: 1.5 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Dominant Substrate: Organics
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 35 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3 ft.
Slope: More than 1:2
Downstream
Fill Depth: 4 ft.
Slope: 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: More Than 10%
Vegetation: Heavy
LS Factor: 5.785
Erosion: 6.6934 tons/year
Right Approach
Length: 475 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.495
Erosion: 0.272 tons/year
Erosion Information
Total Erosion at Crossing: 6.9674 tons/year
Extent of Erosion: Minor
Notes: Road shoulder gravel 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. |
40 ft. |
0.2 ft. |
no |
Gravel |
0.002 |
Summary Information
Fish Passage is an area of concern for this site.
Culvert is extremely plugged with sediment and debris
A future visit to this site is recommended. To clear or replace plugged culvert
These non-native species were observerd at this site: Queen Anne's Lace, Canada Thistle, Spotted Knapweed