Road Stream Crossing Site AUS_CR049
Au Sable River Watershed, Barker Creek (West)
Dyer Truck Trail
Grayling Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.69872
, -84.4951
T27N
R02W
Sec 36
Owned by State
Total Erosion: 2.7502 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: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 26 ft.
, Width 1.3 ft.
, Height 1.3 ft.
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0.2 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
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 18 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.8 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 515 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.646
Erosion: 1.6497 tons/year
Right Approach
Length: 365 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.583
Erosion: 1.0543 tons/year
Erosion Information
Total Erosion at Crossing: 2.7502 tons/year
Extent of Erosion: Moderate
Notes: Two erosion sites right above the culvert, upstream is more severe than downstream.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Upstream |
10 ft. |
6 ft. |
0.3 ft. |
yes |
Gravel |
0.021 |
Left Downstream |
9 ft. |
5 ft. |
0.4 ft. |
yes |
Gravel |
0.0252 |
Summary Information
Erosion is an area of concern for this site.
Yes, erosion above culvert is causing road surface to withdraw.
A future visit to this site is recommended. To assess erosion issues over/around culverts