Road Stream Crossing Site AUS_CR049

Au Sable River Watershed, Barker Creek (West)
Dyer Truck Trail
Grayling Twp, Crawford County
Information collected by:
Huron Pines
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
(Measured with Float Test)
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
Fill Depth: 1.8 ft.
Slope: More than 1:2
Fill Depth: 2 ft.
Slope: More than 1:2
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
Reaching Stream?
Right Upstream
10 ft.
6 ft.
0.3 ft.
Left Downstream
9 ft.
5 ft.
0.4 ft.
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