Road Stream Crossing Site AUS_CR016

Au Sable River Watershed, East Branch Au Sable River
County Rd 612
Lovells Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.78913 , -84.59676
T28N R02W Sec 30
Owned by State
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.2361 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: Other
Structure Shape: Ellipse
Inlet Type: Mitered
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Rock
General Conditions: Fair
Multiple Culverts/Spans
4.6 ft.
49 ft.
3.3 ft.
4.6 ft.
49 ft.
3.3 ft.
4.6 ft.
49 ft.
3.3 ft.
Structure Interior: corrugated
Dimensions of Structure: Length 49 ft. , Width 4.6 ft. , Height 3.3 ft.
Percentage Plugged: Inlet: 0% Outlet: 0% In Pipe: 26% to 50%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0.4 ft.
Water Velocity*: 1.7 ft./sec.
Structure Outlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0.4 ft.
Water Velocity*: 2.27 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 28 ft. , Width 22 ft. , Depth 1.8 ft.
Upstream Pond: Length 34 ft. , Width 40 ft.
Riffle Information
Water Depth: 1.9 ft.
Bankfull Width: 44 ft.
Wetted Width: 41 ft.
Water Velocity: 1.42 ft./sec. (Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 30 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 1.2 ft.
Slope: More than 1:2
Fill Depth: 2 ft.
Slope: More than 1:2
Left Approach
Length: 480 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.496
Erosion: 0.2361 tons/year
Length: 0 ft.
Slope: 0%
Vegetation: Partial
LS Factor: 0
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.2361 tons/year
Extent of Erosion: Minor
Notes: Rock path to stream on right upstream approach may cause future erosion.
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. Crushed pipes, especially the primary pipe (crushed ~30-50%).
These non-native species were observerd at this site: Spotted Knapweed