Road Stream Crossing Site AUS_CR041

Au Sable River Watershed, Shellenbarger Creek
Grayling Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.65654 , -84.68938
T26N R03W Sec 17
Owned by Private
Fish Passability 0
Total Erosion: 0.7914 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Other
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Other
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Gravel
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 72.8 ft. , Width 7.8 ft. , Height 4.1 ft.
Structure Inlet
Water Depth: 1.1 ft.
Water Velocity*: 3.6 ft./sec.
Structure Outlet
Water Depth: 1.3 ft.
Water Velocity*: 2.4 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 22 ft. , Width 16 ft. , Depth 1.4 ft.
Upstream Pond: Length 29 ft. , Width 27.5 ft.
Riffle Information
Water Depth: 1.2 ft.
Bankfull Width: 22 ft.
Wetted Width: 19 ft.
Water Velocity: 1 ft./sec. (Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved State Road
Road Condition: Good
Road Width at Culvert: 42 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 4.2 ft.
Slope: 1:2
Fill Depth: 4 ft.
Slope: More than 1:2
Length: 0 ft.
Slope: 0%
Vegetation: Heavy
LS Factor: 0
Erosion: 0 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.7914 tons/year
Erosion Information
Total Erosion at Crossing: 0.7914 tons/year
Extent of Erosion: Moderate
Notes: Definite erosion along bank of creek. Impounded water causing bank to erode and widen.
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site. Velocity at inlet is extremely fast, too fast for most fish species.
A future visit to this site is recommended. Erosion of banks, lots of impounded water, and dramatic increases of flow velocities at culvert.
These non-native species were observerd at this site: Queen Anne's Lace, Zebra Mussel, Spotted Knapweed