Road Stream Crossing Site AUS_CR003

Au Sable River Watershed, Bradford Creek
Twin Peaks
Frederic Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.83155 , -84.74728
T28N R04W Sec 11
Owned by Private
Fish Passability 0
Structure is NOT Perched
Total Erosion: 7.4581 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Apron
Outlet Type: Outlet Apron
Structure Material: Metal
Structure Substrate: Rock
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 60 ft. , Width 3 ft. , Height 2.9 ft.
Percentage Crushed: Inlet: 0% Outlet: 0% In Pipe: 26% to 50%
Structure is NOT Perched
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 1.3776 ft./sec.
Structure Outlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 3.608 ft./sec.
*Water Velocities were measured 0.4 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 17 ft. , Width 17 ft. , Depth 0.7 ft.
Upstream Pond: Length 100 ft. , Width 36 ft. , Depth 1 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 28 ft.
Wetted Width: 26.5 ft.
Water Velocity: 1.476 ft./sec. (Measured with Meter)
Dominant Substrate: Silt
Road Information
Sand County Road
Road Condition: Fair
Road Width at Culvert: 27.8 ft.
Location of Low Point: Other
Runoff Path: Roadway
Fill Depth: 4 ft.
Slope: More than 1:2
Fill Depth: 4 ft.
Slope: 1:2
Left Approach
Length: 0 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.26
Erosion: 0 tons/year
Right Approach
Length: 570 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.709
Erosion: 7.4581 tons/year
Erosion Information
Total Erosion at Crossing: 7.4581 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Erosion from Road commision diversions led to deposition of sand sized particles approximately 20 feet from the stream channel.
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site. Yes, culvert may collapse.
A future visit to this site is recommended. Issues with the culvert
These non-native species were observerd at this site: Spotted Knapweed, Purple Loosestrife, Bull Thistle