Road Stream Crossing Site AUS_CR002

Au Sable River Watershed, Bradford Creek
Twin Peaks
Frederic Twp, Crawford County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.83222 , -84.75327
T28N R04W Sec 11
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 4.2434 tons/year
Severity: Severe
Year Inventoried: 2013
Downstream Conditions
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: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 70 ft. , Width 6 ft. , Height 3 ft.
Percentage Plugged: Inlet: 1% to 25%
Percentage Crushed: In Pipe: 1% to 25%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.148 ft./sec.
Structure Outlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.64 ft./sec.
*Water Velocities were measured 0.4 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 26 ft. , Width 42 ft. , Depth 1.1 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 27 ft.
Wetted Width: 25 ft.
Water Velocity: 0.7216 ft./sec.
Dominant Substrate: Silt
Road Information
Sand County Road
Road Condition: Good
Road Width at Culvert: 33.1 ft.
Location of Low Point: Other
Runoff Path: Roadway
Fill Depth: 4.1 ft.
Slope: More than 1:2
Fill Depth: 4 ft.
Slope: More than 1:2
Left Approach
Length: 840 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.554
Erosion: 4.2434 tons/year
Right Approach
Length: 0 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.26
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 4.2434 tons/year
Extent of Erosion: Minor
Notes: Road Commision diversion outlet on downstream left approach.
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. Slightly crushed in pipe, could cause problems in future.