Road Stream Crossing Site AUS_AL034

Au Sable River Watershed, Tributary of Bamfield Creek
Horseshoe Lake Rd (County Rd 4124)
Millen Twp, Alcona County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.60128 , -83.76594
T26N R06E Sec 31
Owned by Federal
Fish Passability 0
Perch Height: 2.2 ft.
Total Erosion: 3.1535 tons/year
Severity: Severe
Year Inventoried: 2013
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
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 35 ft. , Width 1.2 ft. , Height 1.2 ft.
Perch Height: 2.2 ft.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Water Depth: 0 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Additional Comments
Downstream culvert, could use rock riprap to prevent eroding
Stream Information
Stream Flow: None
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 0 ft.
Bankfull Width: 0 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec. (Measured with Float Test)
Dominant Substrate: Organics
Road Information
Gravel Federal Road
Road Condition: Good
Road Width at Culvert: 18 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 724 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.539
Erosion: 1.9336 tons/year
Right Approach
Length: 200 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.23
Erosion: 1.2198 tons/year
Erosion Information
Total Erosion at Crossing: 3.1535 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0