Road Stream Crossing Site AUS_PR073

Au Sable River Watershed, Surface Drain
McConnell Rd
Gustin Twp, Alcona County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.60461 , -83.44273
T26N R08E Sec 34,35
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.6328 tons/year
Severity: Moderate
Year Inventoried: 2013
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
1
5 ft.
43.5 ft.
5 ft.
Metal
2
5 ft.
43.5 ft.
5 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 43.5 ft. , Width 5 ft. , Height 5 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Stream Information
Stream Flow: None
Scour Pool: Length 50 ft. , Width 45 ft. , Depth 0.7 ft.
Upstream Pond: Length 10 ft. , Width 40 ft. , Depth 0.6 ft.
Riffle Information
Water Depth: 0 ft.
Bankfull Width: 0 ft.
Wetted Width: 0 ft.
Water Velocity: 0 ft./sec.
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 22.5 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.6 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1.6 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 606 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.521
Erosion: 0.2348 tons/year
Right Approach
Length: 946 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.565
Erosion: 0.3973 tons/year
Erosion Information
Total Erosion at Crossing: 0.6328 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Looks like they were caused by a turtle nest.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Right Downtream Ditch
1.5 ft.
2 ft.
0.2 ft.
no
Sand
0.0003
Right Upstream Ditch
2 ft.
1 ft.
0.2 ft.
no
Sand
0.0004
Summary Information
Fish Passability 0.5
Erosion is an area of concern for this site. Yes, there is an upstream pond and a large scour pool present. The water smells funny.
A future visit to this site is recommended. Spotted knapweed, white sweet clover