Road Stream Crossing Site AUS_PR073
Au Sable River Watershed, Surface Drain
McConnell Rd
Gustin Twp,
Alcona County
Information collected by:
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
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