Road Stream Crossing Site AUS_PR001
Au Sable River Watershed, Van Etten Creek
M-72
Harrisville,
Alcona County
Information collected by:
Site Location
GPS Coordinates: 44.65631
, -83.37912
T26N
R09E
Sec 8,17
Owned by Private
Fish Passability 0
Perch Height: 0.4 ft.
Total Erosion: 1.6582 tons/year
Severity: Severe
Year Inventoried: 2012
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: Ellipse
Inlet Type: Mitered
Outlet Type: Freefall onto Riprap
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
6 ft. |
202 ft. |
6.5 ft. |
Metal |
2 |
6 ft. |
202 ft. |
6.5 ft. |
Metal |
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 202 ft.
, Width 6 ft.
, Height 6.5 ft.
Perch Height: 0.4 ft.
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.8 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.7 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Additional Comments
Some water is ponded between the inlet culverts, but other than this the stream splits neatly into the two culverts and hasn't really formed an upstream pond.
Stream Information
Stream Flow: Less than 1/2 Bankfull
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: 0.1 ft.
Bankfull Width: 7.4 ft.
Wetted Width: 4.6 ft.
Water Velocity: 1.2 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
State Road
Road Condition: Good
Road Width at Culvert: 44 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 10.4 ft.
Slope: More than 1:2
Downstream
Fill Depth: 9 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.8291 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.8291 tons/year
Erosion Information
Total Erosion at Crossing: 1.6582 tons/year
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site.
Yes, the culverts are very long, much more than 100 feet, and they have perched outlets, both of which are barriers to fish passage.
A future visit to this site is recommended. The culverts are long, and they have perched outlets.
These non-native species were observerd at this site: Spotted Knapweed, Sweet Clover, Autumn Olive, Bittersweet Nightshade