Road Stream Crossing Site AUS_CR030
Au Sable River Watershed, Bright Lake Creek
Lewiston Grade Rd
Grayling Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.70625
, -84.69439
T27N
R03W
Sec 29
Owned by State
Fish Passability 0.9
Total Erosion: 0.9139 tons/year
Severity: Moderate
Year Inventoried: 2013
Crossing Information
Type of Crossing: Other
Structure Shape: Pipe Arch,Open Bottom Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Fair
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
2 |
4.2 ft. |
33 ft. |
3.2 ft. |
Metal |
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 37 ft.
, Width 4.2 ft.
, Height 3.6 ft.
Percentage Plugged:
Inlet: 0%
In Pipe: 1% to 25%
Structure Inlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0.2 ft.
Water Velocity*: 1.3 ft./sec.
Structure Outlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 1 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 18 ft.
, Width 25 ft.
, Depth 2 ft.
Upstream Pond: Length 50 ft.
, Width 63 ft.
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 25.5 ft.
Wetted Width: 18.6 ft.
Water Velocity: 2.35 ft./sec.
(Measured with Float Test)
Dominant Substrate: Gravel
Road Information
Sand
County Road
Road Condition: Fair
Road Width at Culvert: 24 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.5 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1 ft.
Slope: 1:1.5
Length: 0 ft.
Slope: 0%
Vegetation: Heavy
LS Factor: 0
Erosion: 0 tons/year
Right Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.9124 tons/year
Erosion Information
Total Erosion at Crossing: 0.9139 tons/year
Extent of Erosion: Minor
Notes: Gravel and sand eroding on top of culverts into stream from dirt road.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Approach |
3 ft. |
3 ft. |
0.5 ft. |
yes |
Gravel |
0.0015 |
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. Culverts are extremely rusted. There is a lot of impounded water also.
These non-native species were observerd at this site: Spotted Knapweed