Road Stream Crossing Site AUS_CR093
Au Sable River Watershed, Tributary of North Branch Au Sable River
McMaster's Bridge Rd
Lovells Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.69764
, -84.41852
T27N
R01W
Sec 27
Owned by Private
Fish Passability 0
Perch Height: 0.2 ft.
Total Erosion: 2.6842 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Apron
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: Rock
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 56 ft.
, Width 2 ft.
, Height 2 ft.
Perch Height: 0.2 ft.
Structure Inlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 1.5 ft./sec.
Structure Outlet
Water Depth: 0.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.765 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 5 ft.
, Width 3 ft.
, Depth 0.7 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 5 ft.
Wetted Width: 3 ft.
Water Velocity: 0.8 ft./sec.
(Measured with Float Test)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 33.4 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.9 ft.
Slope: More than 1:2
Downstream
Fill Depth: 3 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 407 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.603
Erosion: 0.2709 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.8
Erosion: 0.8833 tons/year
Erosion Information
Total Erosion at Crossing: 2.6842 tons/year
Extent of Erosion: Severe
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Silt fences are needed.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Ditch |
30 ft. |
25 ft. |
3 ft. |
no |
Silt |
1.53 |
Summary Information
Fish Passability 0
A future visit to this site is recommended. To assess erosion/scour pool
These non-native species were observerd at this site: Spotted Knapweed, Mullein