Road Stream Crossing Site AUS_CR077
Au Sable River Watershed, Connor's Marsh Creek
Connor's Flats Rd
South Branch Twp,
Crawford County
Information collected by:
Site Location
GPS Coordinates: 44.66989
, -84.42698
T26N
R01W
Sec 3
Owned by Private
State
State
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 10.567 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 60 ft.
, Width 6 ft.
, Height 5.7 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.68 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0.3 ft.
Water Velocity*: 1.6 ft./sec.
*Water Velocities were measured at the Surface
(with Float Test)
Stream Information
Stream Flow: Less than 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: 0.8 ft.
Bankfull Width: 19.5 ft.
Wetted Width: 8.4 ft.
Water Velocity: 1.74 ft./sec.
(Measured with Float Test)
Dominant Substrate: Cobble
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 22 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3.2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 4 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.8
Erosion: 4.8485 tons/year
Right Approach
Length: 443 ft.
Slope: 6% to 10%
Vegetation: Partial
LS Factor: 2.125
Erosion: 5.7042 tons/year
Erosion Information
Total Erosion at Crossing: 10.567 tons/year
Extent of Erosion: Minor
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Ditch |
13 ft. |
9 ft. |
1 ft. |
no |
Sand |
0.0143 |
Summary Information
Fish Passability 0.5
These non-native species were observerd at this site: Spotted Knapweed, Bull Thistle