Road Stream Crossing Site AUS_RO016
Au Sable River Watershed, Tributary of South Branch Au Sable River
Moore Rd
Higgins Twp,
Roscommon County
Information collected by:
Site Location
GPS Coordinates: 44.42861
, -84.48198
T24N
R01W
Sec 31
Owned by State
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 6.5985 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: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 40 ft.
, Width 1.5 ft.
, Height 1.5 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 1.9 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: Less than Bankfull
Riffle Information
Water Depth: 2.5 ft.
Bankfull Width: 65 ft.
Wetted Width: 52 ft.
Water Velocity: 0 ft./sec.
(Measured with Float Test)
Dominant Substrate: Silt
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 21 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.7 ft.
Slope: More than 1:2
Downstream
Fill Depth: 1 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 3.2975 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 3.2975 tons/year
Erosion Information
Total Erosion at Crossing: 6.5985 tons/year
Extent of Erosion: Minor
Notes: Minor from road grading
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Ditch |
7 ft. |
4 ft. |
0.5 ft. |
yes |
Gravel |
0.0035 |
Summary Information
Fish Passability 0.5