Road Stream Crossing Site AUS_RO032

Au Sable River Watershed, Marsh Creek
F-97
Richfield Twp, Roscommon County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.38735 , -84.41016
T23N R01W Sec 14
Owned by State
Fish Passability 0.9
Total Erosion: 4.4276 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Sand
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 46.5 ft. , Width 16 ft. , Height 6.6 ft.
Structure Inlet
Water Depth: 4.5 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 4 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: 3.5 ft.
Bankfull Width: 24 ft.
Wetted Width: 17 ft.
Water Velocity: 0 ft./sec. (Measured with Float Test)
Dominant Substrate: Silt
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 46.5 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.8762 tons/year
Right Approach
Length: 1000 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 2.05
Erosion: 3.1512 tons/year
Erosion Information
Total Erosion at Crossing: 4.4276 tons/year
Extent of Erosion: Moderate
Erosion is occurring and corrective actions can be installed to address the problem.
Notes: Along streambank upstream and downstream
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Right Streambank
20 ft.
6 ft.
1.5 ft.
yes
Silt
0.1785
Left Streambank
16 ft.
13 ft.
1 ft.
yes
Sandy Loam
0.1075
Right Streambank
17 ft.
2 ft.
1 ft.
yes
Sandy Loam
0.1142
Summary Information
Fish Passability 0.9
A future visit to this site is recommended. To install erosion corrective actions such as silt fences and riprap.
These non-native species were observerd at this site: Spotted Knapweed, Canadian Thistle