Road Stream Crossing Site AGIO056

Au Gres River Watershed, Mongo Creek
Leggett Rd
Burleigh Twp, Iosco County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.21928 , -83.79613
T21N R5E Sec 11 & 14
Owned by Private
Fish Passability 0
Perch Height: 2.1 ft.
Total Erosion: 1.4391 tons/year
Severity: Severe
Year Inventoried: 2014
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Ellipse
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 50 ft. , Width 3.3 ft. , Height 2.6 ft.
Perch Height: 2.1 ft.
Structure Inlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.3 ft./sec.
*Water Velocities were measured 0.1 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 7.5 ft. , Width 4.4 ft. , Depth 3 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 0.4 ft.
Bankfull Width: 11 ft.
Wetted Width: 3 ft.
Water Velocity: 0.4 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 20 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: 3.6 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.3769 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 0.3769 tons/year
Erosion Information
Total Erosion at Crossing: 1.4391 tons/year
Extent of Erosion: Moderate
Notes: Significant streambank erosion.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Downstream Streambank
17 ft.
3 ft.
3 ft.
yes
Sandy Loam
0.3427
Right Downstream Streambank
17 ft.
2 ft.
3 ft.
yes
Sandy Loam
0.3427
Summary Information
Fish Passability 0
A future visit to this site is recommended. Culvert is severely perched and significant erosion is occuring. Install erosion control measures, or potentially replace culvert.