Road Stream Crossing Site AUS_PR104

Au Sable River Watershed, Duval Creek
Michaud Rd
Mikado Twp, Alcona County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.54892 , -84.12666
T25N R08E Sec 27,34
Owned by Private
Fish Passability 0.9
Structure is NOT Perched
Total Erosion: 7.1317 tons/year
Severity: Severe
Year Inventoried: 2013
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
1
2.5 ft.
22 ft.
2.5 ft.
Metal
2
2.5 ft.
22 ft.
2.5 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 22 ft. , Width 2.5 ft. , Height 2.5 ft.
Percentage Crushed: Inlet: 76% to 100%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.8 ft./sec.
Structure Outlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.5 ft./sec.
*Water Velocities were measured at the Surface (with Meter)
Additional Comments
Log jam downstream before the riffle
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 15 ft.
Wetted Width: 12 ft.
Water Velocity: 0.9 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel County Road
Road Condition: Fair
Road Width at Culvert: 16 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2.5 ft.
Slope: 1:1.5
Downstream
Fill Depth: 2.5 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.64
Erosion: 1.4105 tons/year
Right Approach
Length: 550 ft.
Slope: 6% to 10%
Vegetation: Partial
LS Factor: 2.36
Erosion: 5.7212 tons/year
Erosion Information
Total Erosion at Crossing: 7.1317 tons/year
Summary Information
Fish Passability 0.9
Fish Passage is an area of concern for this site. Both inlets are crushed over 75%, road crushed and eroded at site as well
A future visit to this site is recommended. Replace culverts
These non-native species were observerd at this site: Reed Canarygrass