Road Stream Crossing Site AUS_PR139

Au Sable River Watershed, Gimlet Creek
Procunier Rd
Millen Twp, Alcona County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.61151 , -83.56117
T26N R07E Sec 26,35
Owned by Private
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 4.0854 tons/year
Severity: Severe
Year Inventoried: 2013
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: 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 26 ft. , Width 3.7 ft. , Height 2.3 ft.
Percentage Crushed: Outlet: 1% to 25%
Structure is NOT Perched
Structure Inlet
Water Depth: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.6 ft./sec.
Structure Outlet
Water Depth: 3.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.4 ft./sec.
*Water Velocities were measured at the Surface (with Float Test)
Additional Comments
Erosion from road
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: 0.4 ft.
Bankfull Width: 8.5 ft.
Wetted Width: 3 ft.
Water Velocity: 0.6 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Sand County Road
Road Condition: Good
Road Width at Culvert: 24 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2.7 ft.
Slope: 1:1.5
Downstream
Fill Depth: 2.2 ft.
Slope: Vertical
Approaches
Left Approach
Length: 273 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.449
Erosion: 0.8108 tons/year
Right Approach
Length: 830 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.553
Erosion: 3.0346 tons/year
Erosion Information
Total Erosion at Crossing: 4.0854 tons/year
Extent of Erosion: Severe
Notes: Erosion caused from runoff on south side of the left approach
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Approach
2 ft.
4 ft.
6 ft.
yes
Gravel
0.24
Summary Information
Fish Passability 0.5
Erosion is an area of concern for this site.