Road Stream Crossing Site PM_L033

Pere Marquette River Watershed, Middle Branch tributary
80th St
Chase Twp, Lake County
Information collected by:
Site Location
GPS Coordinates: 43.84439 , -85.60548
T17N R11W Sec 22
Owned by Private
Fish Passability 0.9
Total Erosion: 0.2885 tons/year
Severity: Moderate
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 30-70 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Fair
Dimensions of Structure: Length 30 ft. , Width 20 ft. , Height 6 ft.
Structure Inlet
Water Depth: 0.5 ft.
Water Velocity*: 0.3 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Water Velocity*: 0.4 ft./sec.
*Water Velocities were measured at the Surface (with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 5 ft.
Wetted Width: 4 ft.
Water Velocity: 0.4 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Fair
Road Width at Culvert: 22 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Approaches
Left Approach
Length: 350 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.47
Erosion: 0.1196 tons/year
Right Approach
Length: 470 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.494
Erosion: 0.1689 tons/year
Erosion Information
Total Erosion at Crossing: 0.2885 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0.9