Road Stream Crossing Site LM081

Manistee River Watershed, Little Manistee River
Old Stronach Rd
Stronach Twp, Manistee County
Information collected by:
Site Location
GPS Coordinates: 44.210184 , -86.244891
T21N R16W Sec 20
Owned by Private
Fish Passability 0.5
Total Erosion: 0.5734 tons/year
Severity: Moderate
Year Inventoried: 2019
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: Wood
Structure Substrate: Sand
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 29 ft. , Width 109 ft. , Height 15 ft.
Structure Inlet
Water Depth: 2.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.7 ft./sec.
Structure Outlet
Water Depth: 2.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3 ft./sec.
*Water Velocities were measured 2 ft. below Surface (with Meter)
Additional Comments
Additional notes due to extreme flooding
Stream Information
Stream Flow: Bankfull
Riffle Information
Water Depth: 3 ft.
Bankfull Width: 60 ft.
Wetted Width: 60 ft.
Water Velocity: 2.1 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 28 ft.
Location of Low Point: Other
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 150 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0.0069 tons/year
Right Approach
Length: 400 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.53
Erosion: 0.5665 tons/year
Erosion Information
Total Erosion at Crossing: 0.5734 tons/year
Summary Information
Fish Passability 0.5
These non-native species were observerd at this site: Knappweed