Road Stream Crossing Site LM051
Manistee River Watershed, Little Manistee River
N Irons Rd
Eden Twp,
Lake County
Information collected by:
Site Location
GPS Coordinates: 44.090575
, -85.905043
T20N
R13W
Sec 29
Owned by Private
Fish Passability 0.5
Total Erosion: 0.3808 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: Mixture
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 34 ft.
, Width 70 ft.
, Height 12.5 ft.
Structure Inlet
Water Depth: 2.9 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.7 ft./sec.
Structure Outlet
Water Depth: 2.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.9 ft./sec.
*Water Velocities were measured 2.5 ft. below Surface
(with Meter)
Additional Comments
Additional notes due to extreme flooding
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 3.5 ft.
Bankfull Width: 31 ft.
Wetted Width: 29 ft.
Water Velocity: 2.2 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 32 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: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.1164 tons/year
Right Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.5
Erosion: 0.2645 tons/year
Erosion Information
Total Erosion at Crossing: 0.3808 tons/year
Summary Information
Fish Passability 0.5