Road Stream Crossing Site LM021

Manistee River Watershed, Little Manistee River
Birch/ E 3 1/2 Mile Rd
Newkirk Twp, Lake County
Information collected by:
Site Location
GPS Coordinates: 44.038277 , -85.689573
T19N R12W Sec 13
Owned by State
Private
Fish Passability 0
Perch Height: 1.9 ft.
Total Erosion: 0.5288 tons/year
Severity: Severe
Year Inventoried: 2019
Inlet
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Other
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Ellipse
Inlet Type: Projecting
Outlet Type: Cascade over Riprap
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 50 ft. , Width 6.8 ft. , Height 5.2 ft.
Percentage Plugged: Inlet: 1% to 25%
Perch Height: 1.9 ft.
Structure Inlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.2 ft./sec.
Structure Outlet
Water Depth: 1.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.2 ft./sec.
*Water Velocities were measured 0.1 ft. below Surface (with Meter)
Additional Comments
Inlet has a perch just within from logjam; stream is modified for human use
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 50 ft. , Width 30 ft. , Depth 4 ft.
Riffle Information
Water Depth: 0.6 ft.
Bankfull Width: 22.5 ft.
Wetted Width: 20.5 ft.
Water Velocity: 1.2 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 18 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 6 ft.
Slope: 1:1.5
Downstream
Fill Depth: 6 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 500 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.635
Erosion: 0.4864 tons/year
Right Approach
Length: 150 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.4
Erosion: 0.0357 tons/year
Erosion Information
Total Erosion at Crossing: 0.5288 tons/year
Extent of Erosion: Minor
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Right Upstream Embankment
7 ft.
3 ft.
1 ft.
yes
Sandy Loam
0.0067
Summary Information
Fish Passability 0
Fish Passage is an area of concern for this site.