Road Stream Crossing Site PM_L028

Pere Marquette River Watershed, Bray Creek
W 36th St
Webber Twp, Lake County
Information collected by:
Site Location
GPS Coordinates: 43.922534 , -85.822535
T18N R13W Sec 26
Owned by Private
Fish Passability 0
Total Erosion: 1.1558 tons/year
Severity: Severe
Year Inventoried: 2014
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: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 55 ft. , Width 4 ft. , Height 4 ft.
Structure Inlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 8 ft./sec.
*Water Velocities were measured 1 ft. below Surface (with Meter)
Additional Comments
Adjacent landonwer said he saw no salmon/steelhead last spring. Conservation easement property adjacent, downstream - Betka. Dam immediatley upstream crossing and helps maintain Bray Lake water levels.
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 10 ft. , Width 8 ft. , Depth 2 ft.
Riffle Information
Water Depth: 0.5 ft.
Bankfull Width: 20 ft.
Wetted Width: 18 ft.
Water Velocity: 0.9 ft./sec. (Measured with Meter)
Dominant Substrate: Cobble
Road Information
Gravel County Road
Road Condition: Fair
Road Width at Culvert: 19 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: 150 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.4
Erosion: 0.314 tons/year
Right Approach
Length: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.5758 tons/year
Erosion Information
Total Erosion at Crossing: 1.1558 tons/year
Extent of Erosion: Moderate
Notes: Downstream landowner reports visual observation of cloudy stream, clay during rain events.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Approach
150 ft.
19 ft.
0.1 ft.
yes
Clay
0.0735
Right Approach
250 ft.
19 ft.
0.1 ft.
yes
Sand
0.1925
Summary Information
Fish Passability 0