Road Stream Crossing Site PM_L027

Pere Marquette River Watershed, Bray Creek
W 40th St
Webber Twp, Lake County
Information collected by:
Site Location
GPS Coordinates: 43.915207 , -85.82365
T18N R13W Sec 26
Owned by Private
State
Fish Passability 0.5
Total Erosion: 2.1679 tons/year
Severity: Severe
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
1
2.2 ft.
35 ft.
2.2 ft.
Metal
2
1.6 ft.
35 ft.
1.6 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 35 ft.
Structure Inlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 0.9 ft./sec.
Structure Outlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.3 ft./sec.
*Water Velocities were measured 1 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 15 ft. , Width 15 ft. , Depth 1.5 ft.
Upstream Pond: Length 30 ft. , Width 30 ft. , Depth 1 ft.
Riffle Information
Water Depth: 1 ft.
Bankfull Width: 24 ft.
Wetted Width: 22 ft.
Water Velocity: 1.1 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Gravel County Road
Road Condition: Good
Road Width at Culvert: 21 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 5 ft.
Slope: 1:1
Downstream
Fill Depth: 5 ft.
Slope: 1:1
Approaches
Left Approach
Length: 380 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.476
Erosion: 1.0464 tons/year
Right Approach
Length: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.6364 tons/year
Erosion Information
Total Erosion at Crossing: 2.1679 tons/year
Extent of Erosion: Moderate
Erosion is occurring and corrective actions can be installed to address the problem.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Approach
380 ft.
21 ft.
0.1 ft.
yes
Sand
0.2926
Right Approach
250 ft.
21 ft.
0.1 ft.
yes
Sand
0.1925
Summary Information
Fish Passability 0.5
Erosion is an area of concern for this site. Culverts are old and undersized, and causing the wetland to form upstream. Warm water stream.
A future visit to this site is recommended. Monitor the culverts.