Road Stream Crossing Site PM_M157

Pere Marquette River Watershed, Pere Marquette tributary
Cobbs St
Pere Marquette Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 43.94711 , -86.43208
T18N R18W Sec 23
Owned by Private
Local Government
Fish Passability 0.9
Total Erosion: 0.0647 tons/year
Severity: Moderate
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: 1
Structure Shape: Pipe Arch
Inlet Type: Mitered
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 52 ft. , Width 13 ft. , Height 3 ft.
Structure Inlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 1.6 ft./sec.
Structure Outlet
Water Depth: 0.7 ft.
Water Velocity*: 0.4 ft./sec.
*Water Velocities were measured 0.8 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 11 ft.
Wetted Width: 10 ft.
Water Velocity: 1.3 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved Town Road
Road Condition: Good
Road Width at Culvert: 22 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3.5 ft.
Slope: 1:2
Downstream
Fill Depth: 3.5 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 90 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.372
Erosion: 0.0243 tons/year
Right Approach
Length: 140 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.396
Erosion: 0.0403 tons/year
Erosion Information
Total Erosion at Crossing: 0.0647 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passability 0.9