Road Stream Crossing Site PM_M138
Pere Marquette River Watershed, Pere Marquette tributary
Bradshaw Rd
Pere Marquette Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 43.913335
, -86.391777
T18N
R17W
Sec 31
Owned by Private
Total Erosion: 0.3053 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: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 65 ft.
, Width 3 ft.
, Height 3 ft.
Structure Inlet
Water Depth: 0.3 ft.
Water Velocity*: 0.4 ft./sec.
Structure Outlet
Water Depth: 2.5 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 3 ft.
, Width 3 ft.
, Depth 2.5 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 6 ft.
Wetted Width: 2.5 ft.
Water Velocity: 0.4 ft./sec.
(Measured with Meter)
Dominant Substrate: Organics
Road Information
Paved
Federal Road
Road Condition: Fair
Road Width at Culvert: 19 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 12 ft.
Slope: 1:1
Downstream
Fill Depth: 12 ft.
Slope: Vertical
Approaches
Left Approach
Length: 270 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.448
Erosion: 0.076 tons/year
Right Approach
Length: 270 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.352
Erosion: 0.2293 tons/year
Erosion Information
Total Erosion at Crossing: 0.3053 tons/year
Extent of Erosion: Minor
Summary Information
Erosion is an area of concern for this site.