Road Stream Crossing Site PM_M032
Pere Marquette River Watershed, Weldon Creek
Benson Rd
Branch Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 43.97153
, -86.12034
T18N
R15W
Sec 8
Owned by Private
Total Erosion: 0.0488 tons/year
Severity: Minor
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 30-70 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 24 ft.
, Width 18 ft.
, Height 5.5 ft.
Structure Inlet
Water Depth: 0.7 ft.
Water Velocity*: 0.7 ft./sec.
Structure Outlet
Water Depth: 0.6 ft.
Water Velocity*: 0.7 ft./sec.
*Water Velocities were measured 0.5 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 16 ft.
Wetted Width: 7 ft.
Water Velocity: 0.9 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 24 ft.
Location of Low Point: Other
Runoff Path: Ditch
Slope: Vertical
Slope: Vertical
Approaches
Left Approach
Length: 120 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.388
Erosion: 0.0369 tons/year
Right Approach
Length: 300 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0119 tons/year
Erosion Information
Total Erosion at Crossing: 0.0488 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.