Road Stream Crossing Site PM_M001
Pere Marquette River Watershed, Pere Marquette River
Walhalla Rd
Branch Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 43.933146
, -86.114281
T18N
R15W
Sec 21
Owned by State
Total Erosion: 0.5041 tons/year
Severity: Moderate
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: Other
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 31 ft.
, Width 100 ft.
, Height 12 ft.
Structure Inlet
Water Depth: 3.4 ft.
Water Velocity*: 1.9 ft./sec.
Structure Outlet
Water Depth: 3.2 ft.
Water Velocity*: 2 ft./sec.
*Water Velocities were measured 2 ft. below Surface
(with Meter)
Additional Comments
Came after recent rain.
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 2.4 ft.
Bankfull Width: 59 ft.
Wetted Width: 54 ft.
Water Velocity: 2.2 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 30 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 270 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.448
Erosion: 0.12 tons/year
Right Approach
Length: 720 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.538
Erosion: 0.3842 tons/year
Erosion Information
Total Erosion at Crossing: 0.5041 tons/year
Extent of Erosion: Minor
Summary Information
Fish Passage is an area of concern for this site.