Road Stream Crossing Site PM_N029

Pere Marquette River Watershed, McDuffee Creek
12 Mile Rd
Monroe Twp, Newaygo County
Information collected by:
Site Location
GPS Coordinates: 43.7280788790763 , -85.7090093940496
T15N R12W Sec 2
Owned by Private
Total Erosion: 0.1292 tons/year
Severity: Moderate
Year Inventoried: 2014
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: smooth
Dimensions of Structure: Length 20 ft. , Width 36 ft. , Height 5 ft.
Structure Inlet
Water Depth: 1.2 ft.
Water Velocity*: 1.7 ft./sec.
Structure Outlet
Water Depth: 1.4 ft.
Water Velocity*: 1 ft./sec.
(with Float Test)
Additional Comments

wood surface, metal frame, concrete foundation

Stream Information
Stream Flow: Bankfull
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 13 ft.
Wetted Width: 13 ft.
Water Velocity: 0.9 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel County Road
Road Condition: Good
Road Width at Culvert: 18 ft.
Location of Low Point: Other
Runoff Path: Roadway
Slope: Vertical
Slope: Vertical
Left Approach
Length: 200 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0496 tons/year
Right Approach
Length: 200 ft.
Slope: Less Than 1%
Vegetation: Partial
LS Factor: 0.05
Erosion: 0.0496 tons/year
Erosion Information
Total Erosion at Crossing: 0.1292 tons/year
Extent of Erosion: Minor
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Right Approach
200 ft.
1 ft.
0.1 ft.
Left Approach
100 ft.
1 ft.
0.1 ft.
Summary Information
Erosion is an area of concern for this site.