Road Stream Crossing Site PM_N024

Pere Marquette River Watershed, Big South Branch Pere Marquette
10 Mile Rd
Beaver Twp, Newaygo County
Information collected by:
Site Location
GPS Coordinates: 43.69845 , -85.94594
T15N R14W Sec 11
Owned by Private
Fish Passability 0.9
Total Erosion: 1.1536 tons/year
Severity: Moderate
Year Inventoried: 2014
Upstream Conditions
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: Metal
Structure Substrate: Mixture
General Conditions: Poor
Dimensions of Structure: Length 16 ft. , Width 36 ft. , Height 6 ft.
Structure Inlet
Water Depth: 2.5 ft.
Water Velocity*: 0.4 ft./sec.
Structure Outlet
Water Depth: 2.7 ft.
Water Velocity*: 0.5 ft./sec.
*Water Velocities were measured 2.5 ft. below Surface (with Meter)
Stream Information
Stream Flow: Bankfull
Riffle Information
Water Depth: 1.9 ft.
Bankfull Width: 22 ft.
Wetted Width: 22 ft.
Water Velocity: 0.8 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel County Road (Seasonal)
Road Condition: Good
Road Width at Culvert: 16 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Left Approach
Length: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.4848 tons/year
Right Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.6083 tons/year
Erosion Information
Total Erosion at Crossing: 1.1536 tons/year
Extent of Erosion: Minor
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Reaching Stream?
Right Approach
300 ft.
2 ft.
0.1 ft.
Left Approach
250 ft.
2 ft.
0.1 ft.
Summary Information
Fish Passability 0.9