Road Stream Crossing Site PM_O001
Pere Marquette River Watershed, Big South Branch Pere Marquette
Washington Rd
Colfax Twp,
Oceana County
Information collected by:
Site Location
GPS Coordinates: 43.815841983228
, -86.084630638361
T16N
R15W
Sec 3
Owned by Private
Total Erosion: 0.0945 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: Wingwall 30-70 Degree
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: Mixture
General Conditions: Good
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
40 ft. |
32 ft. |
10 ft. |
Concrete |
2 |
40 ft. |
32 ft. |
10 ft. |
Concrete |
3 |
40 ft. |
32 ft. |
10 ft. |
Concrete |
Structure Interior: smooth
Dimensions of Structure: Length 32 ft.
, Width 120 ft.
, Height 10 ft.
Structure Inlet
Water Depth: 1.2 ft.
Water Velocity*: 1.3 ft./sec.
Structure Outlet
Water Depth: 1.2 ft.
Water Velocity*: 2.4 ft./sec.
*Water Velocities were measured 1 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 62 ft.
Wetted Width: 60 ft.
Water Velocity: 2.3 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
County Road
Road Condition: Fair
Road Width at Culvert: 28 ft.
Location of Low Point: Other
Runoff Path: Ditch
Slope: Vertical
Slope: Vertical
Approaches
Left Approach
Length: 300 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0139 tons/year
Right Approach
Length: 180 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.418
Erosion: 0.0696 tons/year
Erosion Information
Total Erosion at Crossing: 0.0945 tons/year
Extent of Erosion: Minor
Notes:
erosion is due to access trail
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Upstream Embankment |
50 ft. |
3 ft. |
0.2 ft. |
yes |
Sand |
0.011 |
Summary Information
Erosion is an area of concern for this site.