Road Stream Crossing Site MAN_WE_091
Big Manistee River Watershed, Unknown (tributary to Silver Creek)
35 Rd
Colfax Twp,
Wexford County
Information collected by:
Site Location
GPS Coordinates: 44.4157
, -85.47943
T23N
R10W
Sec 2
Owned by Private
Structure is NOT Perched
Total Erosion: 1.5569 tons/year
Severity: Restored
Year Inventoried: 2014
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Erosion
Erosion
Erosion
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
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 57 ft.
, Width 8 ft.
, Height 5.5 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.2 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.5 ft./sec.
*Water Velocities were measured 0.3 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Upstream Pond: Length 0 ft.
, Width 0 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 0.7 ft.
Bankfull Width: 9 ft.
Wetted Width: 7.5 ft.
Water Velocity: 1.6 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Gravel
County Road
Road Condition: Fair
Road Width at Culvert: 15 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3 ft.
Slope: More than 1:2
Downstream
Fill Depth: 3.5 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 400 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.6
Erosion: 0.9917 tons/year
Right Approach
Length: 260 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.526
Erosion: 0.5651 tons/year
Erosion Information
Total Erosion at Crossing: 1.5569 tons/year
Extent of Erosion: Stabilized
Notes:
New structure, erosion appears to be stabilizing and stream is returning to its natural course.
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Downstream Streambank |
20 ft. |
2 ft. |
2 ft. |
yes |
Clay |
0 |
Summary Information
Erosion is an area of concern for this site.