Road Stream Crossing Site PM_M077
Pere Marquette River Watershed, Swan Creek
Darr Rd
Eden Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 43.89363
, -86.25893
T17N
R16W
Sec 6
Owned by Private
Fish Passability 0.9
Total Erosion: 2.164 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
Structure Interior: smooth
Dimensions of Structure: Length 25 ft.
, Width 10 ft.
, Height 5.5 ft.
Structure Inlet
Water Depth: 0.8 ft.
Water Velocity*: 0.8 ft./sec.
Structure Outlet
Water Depth: 0.6 ft.
Water Velocity*: 0.8 ft./sec.
*Water Velocities were measured 0.5 ft. below Surface
(with Meter)
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.4 ft.
Bankfull Width: 15 ft.
Wetted Width: 14 ft.
Water Velocity: 0.6 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel
County Road
Road Condition: Good
Road Width at Culvert: 23 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Slope: Vertical
Slope: Vertical
Approaches
Left Approach
Length: 310 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.462
Erosion: 0.9075 tons/year
Right Approach
Length: 400 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.48
Erosion: 1.2165 tons/year
Erosion Information
Total Erosion at Crossing: 2.164 tons/year
Extent of Erosion: Minor
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Left Approach |
200 ft. |
1 ft. |
0.1 ft. |
yes |
Gravel |
0.02 |
Right Approach |
200 ft. |
1 ft. |
0.1 ft. |
yes |
Gravel |
0.02 |
Summary Information
Fish Passability 0.9