Road Stream Crossing Site PM_M149
Pere Marquette River Watershed, Pere Marquette tributary
Conrad Rd
Amber Twp,
Mason County
Information collected by:
Site Location
GPS Coordinates: 43.93428
, -86.36985
T18N
R17W
Sec 20
Owned by Private
Fish Passability 0.5
Total Erosion: 0.2243 tons/year
Severity: Moderate
Year Inventoried: 2014
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Concrete
Structure Substrate: None
General Conditions: Fair
Structure Interior: smooth
Dimensions of Structure: Length 60 ft.
, Width 2.5 ft.
, Height 2.5 ft.
Percentage Plugged:
Inlet: 26% to 50%
Structure Inlet
Water Depth: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
Structure Outlet
Water Depth: 0.1 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the Surface
(with Meter)
Additional Comments
inlet blocked by fallen tree
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 10 ft.
, Width 4 ft.
, Depth 0.8 ft.
Riffle Information
Water Depth: 0.1 ft.
Bankfull Width: 14 ft.
Wetted Width: 2 ft.
Water Velocity: 0.1 ft./sec.
(Measured with Meter)
Dominant Substrate: Silt
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 20 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 4 ft.
Slope: 1:1.5
Downstream
Fill Depth: 7 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 170 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.164
Erosion: 0.1308 tons/year
Right Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.0912 tons/year
Erosion Information
Total Erosion at Crossing: 0.2243 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 Downstream Streambank |
10 ft. |
10 ft. |
0.2 ft. |
yes |
Sand |
0.0022 |
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. large fallen tree blocking inlet