Road Stream Crossing Site PM_M049

Pere Marquette River Watershed, Black Creek
Custer Rd
Custer Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 43.9631 , -86.21854
T18N R16W Sec 10
Owned by Private
Fish Passability 0.5
Total Erosion: 1.5449 tons/year
Severity: Severe
Year Inventoried: 2014
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Erosion
Erosion
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Headwall
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Structure Interior: corrugated
Dimensions of Structure: Length 100 ft. , Width 6 ft. , Height 6 ft.
Percentage Plugged: Inlet: 76% to 100%
Structure Inlet
Water Depth: 0.8 ft.
Water Velocity*: 0.3 ft./sec.
Structure Outlet
Water Depth: 2.5 ft.
Water Velocity*: 0.1 ft./sec.
*Water Velocities were measured at the Surface (with Meter)
Additional Comments
severe erosion-headwall washed out in inlet blocked by logs
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 50 ft. , Width 30 ft. , Depth 4 ft.
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 18 ft.
Wetted Width: 12 ft.
Water Velocity: 0.5 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 32 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 30 ft.
Slope: 1:1.5
Downstream
Fill Depth: 30 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 200 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0106 tons/year
Right Approach
Length: 300 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.4
Erosion: 0.4443 tons/year
Erosion Information
Total Erosion at Crossing: 1.5449 tons/year
Extent of Erosion: Severe
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Upstream Streambank
20 ft.
20 ft.
1 ft.
yes
Sand
0.44
Right Upstream Streambank
20 ft.
20 ft.
1 ft.
yes
Sand
0.44
Left Downstream Embankment
15 ft.
25 ft.
1 ft.
yes
Clay
0.21
Summary Information
Fish Passability 0.5
Erosion is an area of concern for this site. severe erosion, headwall is destroyed and inlet is blocked by logs
A future visit to this site is recommended. very poor condition