Road Stream Crossing Site BSAB_BS27

Big Sable River Watershed, Little Sable River
Manales Rd
Sheridan Twp, Mason County
Information collected by:
Site Location
GPS Coordinates: 44.04 , -86.04986
T19N R15W Sec 13
Owned by Private
Federal
Fish Passability 0.5
Structure is NOT Perched
Total Erosion: 0.2624 tons/year
Severity: Moderate
Year Inventoried: 2011
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Pipe Arch
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Poor
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
1
7 ft.
50 ft.
5 ft.
Metal
2
7 ft.
50 ft.
5 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 50 ft. , Width 7 ft. , Height 5 ft.
Percentage Plugged: Inlet: 1% to 25% Outlet: 1% to 25%
Structure is NOT Perched
Structure Inlet
Water Depth: 1.41 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0.9 ft./sec.
Structure Outlet
Water Depth: 1 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.5 ft./sec.
*Water Velocities were measured 0.6 ft. below Surface (with Meter)
Additional Comments
The outlet concrete is failing and falling into the stream
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 15 ft. , Width 5 ft. , Depth 2.7 ft.
Upstream Pond: Length 18 ft. , Width 12 ft. , Depth 3.5 ft.
Riffle Information
Water Depth: 0.58 ft.
Bankfull Width: 24.7 ft.
Wetted Width: 21.6 ft.
Water Velocity: 1 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel County Road
Road Condition: Good
Road Width at Culvert: 25 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 2.5 ft.
Slope: Vertical
Downstream
Fill Depth: 3 ft.
Slope: Vertical
Approaches
Left Approach
Length: 468 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.1612 tons/year
Right Approach
Length: 294 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.1012 tons/year
Erosion Information
Total Erosion at Crossing: 0.2624 tons/year
Extent of Erosion: Moderate
Notes: Scour erosion both at the inlet and outlet
Summary Information
Fish Passability 0.5
A future visit to this site is recommended. to clear debris from culverts and assess structural intergrity of structure
These non-native species were observerd at this site: Knapweed