Road Stream Crossing Site LTB-149

Little Traverse Bay Watershed, Unknown tributary
Old US 31 and Townsend
Resort Twp, Emmet County
Information collected by:
Tip of the Mitt Watershed Council
Site Location
GPS Coordinates: 45.35753369 , -85.03837755
Owned by Private
Fish Passability 0
Perch Height: 3 ft.
Total Erosion: 2.6356 tons/year
Severity: Severe
Year Inventoried: 2014
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 70 ft. , Width 4.7 ft. , Height 4.7 ft.
Percentage Plugged: Inlet: 1% to 25%
Percentage Crushed: In Pipe: 1% to 25%
Perch Height: 3 ft.
Structure Inlet
Water Depth: 0.04 ft.
Embedded Depth of Structure: 0.5 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.04 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured 0.024 ft. below Surface (with Meter)
Additional Comments
1434 Townsend. Old site ID: LTB-19.
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 12 ft. , Width 8 ft. , Depth 2.75 ft.
Riffle Information
Water Depth: 0.8 ft.
Bankfull Width: 14 ft.
Wetted Width: 14 ft.
Water Velocity: 0.08 ft./sec. (Measured with Meter)
Dominant Substrate: Cobble
Road Information
Paved State Road
Road Condition: Poor
Road Width at Culvert: 23 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 20 ft.
Slope: Vertical
Downstream
Fill Depth: 35 ft.
Slope: Vertical
Approaches
Left Approach
Length: 250 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.44
Erosion: 0.0836 tons/year
Right Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 2.6356 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 Ditch
25 ft.
15 ft.
3 ft.
yes
Loam
1.32
Right Upstream Embankment
10 ft.
5 ft.
1 ft.
yes
Loam
0.176
Left Upstream Embankment
20 ft.
10 ft.
2 ft.
yes
Loam
0.704
Left Downstream Streambank
20 ft.
5 ft.
1 ft.
yes
Loam
0.352
Summary Information
Fish Passability 0
Erosion is an area of concern for this site. heavy erosion reaching stream. Pictures 115,116,120,121,122.
A future visit to this site is recommended. YES. Perched culvert, heavy erosion reaching stream
These non-native species were observerd at this site: Virginia Creeper