Road Stream Crossing Site GTBAY_U009

East Bay Shoreline & Tributaries Watershed, Unnamed
Winter Ridge Drive
East Bay Twp, Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.731432 , -85.535678
T27N R10W Sec 16
Owned by Private
Fish Passability 1
Total Erosion: 1.8978 tons/year
Severity: Moderate
Year Inventoried: 2020
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Gravel
General Conditions: Poor
Structure Interior: corrugated
Dimensions of Structure: Length 29 ft. , Width 1.8 ft. , Height 1.8 ft.
Structure Inlet
Water Depth: 0.9 ft.
Embedded Depth of Structure: 0.6 ft.
Water Velocity*: 0.4 ft./sec.
Structure Outlet
Water Depth: 0.4 ft.
Embedded Depth of Structure: 0.8 ft.
Water Velocity*: 0.7 ft./sec.
*Water Velocities were measured 0.5 ft. below Surface (with Meter)
Additional Comments
Change passability score to 1, ample water depth and structure velocities within range, not a fish barrier. Erosion may still be an area of concern at this site.
Stream Information
Stream Flow: Less than 1/2 Bankfull
Riffle Information
Water Depth: 0.3 ft.
Bankfull Width: 2.1 ft.
Wetted Width: 1.9 ft.
Water Velocity: 1 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel Private Road
Road Condition: Poor
Road Width at Culvert: 20 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1 ft.
Slope: More than 1:2
Downstream
Fill Depth: 0.5 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 10 ft.
Slope: Less Than 1%
Vegetation: None
LS Factor: 0.05
Erosion: 0.0028 tons/year
Right Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.64
Erosion: 1.7631 tons/year
Erosion Information
Total Erosion at Crossing: 1.8978 tons/year
Extent of Erosion: Severe
Notes: Downstream embankment is erosion path from road. There are large sand and gravel deposits.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Right Downstream Embankment
20 ft.
3 ft.
0.3 ft.
yes
Sand
0.132
Summary Information
Fish Passability 1
Erosion is an area of concern for this site. Erosion from road is depositing large amounts of sand and gravel into stream
A future visit to this site is recommended. Monitor/address and fix erosion issue
These non-native species were observerd at this site: Purple Loosestrife, Queen Anne's Lace, Spotted Knapweed, Autumn Olive, Bull Thistle