Road Stream Crossing Site BT_G013

Betsie River Watershed, Mason Creek
E Duck Lake Rd
Green Lake Twp, Grand Traverse County
Information collected by:
GPS Coordinates: 44.63131 , -85.72129
T26N R12W Sec 23
Owned by Private
Perch Height: 2 ft.
Total Erosion: 40.2714 tons/year
Severity: Severe
Year Inventoried: 2014
Site Location
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Culverts: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: Freefall into Pool
Structure Material: Metal
Structure Substrate: None
General Conditions: Poor
Multiple Culverts/Spans
Culvert/Span
Width
Length
Height
Material
2
4.1 ft.
30 ft.
4.1 ft.
Metal
Structure Interior: corrugated
Dimensions of Structure: Length 43 ft. , Width 4.1 ft. , Height 4.1 ft.
Perch Height: 2 ft.
Structure Inlet
Water Depth: 1.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.9 ft./sec.
Structure Outlet
Water Depth: 2.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 10.5 ft./sec.
*Water Velocities were measured 1 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 42 ft. , Width 39 ft. , Depth 3.2 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 1.3 ft.
Bankfull Width: 18 ft.
Wetted Width: 13 ft.
Water Velocity: 1.8 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 30 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 5 ft.
Slope: More than 1:2
Downstream
Fill Depth: 6.5 ft.
Slope: Vertical
Approaches
Left Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.1369 tons/year
Right Approach
Length: 296 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.458
Erosion: 0.1346 tons/year
Erosion Information
Total Erosion at Crossing: 40.2714 tons/year
Extent of Erosion: Severe
Notes:

Severely eroded downstream stream banks.

Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Downstream Streambank
500 ft.
20 ft.
2 ft.
yes
Gravelly Loam
20
Right Downstream Streambank
500 ft.
20 ft.
2 ft.
yes
Gravelly Loam
20
Summary Information
Erosion is an area of concern for this site.

Erosion and fish passage.

A future visit to this site is recommended.

Perched/aged culvert in poor conditon, large scour pool.