Road Stream Crossing Site GTBAY_LEE070
West Bay Shoreline & Tributaries Watershed, Northport Creek
Bay Street
Leelanau Twp,
Leelanau County
Information collected by:
Site Location
GPS Coordinates: 45.13031337
, -85.61394185
T32N
R11W
Sec 34
Owned by Other
Fish Passability 0.5
Severity: Moderate
Year Inventoried: 2020
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
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: Sand
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 35.4 ft.
, Width 3.5 ft.
, Height 3.6 ft.
Structure Inlet
Water Depth: 1.1 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 1.4 ft./sec.
Structure Outlet
Water Depth: 1.8 ft.
Embedded Depth of Structure: 0.1 ft.
Water Velocity*: 1.3 ft./sec.
*Water Velocities were measured 1.6 ft. below Surface
(with Meter)
Additional Comments
Land owned by Ottawa and Chippewa Indians. Outlet and riffle velocities seem high and inconsistent with inlet velocity. Based on double checking, change outlet and riffle velocities to 1.3 and 1.2 respectively. change to Moderate severity and Passabiliy .5. Still an undersized culvert.
Stream Information
Stream Flow: Less than 1/2 Bankfull
Scour Pool: Length 10.8 ft.
, Width 8.8 ft.
, Depth 1.5 ft.
Upstream Pond: Length 9.7 ft.
, Width 11.7 ft.
, Depth 0 ft.
Riffle Information
Water Depth: 0.9 ft.
Bankfull Width: 23 ft.
Wetted Width: 8.6 ft.
Water Velocity: 1.2 ft./sec.
(Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved
Town Road
Road Condition: Good
Road Width at Culvert: 24.5 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 1.6 ft.
Slope: Vertical
Downstream
Fill Depth: 1.9 ft.
Slope: Vertical
Length: 1161 ft.
Slope: 1% to 5%
Vegetation: Partial
Length: 318 ft.
Slope: 1% to 5%
Vegetation: Partial
Erosion Information
Summary Information
Fish Passability 0.5