Road Stream Crossing Site GTBAY_S606
Boardman River Watershed, S Branch Boardman River
Broomhead Rd
Union Twp,
Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.6754
, -85.386539
T26N
R9W
Sec 03
Owned by Private
Fish Passability 0
Total Erosion: 0.0706 tons/year
Severity: Severe
Year Inventoried: 2020
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Erosion
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: Rock
General Conditions: Fair
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
7.8 ft. |
36 ft. |
5.5 ft. |
Metal |
2 |
7.8 ft. |
36 ft. |
5.4 ft. |
Metal |
Structure Interior: corrugated
Dimensions of Structure: Length 36 ft.
, Width 7.8 ft.
, Height 5.5 ft.
Structure Inlet
Water Depth: 1.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3.7 ft./sec.
Structure Outlet
Water Depth: 1.4 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.1 ft./sec.
*Water Velocities were measured 1 ft. below Surface
(with Meter)
Additional Comments
Water depth and velocity measurements recorded for culvert #1
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 30 ft.
, Width 30 ft.
, Depth 4.5 ft.
Riffle Information
Water Depth: 1.3 ft.
Bankfull Width: 44 ft.
Wetted Width: 32 ft.
Water Velocity: 2.8 ft./sec.
(Measured with Meter)
Dominant Substrate: Sand
Road Information
Gravel
County Road
Road Condition: Fair
Road Width at Culvert: 22 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 0.7 ft.
Slope: 1:2
Downstream
Fill Depth: 0.7 ft.
Slope: Vertical
Approaches
Left Approach
Length: 50 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0152 tons/year
Right Approach
Length: 50 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0152 tons/year
Erosion Information
Total Erosion at Crossing: 0.0706 tons/year
Extent of Erosion: Moderate
Notes: Erosion hole in downstream embankment
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Downstream Embankment |
1.2 ft. |
1.2 ft. |
5 ft. |
yes |
Sandy Loam |
0.0403 |
Summary Information
Fish Passability 0