Road Stream Crossing Site GTBAY_BRD021
Boardman River Watershed, Boardman River
South Airport Rd
Garfield Twp,
Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.73351
, -85.616594
T27N
R11W
Sec 15
Owned by Private
Total Erosion: 0.6413 tons/year
Severity: Minor
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: 2
Structure Shape: Pipe Arch
Inlet Type: Mitered
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Fair
Multiple Culverts/Spans | ||||
Culvert/Span | Width | Length | Height | Material |
1 |
12.5 ft. |
70 ft. |
9 ft. |
Metal |
2 |
12.5 ft. |
70 ft. |
9 ft. |
Metal |
Structure Interior: corrugated
Dimensions of Structure: Length 70 ft.
, Width 12.5 ft.
, Height 9 ft.
Structure Inlet
Water Depth: 6.3 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.8 ft./sec.
Structure Outlet
Water Depth: 6.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2.4 ft./sec.
*Water Velocities were measured 3 ft. below Surface
(with Meter)
Additional Comments
Water depth and velocity measurements recorded for culvert #2. Boardman Lake downstream
Stream Information
Stream Flow: Less than Bankfull
Road Information
Paved
County Road
Road Condition: Good
Road Width at Culvert: 40 ft.
Location of Low Point: At Stream
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 3 ft.
Slope: 1:1
Downstream
Fill Depth: 3 ft.
Slope: 1:1
Approaches
Left Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.64
Erosion: 0.4231 tons/year
Right Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Partial
LS Factor: 0.55
Erosion: 0.2182 tons/year
Erosion Information
Total Erosion at Crossing: 0.6413 tons/year
Location of Erosion | Erosion Dimensions | Eroded Material | Material Eroded | Total Erosion | ||
facing downstream | Length | Width | Depth | Reaching Stream? | (tons/year) | |
Right Upstream Embankment |
6 ft. |
5 ft. |
6 ft. |
yes |
Sandy Loam |
|
Left Upstream Embankment |
4 ft. |
8 ft. |
1 ft. |
yes |
Gravelly Loam |
|
Right Downstream Embankment |
2 ft. |
4 ft. |
1 ft. |
yes |
Gravelly Loam |
|
Left Downstream Embankment |
2 ft. |
4 ft. |
1 ft. |
yes |
Gravelly Loam |
|
Summary Information