Road Stream Crossing Site GTBAY_BRD011

Boardman River Watershed, Boardman River
Brown Bridge Rd
Paradise Twp, Grand Traverse County
Information collected by:
Site Location
GPS Coordinates: 44.642268 , -85.51521
T26N R10W Sec 22
Owned by Local Government
Private
Fish Passability 0
Total Erosion: 0.1749 tons/year
Severity: Severe
Year Inventoried: 2020
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Erosion
Erosion
Erosion
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: None
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 56 ft. , Width 15.5 ft. , Height 9.1 ft.
Structure Inlet
Water Depth: 1.8 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.7 ft./sec.
Structure Outlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 4.9 ft./sec.
*Water Velocities were measured 1 ft. below Surface (with Meter)
Additional Comments
Water depth and velocity recorded for culvert #1
Stream Information
Stream Flow: Less than Bankfull
Riffle Information
Water Depth: 1.5 ft.
Bankfull Width: 52 ft.
Wetted Width: 50 ft.
Water Velocity: 2.6 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Poor
Road Width at Culvert: 21 ft.
Location of Low Point: Other
Runoff Path: Ditch
Embankments
Upstream
Fill Depth: 1 ft.
Slope: 1:1.5
Downstream
Fill Depth: 1 ft.
Slope: 1:1.5
Approaches
Left Approach
Length: 500 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.5
Erosion: 0.1736 tons/year
Right Approach
Length: 40 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0.0014 tons/year
Erosion Information
Total Erosion at Crossing: 0.1749 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
20 ft.
2 ft.
0.1 ft.
yes
Sand
Left Downstream Embankment
20 ft.
2 ft.
0.1 ft.
yes
Sand
Summary Information
Fish Passability 0