Road Stream Crossing Site B-020

Betsie River Watershed, Betsie River
King Rd
Weldon Twp, Benzie County
Information collected by:
GPS Coordinates: 44.54221 , -85.94246
T25N R14W Sec 24
Owned by Private
State
Structure is NOT Perched
Total Erosion: 1.8505 tons/year
Severity: Restored
Year Inventoried: 2015
Site Location
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Erosion
Crossing Information
Type of Crossing: Bridge
Structure Shape: Open Bottom Square/Rectangle
Inlet Type: Wingwall 10-30 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Fair
Structure Interior: corrugated
Dimensions of Structure: Length 25 ft. , Width 58 ft. , Height 10 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 3 ft./sec.
Structure Outlet
Water Depth: 2.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 2 ft./sec.
*Water Velocities were measured 1.5 ft. below Surface (with Meter)
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Riffle Information
Water Depth: 1.5 ft.
Bankfull Width: 45 ft.
Wetted Width: 40 ft.
Water Velocity: 2 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Paved County Road
Road Condition: Good
Road Width at Culvert: 24 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Fill Depth: 0 ft.
Slope: Vertical
Fill Depth: 0 ft.
Slope: Vertical
Approaches
Left Approach
Length: 650 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.783
Erosion: 0.9192 tons/year
Right Approach
Length: 650 ft.
Slope: 6% to 10%
Vegetation: Heavy
LS Factor: 1.783
Erosion: 0.9192 tons/year
Erosion Information
Total Erosion at Crossing: 1.8505 tons/year
Extent of Erosion: Minor
Erosion is occurring and corrective actions can be installed to address the problem.
Notes:

Erosion between road and wingwall. Pavement is starting to crumble, see picture.

Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Upstream Embankment
6 ft.
10 ft.
1 ft.
no
Gravelly Loam
0.006
Left Downstream Embankment
6 ft.
10 ft.
1 ft.
no
Gravelly Loam
0.006
Summary Information
Erosion is an area of concern for this site.

No.

A future visit to this site is recommended.

Yes, to monitor erosion.