Road Stream Crossing Site B-017

Betsie River Watershed, Little Betsie River
Bentley Rd
Colfax Twp, Benzie County
Information collected by:
GPS Coordinates: 44.53478 , -85.91042
T25N R13W Sec 29
Owned by State
Structure is NOT Perched
Total Erosion: 0.0958 tons/year
Severity: Restored
Year Inventoried: 2015
Site Location
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Culverts: 1
Structure Shape: Open Bottom Arch
Inlet Type: Wingwall 30-70 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 58 ft. , Width 15.5 ft. , Height 3.7 ft.
Structure is NOT Perched
Structure Inlet
Water Depth: 1.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.5 ft./sec.
Structure Outlet
Water Depth: 1.2 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.3 ft./sec.
*Water Velocities were measured 0.8 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: 0.8 ft.
Bankfull Width: 26 ft.
Wetted Width: 23.5 ft.
Water Velocity: 1.7 ft./sec. (Measured with Meter)
Dominant Substrate: Sand
Road Information
Paved County Road (Seasonal)
Road Condition: Good
Road Width at Culvert: 21 ft.
Location of Low Point: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 300 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.46
Erosion: 0.0958 tons/year
Right Approach
Length: 0 ft.
Slope: Less Than 1%
Vegetation: Heavy
LS Factor: 0.05
Erosion: 0 tons/year
Erosion Information
Total Erosion at Crossing: 0.0958 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.

No.