Road Stream Crossing Site B-018
Betsie River Watershed, Little Betsie River
Bentley Rd
Colfax Twp,
Benzie County
Information collected by:
Site Location
GPS Coordinates: 44.53497
, -85.93015
T25N
R13W
Sec 30
Owned by Private
Structure is NOT Perched
Total Erosion: 0.0597 tons/year
Severity: Restored
Year Inventoried: 2015
Site ID
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 1
Structure Shape: Open Bottom Arch
Inlet Type: Wingwall 30-70 Degree
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Mixture
General Conditions: Good
Structure Interior: corrugated
Dimensions of Structure: Length 65 ft.
, Width 16.5 ft.
, Height 6 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: 0.7 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 1.8 ft./sec.
*Water Velocities were measured 0.6 ft. below Surface
(with Meter)
Additional Comments
CRA assisted with installation.
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: 1.1 ft.
Bankfull Width: 19 ft.
Wetted Width: 16 ft.
Water Velocity: 2.6 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: Other
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 3 ft.
Slope: More than 1:2
Downstream
Fill Depth: 3 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 180 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.418
Erosion: 0.0597 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: 0.0597 tons/year
Extent of Erosion: Moderate
Summary Information
Erosion is an area of concern for this site.
No.
A future visit to this site is recommended.
No.