Road Stream Crossing Site B-013
Betsie River Watershed, Little Betsie Tributary
Long Rd
Colfax Twp,
Benzie County
Information collected by:
GPS Coordinates: 44.5385875
, -85.89848765
T25N
R13W
Sec 29
Adjacent Land Owned by State
Severity: Moderate
Cost: $200,000.00
Site Location
Inlet
Outlet
Road Approach - Left
Road Approach - Right
Crossing Information
Road Width at Culvert: 11 ft.
Road Surface: Gravel
Maintenance: seasonal
Low Point: 10 ft. to right approach, 50 ft. to left
Existing Drainage Control? no
Any Failings? no
Type of Crossing: culvert(s)
(single culvert)
Is this crossing constricted? no
Are there adjacent wetlands? yes
Approaches
Left Approach
Length: 250 ft.
Slope: 1-5%
Vegetation: heavy
Right Approach
Length: 0 ft.
Slope: 0%
Vegetation: heavy
Culvert Information
Length: 35 ft.
Diameter: 48 ft.
Material: galvanized
Condition :fair
Flow: clear
Embankments
Upstream
Fill Depth: 1 ft.
Embankment Slope: >2:1
Downstream
Fill Depth: 2 ft.
Embankment Slope: >2:1
Stream Information
Upstream
Stream Width: 12 ft.
Stream Depth: 4 in.
Stream Current: slow
Stream Substrate: sand
Downstream
Stream Width: 10 ft.
Stream Depth: 5 in.
Stream Current: slow
Stream Substrate: sand
Erosion Information
Conditions
Is there Streambank erosion beside the crossing? no
Is there embankment erosion? no
Is there erosion at the culvert outlet? no
Is there erosion at the shoulder and/or ditch? no
Is there pooling at the outlet? yes
Is there sand over the crossing? no
Other Conditions: Culvert literally underwater.
Extent of Erosion: moderate
Cause of Erosion: Culvert too small.
Recommended Treatments
Action Recommended? no
Add pavement? no
Add paved raised edge? no
Number of erosion control structures: 0
Number of sediment basins: 0
Number of diversion outlets: 0
Increase fill? yes
Replace culvert(s)? no
Dimensions of replacement: 1
Extend culvert(s)? no
Lineal feet to extend: 1
Severity:Moderate
This page last updated on 2/9/2022.