Road Stream Crossing Site B-021

Betsie River Watershed, Little Betsie River

Thompsonville Rd

Colfax Twp, Benzie County

GPS Coordinates: 44.53171759 , -85.93856331

T25N R13W Sec 30

Road Width at Culvert: 26 ft.

Road Surface: Paved

Maintenance: year around

Low Point: 200 ft. on right approach

Existing Drainage Control? yes

Any Failings? no

Type of Crossing: culvert(s) (twin culvert)

Is this crossing constricted? no

Are there adjacent wetlands? yes

Length: 250 ft.

Slope: 1-5%

Vegetation: partial

Length: 0 ft.

Slope: 0%

Vegetation: partial

Length: 80 ft.

Diameter: 34, 62 ft.

Material: galvanized

Condition :fair

Flow: obstructed

Fill Depth: 4 ft.

Embankment Slope: 2:1

Fill Depth: 4 ft.

Embankment Slope: 2:1

Stream Width: 15 ft.

Stream Depth: 4 in.

Stream Current: moderate

Stream Substrate: sand

Stream Width: 15 ft.

Stream Depth: 4 in.

Stream Current: fast

Stream Substrate: sand

Is there Streambank erosion beside the crossing? yes

Is there embankment erosion? no

Is there erosion at the culvert outlet? no

Is there erosion at the shoulder and/or ditch? yes

Is there pooling at the outlet? yes

Is there sand over the crossing? no

 

Extent of Erosion: moderate

Cause of Erosion: Culverts too small, recreational pressures.

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? no

Replace culvert(s)? no

Dimensions of replacement: 2

Extend culvert(s)? no

Lineal feet to extend: 0