Road Stream Crossing Site B-012

Betsie River Watershed, Little Betsie River

Nessen Rd

Colfax Twp, Benzie County

GPS Coordinates: 44.53318435 , -85.87838376

T25N R13W Sec 28

Road Width at Culvert: 14 ft.

Road Surface: Gravel

Maintenance: seasonal

Low Point: 50 feet on either side of bridge center

Existing Drainage Control? yes

Any Failings? yes

Type of Crossing: Bridge

Is this crossing constricted? no

Are there adjacent wetlands? yes

Length: 500 ft.

Slope: 1-5%

Vegetation: heavy

Length: 200 ft.

Slope: 1-5%

Vegetation: heavy

Flow: clear

Fill Depth: 0 ft.

Embankment Slope: 1.5:1

Fill Depth: 0 ft.

Embankment Slope: 1.5:1

Stream Width: 20 ft.

Stream Depth: 1 in.

Stream Current: slow

Stream Substrate: sand

Stream Width: 25 ft.

Stream Depth: 2 in.

Stream Current: moderate

Stream Substrate: sand

Is there Streambank erosion beside the crossing? no

Is there embankment erosion? yes

Is there erosion at the culvert outlet? no

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

Is there pooling at the outlet? no

Is there sand over the crossing? yes

 

Cause of Erosion: High recreational use, old structure.

Action Recommended? no

Add pavement? yes

Add paved raised edge? no

Number of erosion control structures: 0

Number of sediment basins: 0

Number of diversion outlets: 2

Increase fill? yes

Replace culvert(s)? no

Dimensions of replacement: 0

Extend culvert(s)? no

Lineal feet to extend: 0

Other Treatments: Replace bridge, regrade to move low points. Pavement cost includes sites B-12, B-13 and B-14.