Road Stream Crossing Site S060

Boardman River Watershed, Robbin's Creek

Private Trail

Garfield Twp, Grand Traverse County

GPS Coordinates: 44.70053 , -85.63062

T27N R11W Sec 34

Road Width at Culvert: 8 ft.

Road Surface: Sand

Maintenance: seasonal

Low Point: At Stream

Existing Drainage Control? no

Any Failings? no

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

Is this crossing constricted? yes

Are there adjacent wetlands? yes

Slope: 6-10%

Vegetation: heavy

Slope: 6-10%

Vegetation: heavy

Shape: round

Length: 12 ft.

Diameter: 1.5 ft diameter ft.

Material: galvanized

Condition :poor

Flow: clear

Fill Depth: 1 ft.

Embankment Slope: 1:1 slope

Fill Depth: 1 ft.

Embankment Slope: 1:1 slope

Stream Width: 6 ft.

Stream Depth: 3 in.

Stream Current: fast

Stream Substrate: sand,gravel

Stream Width: 10 ft.

Stream Depth: 24 in.

Stream Current: moderate

Stream Substrate: sand

Is there Streambank erosion beside the crossing? yes

Is there embankment erosion? yes

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? yes

 

Extent of Erosion: severe

Cause of Erosion: Inadequate culvert, storm runoff

Action Recommended? yes

Add pavement? no

Add paved raised edge? no

Increase fill? no

Replace culvert(s)? no

Dimensions of replacement: open bottom structure, 8 ft wide 20 ft long

Extend culvert(s)? no

Comments: Crossing has washed out during major rain events in the past contributing major amounts of sediment.