Road Stream Crossing Site S421

Boardman River Watershed, Bancroft Creek

Townline Rd

Crossing: Townline Road / Bancroft Creek

Grand Traverse County

GPS Coordinates: 44.57823 , -85.45507

Road Width at Culvert: 22 ft.

Road Surface: Paved

Maintenance: year around

Low Point: At Stream

Existing Drainage Control? no

Any Failings? no

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

Is this crossing constricted? yes

Are there adjacent wetlands? yes

Slope: 1-5%

Vegetation: heavy

Slope: 1-5%

Vegetation: heavy

Shape: round

Length: 34 ft.

Diameter: 3 ft diameter ft.

Material: galvanized

Condition :poor

Flow: clear

Fill Depth: 0.5 ft.

Embankment Slope: 1.5:1 slope

Fill Depth: 1.5 ft.

Embankment Slope: 1:1 slope

Stream Width: 4 ft.

Stream Depth: 3 in.

Stream Current: slow

Stream Substrate: sand

Stream Width: 3 ft.

Stream Depth: 2 in.

Stream Current: moderate

Stream Substrate: sand,gravel

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? no

 

Extent of Erosion: severe

Cause of Erosion: undersized culverts

Action Recommended? yes

Add pavement? no

Add paved raised edge? no

Increase fill? yes

Replace culvert(s)? no

Dimensions of replacement: 5 feet wide, 45 feet long, low-profile box, alum.

Extend culvert(s)? no

Comments: Crossing is on common line of Fife Lake Township (T25N R9W S7) and Paradise Township (T25N R10W S12).

Pavement lifting at crossing, culverts shake when cars pass, cause is too little fill.

No flow through left culvert.