Road Stream Crossing Site S606

Boardman River Watershed, South Branch Boardman River

Broomhead Rd

Crossing: Broomhead Road / South Branch Boardman River

Union Twp, Grand Traverse County

GPS Coordinates: 44.6754 , -85.38654

T26N R09W Sec 3

Road Width at Culvert: 21 ft.

Road Surface: Gravel

Maintenance: year around

Low Point: 120 feet North of crossing, 80 feet South of cross

Existing Drainage Control? no

Any Failings? no

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

Is this crossing constricted? yes

Are there adjacent wetlands? yes

Length: 250 ft.

Slope: 0%

Vegetation: heavy

Length: 475 ft.

Slope: 1-5%

Vegetation: heavy

Shape: arc pipe

Length: 36.5 ft.

Diameter: 7.5 ft wide, 5.5 ft tall ft.

Material: galvanized

Condition :good

Flow: clear

Fill Depth: 0.5 ft.

Embankment Slope: 1:1 slope

Fill Depth: 0.5 ft.

Embankment Slope: vertical

Stream Width: 22 ft.

Stream Depth: 36 in.

Stream Current: moderate

Stream Substrate: gravel

Stream Width: 25 ft.

Stream Depth: 30 in.

Stream Current: moderate

Stream Substrate: 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: minor

Cause of Erosion: road runoff

Action Recommended? yes

Add pavement? yes

Pave Left Approach: 250 Lineal Feet

Pave Right Approach: 475 Lineal Feet

Add paved raised edge? yes

Number of diversion outlets: 2

Increase fill? no

Replace culvert(s)? no

Dimensions of replacement: low-profile box, 25 ft wide, 50 ft long

Extend culvert(s)? no

Other Treatments: Rock rip rap, revegetation