Road Stream Crossing Site S418

Boardman River Watershed, Twenty-two Creek

Mayfield Rd

Crossing: Mayfield Road / Twenty-two Creek

Union Twp, Grand Traverse County

GPS Coordinates: 44.62769 , -85.38701

T26N R09W Sec 22, 27

Road Width at Culvert: 17 ft.

Road Surface: Gravel

Maintenance: seasonal

Low Point: 35 ft west of crossing

Existing Drainage Control? no

Any Failings? no

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

Is this crossing constricted? yes

Are there adjacent wetlands? yes

Comments: Gravel fom road runoff, woody debris upstream and downstream

Length: 250 ft.

Slope: 0%

Vegetation: heavy

Length: 300 ft.

Slope: 1-5%

Vegetation: heavy

Shape: round

Length: 22 ft.

Diameter: 1.5 ft diameter ft.

Material: galvanized

Condition :fair

Flow: clear

Fill Depth: 1.5 ft.

Embankment Slope: vertical

Fill Depth: 2 ft.

Embankment Slope: vertical

Stream Width: 12 ft.

Stream Depth: 4 in.

Stream Current: moderate

Stream Substrate: sand

Stream Width: 9 ft.

Stream Depth: 4 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? yes

 

Extent of Erosion: moderate

Cause of Erosion: undersized culverts

Action Recommended? yes

Add pavement? yes

Pave Left Approach: 250 Lineal Feet

Pave Right Approach: 300 Lineal Feet

Add paved raised edge? yes

Number of diversion outlets: 2

Increase fill? no

Replace culvert(s)? no

Dimensions of replacement: 10 ft wide, 36 ft long low-profile

Extend culvert(s)? no

Other Treatments: 3 cu. yds rock riprap, revegetation